AST/HIR: Introduce `ExprKind::Err` for better error recovery in the front-end #56999

petrochenkov · 2018-12-20T01:01:53Z

This way we can avoid aborting compilation if expansion produces errors and generate ExprKind::Errs instead.

estebank

Really cool!

CC #48724

src/libsyntax/parse/parser.rs

src/libsyntax/print/pprust.rs

src/test/run-pass/macros/log_syntax-trace_macros-macro-locations.rs

estebank · 2018-12-20T01:46:32Z

src/test/ui/did_you_mean/issue-40396.stderr

+  --> $DIR/issue-40396.rs:12:21
+   |
+LL |     (0..13).collect<Vec<i32>>();
+   |                     ^^^ did you mean `Vec { /* fields */ }`?


The fallout on this case is a bit unfortunate.

In my ideal world we would use something similar to #53578 to parse missing the turbofish and avoid all of these errors, but that's not gonna happen anytime soon.

This is pretty bad, but not actually a fallout from this PR.
(0..13).collect<Vec<i32>>() outside of macros already produced this.
https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=0be590d180bad8cbea3789d5e7d2e269

src/test/ui/issues/issue-10536.stderr

src/test/ui/issues/issue-6596-1.stderr

src/librustc_resolve/macros.rs

src/libsyntax/feature_gate.rs

petrochenkov · 2018-12-21T00:41:36Z

Updated with test fixes and one new commit making sure that all feature-gate errors are recoverable.

estebank · 2018-12-21T01:03:12Z

r=me once travis is happy

petrochenkov · 2018-12-21T10:57:55Z

@bors r=estebank

bors · 2018-12-21T10:57:56Z

📌 Commit 4a6aa36 has been approved by estebank

AST/HIR: Introduce `ExprKind::Err` for better error recovery in the front-end This way we can avoid aborting compilation if expansion produces errors and generate `ExprKind::Err`s instead.

@ghost

Rollup of 10 pull requests Successful merges: - #56188 (enum type instead of variant suggestion unification ) - #56916 (Fix mutable references in `static mut`) - #56917 (Simplify MIR generation for logical operations) - #56953 (Mark tuple structs as live if their constructors are used) - #56964 (Remove `TokenStream::JointTree`.) - #56966 (Correct strings for raw pointer deref and array access suggestions) - #56999 (AST/HIR: Introduce `ExprKind::Err` for better error recovery in the front-end) - #57020 (Point to cause of `fn` expected return type) - #57032 (fix deprecation warnings in liballoc benches) - #57053 (Fix alignment for array indexing) Failed merges: r? @ghost

Centril · 2018-12-23T13:51:43Z

This PR failed in a rollup: #57075 (comment)

pietroalbini · 2018-12-24T10:47:44Z

@bors r-

bors · 2018-12-26T18:55:28Z

☔ The latest upstream changes (presumably #57108) made this pull request unmergeable. Please resolve the merge conflicts.

petrochenkov · 2018-12-27T00:13:26Z

@bors r=estebank

bors · 2018-12-27T00:13:27Z

📌 Commit fdde6df45855155510ca567b28dc37233bab9773 has been approved by estebank

bors · 2018-12-27T00:57:42Z

⌛ Testing commit fdde6df45855155510ca567b28dc37233bab9773 with merge 220af3d83594be55382de515730c07d9067c41d0...

bors · 2018-12-27T04:31:33Z

⌛ Testing commit 994215781986afb842e4690592859e68a60092ca with merge 3e5056f704e1e533995af5aef6564c43876feba3...

bors · 2018-12-27T05:32:06Z

💔 Test failed - status-travis

rust-highfive · 2018-12-27T05:32:08Z

The job wasm32-unknown of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

[00:55:58] 
[00:55:58] ---- [ui] ui/macros/macro-comma-behavior.rs#core stdout ----
[00:55:58] diff of stderr:
[00:55:58] 
[00:55:58] 40 LL |             write!(f, "{}",)?;
[00:55:58] 42 
[00:55:58] 42 
[00:55:58] - error: language item required, but not found: `eh_personality`
[00:55:58] - error: aborting due to 8 previous errors
[00:55:58] + error: aborting due to 7 previous errors
[00:55:58] 46 
[00:55:58] 47 
[00:55:58] 47 
[00:55:58] 
[00:55:58] 
[00:55:58] The actual stderr differed from the expected stderr.
[00:55:58] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/macros/macro-comma-behavior.core/macro-comma-behavior.core.stderr
[00:55:58] To update references, rerun the tests and pass the `--bless` flag
[00:55:58] To only update this specific test, also pass `--test-args macros/macro-comma-behavior.rs`
[00:55:58] 
[00:55:58] error in revision `core`: 1 errors occurred comparing output.
[00:55:58] status: exit code: 1
[00:55:58] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/macros/macro-comma-behavior.rs" "--target=wasm32-unknown-unknown" "--cfg" "core" "--error-format" "json" "-Zui-testing" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/macros/macro-comma-behavior.core/a.wasm" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/wasm32-unknown-unknown/native/rust-test-helpers" "-C" "debug_assertions=yes" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/macros/macro-comma-behavior.core/auxiliary" "-A" "unused"
[00:55:58] ------------------------------------------
[00:55:58] 
[00:55:58] ------------------------------------------
[00:55:58] stderr:
[00:55:58] stderr:
[00:55:58] ------------------------------------------
[00:55:58] {"message":"1 positional argument in format string, but no arguments were given","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":577,"byte_end":579,"line_start":20,"line_end":20,"column_start":23,"column_end":25,"is_primary":true,"text":[{"text":"    assert_eq!(1, 1, \"{}\",);","highlight_start":23,"highlight_end":25}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"<::core::macros::assert_eq macros>","byte_start":626,"byte_end":657,"line_start":21,"line_end":21,"column_start":24,"column_end":55,"is_primary":false,"text":[{"text":"left_val , right_val , format_args ! ( $ ( $ arg ) + ) ) } } } } ) ;","highlight_start":24,"highlight_end":55}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":559,"byte_end":583,"line_start":20,"line_end":20,"column_start":5,"column_end":29,"is_primary":false,"text":[{"text":"    assert_eq!(1, 1, \"{}\",);","highlight_start":5,"highlight_end":29}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"assert_eq!","def_site_span":{"file_name":"<::core::macros::assert_eq macros>","byte_start":0,"byte_end":671,"line_start":1,"line_end":21,"column_start":1,"column_end":69,"is_primary":false,"text":[{"text":"( $ left : expr , $ right : expr ) => (","highlight_start":1,"highlight_end":40},{"text":"{","highlight_start":1,"highlight_end":2},{"text":"match ( & $ left , & $ right ) {","highlight_start":1,"highlight_end":33},{"text":"( left_val , right_val ) => {","highlight_start":1,"highlight_end":30},{"text":"if ! ( * left_val == * right_val ) {","highlight_start":1,"highlight_end":37},{"text":"panic ! (","highlight_start":1,"highlight_end":10},{"text":"r#\"assertion failed: `(left == right)`","highlight_start":1,"highlight_end":39},{"text":"  left: `{:?}`,","highlight_start":1,"highlight_end":16},{"text":" right: `{:?}`\"# ,","highlight_start":1,"highlight_end":19},{"text":"left_val , right_val ) } } } } ) ; ( $ left : expr , $ right : expr , ) => (","highlight_start":1,"highlight_end":77},{"text":"{ assert_eq ! ( $ left , $ right ) } ) ; (","highlight_start":1,"highlight_end":43},{"text":"$ left : expr , $ right : expr , $ ( $ arg : tt ) + ) => (","highlight_start":1,"highlight_end":59},{"text":"{","highlight_start":1,"highlight_end":2},{"text":"match ( & ( $ left ) , & ( $ right ) ) {","highlight_start":1,"highlight_end":41},{"text":"( left_val , right_val ) => {","highlight_start":1,"highlight_end":30},{"text":"if ! ( * left_val == * right_val ) {","highlight_start":1,"highlight_end":37},{"text":"panic ! (","highlight_start":1,"highlight_end":10},{"text":"r#\"assertion failed: `(left == right)`","highlight_start":1,"highlight_end":39},{"text":"  left: `{:?}`,","highlight_start":1,"highlight_end":16},{"text":" right: `{:?}`: {}\"# ,","highlight_start":1,"highlight_end":23},{"text":"left_val , right_val , format_args ! ( $ ( $ arg ) + ) ) } } } } ) ;","highlight_start":1,"highlight_end":69}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"format_args!","def_site_span":null}}],"children":[],"rendered":"error: 1 positional argument in format string, but no arguments were given\n  --> /checkout/src/test/ui/macros/macro-comma-behavior.rs:20:23\n   |\nLL |     assert_eq!(1, 1, \"{}\",);\n   |                       ^^\n\n"}
[00:55:58] {"message":"1 positional argument in format string, but no arguments were given","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":674,"byte_end":676,"line_start":23,"line_end":23,"column_start":23,"column_end":25,"is_primary":true,"text":[{"text":"    assert_ne!(1, 2, \"{}\",);","highlight_start":23,"highlight_end":25}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"<::core::macros::assert_ne macros>","byte_start":610,"byte_end":641,"line_start":21,"line_end":21,"column_start":24,"column_end":55,"is_primary":false,"text":[{"text":"left_val , right_val , format_args ! ( $ ( $ arg ) + ) ) } } } } ) ;","highlight_start":24,"highlight_end":55}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":656,"byte_end":680,"line_start":23,"line_end":23,"column_start":5,"column_end":29,"is_primary":false,"text":[{"text":"    assert_ne!(1, 2, \"{}\",);","highlight_start":5,"highlight_end":29}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"assert_ne!","def_site_span":{"file_name":"<::core::macros::assert_ne macros>","byte_start":0,"byte_end":655,"line_start":1,"line_end":21,"column_start":1,"column_end":69,"is_primary":false,"text":[{"text":"( $ left : expr , $ right : expr ) => (","highlight_start":1,"highlight_end":40},{"text":"{","highlight_start":1,"highlight_end":2},{"text":"match ( & $ left , & $ right ) {","highlight_start":1,"highlight_end":33},{"text":"( left_val , right_val ) => {","highlight_start":1,"highlight_end":30},{"text":"if * left_val == * right_val {","highlight_start":1,"highlight_end":31},{"text":"panic ! (","highlight_start":1,"highlight_end":10},{"text":"r#\"assertion failed: `(left != right)`","highlight_start":1,"highlight_end":39},{"text":"  left: `{:?}`,","highlight_start":1,"highlight_end":16},{"text":" right: `{:?}`\"# ,","highlight_start":1,"highlight_end":19},{"text":"left_val , right_val ) } } } } ) ; ( $ left : expr , $ right : expr , ) => {","highlight_start":1,"highlight_end":77},{"text":"assert_ne ! ( $ left , $ right ) } ; (","highlight_start":1,"highlight_end":39},{"text":"$ left : expr , $ right : expr , $ ( $ arg : tt ) + ) => (","highlight_start":1,"highlight_end":59},{"text":"{","highlight_start":1,"highlight_end":2},{"text":"match ( & ( $ left ) , & ( $ right ) ) {","highlight_start":1,"highlight_end":41},{"text":"( left_val , right_val ) => {","highlight_start":1,"highlight_end":30},{"text":"if * left_val == * right_val {","highlight_start":1,"highlight_end":31},{"text":"panic ! (","highlight_start":1,"highlight_end":10},{"text":"r#\"assertion failed: `(left != right)`","highlight_start":1,"highlight_end":39},{"text":"  left: `{:?}`,","highlight_start":1,"highlight_end":16},{"text":" right: `{:?}`: {}\"# ,","highlight_start":1,"highlight_end":23},{"text":"left_val , right_val , format_args ! ( $ ( $ arg ) + ) ) } } } } ) ;","highlight_start":1,"highlight_end":69}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"format_args!","def_site_span":null}}],"children":[],"rendered":"error: 1 positional argument in format string, but no arguments were given\n  --> /checkout/src/test/ui/macros/macro-comma-behavior.rs:23:23\n   |\nLL |     assert_ne!(1, 2, \"{}\",);\n   |                       ^^\n\n"}
[00:55:58] {"message":"1 positional argument in format string, but no arguments were given","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":830,"byte_end":832,"line_start":29,"line_end":29,"column_start":29,"column_end":31,"is_primary":true,"text":[{"text":"    debug_assert_eq!(1, 1, \"{}\",);","highlight_start":29,"highlight_end":31}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"<::core::macros::assert_eq macros>","byte_start":626,"byte_end":657,"line_start":21,"line_end":21,"column_start":24,"column_end":55,"is_primary":false,"text":[{"text":"left_val , right_val , format_args ! ( $ ( $ arg ) + ) ) } } } } ) ;","highlight_start":24,"highlight_end":55}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"<::core::macros::debug_assert_eq macros>","byte_start":60,"byte_end":91,"line_start":2,"line_end":2,"column_start":33,"column_end":64,"is_primary":false,"text":[{"text":"if cfg ! ( debug_assertions ) { assert_eq ! ( $ ( $ arg ) * ) ; } )","highlight_start":33,"highlight_end":64}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":806,"byte_end":836,"line_start":29,"line_end":29,"column_start":5,"column_end":35,"is_primary":false,"text":[{"text":"    debug_assert_eq!(1, 1, \"{}\",);","highlight_start":5,"highlight_end":35}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"debug_assert_eq!","def_site_span":{"file_name":"<::core::macros::debug_assert_eq macros>","byte_start":0,"byte_end":95,"line_start":1,"line_end":2,"column_start":1,"column_end":68,"is_primary":false,"text":[{"text":"( $ ( $ arg : tt ) * ) => (","highlight_start":1,"highlight_end":28},{"text":"if cfg ! ( debug_assertions ) { assert_eq ! ( $ ( $ arg ) * ) ; } )","highlight_start":1,"highlight_end":68}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"assert_eq!","def_site_span":{"file_name":"<::core::macros::assert_eq macros>","byte_start":0,"byte_end":671,"line_start":1,"line_end":21,"column_start":1,"column_end":69,"is_primary":false,"text":[{"text":"( $ left : expr , $ right : expr ) => (","highlight_start":1,"highlight_end":40},{"text":"{","highlight_start":1,"highlight_end":2},{"text":"match ( & $ left , & $ right ) {","highlight_start":1,"highlight_end":33},{"text":"( left_val , right_val ) => {","highlight_start":1,"highlight_end":30},{"text":"if ! ( * left_val == * right_val ) {","highlight_start":1,"highlight_end":37},{"text":"panic ! (","highlight_start":1,"highlight_end":10},{"text":"r#\"assertion failed: `(left == right)`","highlight_start":1,"highlight_end":39},{"text":"  left: `{:?}`,","highlight_start":1,"highlight_end":16},{"text":" right: `{:?}`\"# ,","highlight_start":1,"highlight_end":19},{"text":"left_val , right_val ) } } } } ) ; ( $ left : expr , $ right : expr , ) => (","highlight_start":1,"highlight_end":77},{"text":"{ assert_eq ! ( $ left , $ right ) } ) ; (","highlight_start":1,"highlight_end":43},{"text":"$ left : expr , $ right : expr , $ ( $ arg : tt ) + ) => (","highlight_start":1,"highlight_end":59},{"text":"{","highlight_start":1,"highlight_end":2},{"text":"match ( & ( $ left ) , & ( $ right ) ) {","highlight_start":1,"highlight_end":41},{"text":"( left_val , right_val ) => {","highlight_start":1,"highlight_end":30},{"text":"if ! ( * left_val == * right_val ) {","highlight_start":1,"highlight_end":37},{"text":"panic ! (","highlight_start":1,"highlight_end":10},{"text":"r#\"assertion failed: `(left == right)`","highlight_start":1,"highlight_end":39},{"text":"  left: `{:?}`,","highlight_start":1,"highlight_end":16},{"text":" right: `{:?}`: {}\"# ,","highlight_start":1,"highlight_end":23},{"text":"left_val , right_val , format_args ! ( $ ( $ arg ) + ) ) } } } } ) ;","highlight_start":1,"highlight_end":69}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"format_args!","def_site_span":null}}],"children":[],"rendered":"error: 1 positional argument in format string, but no arguments were given\n  --> /checkout/src/test/ui/macros/macro-comma-behavior.rs:29:29\n   |\nLL |     debug_assert_eq!(1, 1, \"{}\",);\n   |                             ^^\n\n"}
[00:55:58] thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:495:22
[00:55:58] {"message":"1 positional argument in format string, but no arguments were given","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":933,"byte_end":935,"line_start":32,"line_end":32,"column_start":29,"column_end":31,"is_primary":true,"text":[{"text":"    debug_assert_ne!(1, 2, \"{}\",);","highlight_start":29,"highlight_end":31}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"<::core::macros::assert_ne macros>","byte_start":610,"byte_end":641,"line_start":21,"line_end":21,"column_start":24,"column_end":55,"is_primary":false,"text":[{"text":"left_val , right_val , format_args ! ( $ ( $ arg ) + ) ) } } } } ) ;","highlight_start":24,"highlight_end":55}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"<::core::macros::debug_assert_ne macros>","byte_start":60,"byte_end":91,"line_start":2,"line_end":2,"column_start":33,"column_end":64,"is_primary":false,"text":[{"text":"if cfg ! ( debug_assertions ) { assert_ne ! ( $ ( $ arg ) * ) ; } )","highlight_start":33,"highlight_end":64}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":909,"byte_end":939,"line_start":32,"line_end":32,"column_start":5,"column_end":35,"is_primary":false,"text":[{"text":"    debug_assert_ne!(1, 2, \"{}\",);","highlight_start":5,"highlight_end":35}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"debug_assert_ne!","def_site_span":{"file_name":"<::core::macros::debug_assert_ne macros>","byte_start":0,"byte_end":95,"line_start":1,"line_end":2,"column_start":1,"column_end":68,"is_primary":false,"text":[{"text":"( $ ( $ arg : tt ) * ) => (","highlight_start":1,"highlight_end":28},{"text":"if cfg ! ( debug_assertions ) { assert_ne ! ( $ ( $ arg ) * ) ; } )","highlight_start":1,"highlight_end":68}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"assert_ne!","def_site_span":{"file_name":"<::core::macros::assert_ne macros>","byte_start":0,"byte_end":655,"line_start":1,"line_end":21,"column_start":1,"column_end":69,"is_primary":false,"text":[{"text":"( $ left : expr , $ right : expr ) => (","highlight_start":1,"highlight_end":40},{"text":"{","highlight_start":1,"highlight_end":2},{"text":"match ( & $ left , & $ right ) {","highlight_start":1,"highlight_end":33},{"text":"( left_val , right_val ) => {","highlight_start":1,"highlight_end":30},{"text":"if * left_val == * right_val {","highlight_start":1,"highlight_end":31},{"text":"panic ! (","highlight_start":1,"highlight_end":10},{"text":"r#\"assertion failed: `(left != right)`","highlight_start":1,"highlight_end":39},{"text":"  left: `{:?}`,","highlight_start":1,"highlight_end":16},{"text":" right: `{:?}`\"# ,","highlight_start":1,"highlight_end":19},{"text":"left_val , right_val ) } } } } ) ; ( $ left : expr , $ right : expr , ) => {","highlight_start":1,"highlight_end":77},{"text":"assert_ne ! ( $ left , $ right ) } ; (","highlight_start":1,"highlight_end":39},{"text":"$ left : expr , $ right : expr , $ ( $ arg : tt ) + ) => (","highlight_start":1,"highlight_end":59},{"text":"{","highlight_start":1,"highlight_end":2},{"text":"match ( & ( $ left ) , & ( $ right ) ) {","highlight_start":1,"highlight_end":41},{"text":"( left_val , right_val ) => {","highlight_start":1,"highlight_end":30},{"text":"if * left_val == * right_val {","highlight_start":1,"highlight_end":31},{"text":"panic ! (","highlight_start":1,"highlight_end":10},{"text":"r#\"assertion failed: `(left != right)`","highlight_start":1,"highlight_end":39},{"text":"  left: `{:?}`,","highlight_start":1,"highlight_end":16},{"text":" right: `{:?}`: {}\"# ,","highlight_start":1,"highlight_end":23},{"text":"left_val , right_val , format_args ! ( $ ( $ arg ) + ) ) } } } } ) ;","highlight_start":1,"highlight_end":69}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"format_args!","def_site_span":null}}],"children":[],"rendered":"error: 1 positional argument in format string, but no arguments were given\n  --> /checkout/src/test/ui/macros/macro-comma-behavior.rs:32:29\n   |\nLL |     debug_assert_ne!(1, 2, \"{}\",);\n   |                             ^^\n\n"}
[00:55:58] {"message":"1 positional argument in format string, but no arguments were given","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":1420,"byte_end":1422,"line_start":53,"line_end":53,"column_start":19,"column_end":21,"is_primary":true,"text":[{"text":"    format_args!(\"{}\",);","highlight_start":19,"highlight_end":21}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":1406,"byte_end":1426,"line_start":53,"line_end":53,"column_start":5,"column_end":25,"is_primary":false,"text":[{"text":"    format_args!(\"{}\",);","highlight_start":5,"highlight_end":25}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"format_args!","def_site_span":null}}],"children":[],"rendered":"error: 1 positional argument in format string, but no arguments were given\n  --> /checkout/src/test/ui/macros/macro-comma-behavior.rs:53:19\n   |\nLL |     format_args!(\"{}\",);\n   |                   ^^\n\n"}
[00:55:58] {"message":"1 positional argument in format string, but no arguments were given","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":1876,"byte_end":1878,"line_start":71,"line_end":71,"column_start":21,"column_end":23,"is_primary":true,"text":[{"text":"    unimplemented!(\"{}\",);","highlight_start":21,"highlight_end":23}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"<::core::macros::unimplemented macros>","byte_start":114,"byte_end":145,"line_start":2,"line_end":2,"column_start":39,"column_end":70,"is_primary":false,"text":[{"text":"panic ! ( \"not yet implemented: {}\" , format_args ! ( $ ( $ arg ) * ) ) ) ;","highlight_start":39,"highlight_end":70}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":1860,"byte_end":1882,"line_start":71,"line_end":71,"column_start":5,"column_end":27,"is_primary":false,"text":[{"text":"    unimplemented!(\"{}\",);","highlight_start":5,"highlight_end":27}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"unimplemented!","def_site_span":{"file_name":"<::core::macros::unimplemented macros>","byte_start":0,"byte_end":151,"line_start":1,"line_end":2,"column_start":1,"column_end":76,"is_primary":false,"text":[{"text":"(  ) => ( panic ! ( \"not yet implemented\" ) ) ; ( $ ( $ arg : tt ) + ) => (","highlight_start":1,"highlight_end":76},{"text":"panic ! ( \"not yet implemented: {}\" , format_args ! ( $ ( $ arg ) * ) ) ) ;","highlight_start":1,"highlight_end":76}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"format_args!","def_site_span":null}}],"children":[],"rendered":"error: 1 positional argument in format string, but no arguments were given\n  --> /checkout/src/test/ui/macros/macro-comma-behavior.rs:71:21\n   |\nLL |     unimplemented!(\"{}\",);\n   |                     ^^\n\n"}
[00:55:58] {"message":"1 positional argument in format string, but no arguments were given","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":2143,"byte_end":2145,"line_start":80,"line_end":80,"column_start":24,"column_end":26,"is_primary":true,"text":[{"text":"            write!(f, \"{}\",)?;","highlight_start":24,"highlight_end":26}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"<::core::macros::write macros>","byte_start":63,"byte_end":94,"line_start":2,"line_end":2,"column_start":21,"column_end":52,"is_primary":false,"text":[{"text":"$ dst . write_fmt ( format_args ! ( $ ( $ arg ) * ) ) )","highlight_start":21,"highlight_end":52}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"/checkout/src/test/ui/macros/macro-comma-behavior.rs","byte_start":2132,"byte_end":2148,"line_start":80,"line_end":80,"column_start":13,"column_end":29,"is_primary":false,"text":[{"text":"            write!(f, \"{}\",)?;","highlight_start":13,"highlight_end":29}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"write!","def_site_span":{"file_name":"<::core::macros::write macros>","byte_start":0,"byte_end":98,"line_start":1,"line_end":2,"column_start":1,"column_end":56,"is_primary":false,"text":[{"text":"( $ dst : expr , $ ( $ arg : tt ) * ) => (","highlight_start":1,"highlight_end":43},{"text":"$ dst . write_fmt ( format_args ! ( $ ( $ arg ) * ) ) )","highlight_start":1,"highlight_end":56}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"format_args!","def_site_span":null}}],"children":[],"rendered":"error: 1 positional argument in format string, but no arguments were given\n  --> /checkout/src/test/ui/macros/macro-comma-behavior.rs:80:24\n   |\nLL |             write!(f, \"{}\",)?;\n   |                        ^^\n\n"}
[00:55:58] {"message":"aborting due to 7 previous errors","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to 7 previous errors\n\n"}
[00:55:58] ------------------------------------------
[00:55:58] 
[00:55:58] thread '[ui] ui/macros/macro-comma-behavior.rs#core' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3245:9
[00:55:58] 
---
[00:55:58] test result: FAILED. 5141 passed; 1 failed; 57 ignored; 0 measured; 0 filtered out
[00:55:58] 
[00:55:58] 
[00:55:58] 
[00:55:58] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/wasm32-unknown-unknown/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--stage-id" "stage2-wasm32-unknown-unknown" "--mode" "ui" "--target" "wasm32-unknown-unknown" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/checkout/obj/build/x86_64-unknown-linux-gnu/llvm/build/bin/FileCheck" "--nodejs" "/node-v9.2.0-linux-x64/bin/node" "--host-rustcflags" "-Crpath -O -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Zunstable-options  -Lnative=/checkout/obj/build/wasm32-unknown-unknown/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--llvm-version" "8.0.0svn\n" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--llvm-cxxflags" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
[00:55:58] 
[00:55:58] 
[00:55:58] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test --target wasm32-unknown-unknown src/test/run-make src/test/ui src/test/run-pass src/test/compile-fail src/test/mir-opt src/test/codegen-units src/libcore
[00:55:58] Build completed unsuccessfully in 0:54:02
---
travis_time:end:045d45f8:start=1545888620616685002,finish=1545888620636834473,duration=20149471
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:11f016d5
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:241f0292
travis_time:start:241f0292
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:091b9704
$ dmesg | grep -i kill

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

…ront-end

Fix a number of uncovered deficiencies in diagnostics

petrochenkov · 2018-12-27T13:09:00Z

@bors r=estebank

bors · 2018-12-27T13:09:01Z

📌 Commit bc16ede has been approved by estebank

bors · 2018-12-27T22:27:34Z

⌛ Testing commit bc16ede with merge f8caa32...

AST/HIR: Introduce `ExprKind::Err` for better error recovery in the front-end This way we can avoid aborting compilation if expansion produces errors and generate `ExprKind::Err`s instead.

bors · 2018-12-28T00:59:42Z

☀️ Test successful - status-appveyor, status-travis
Approved by: estebank
Pushing f8caa32 to master...

Match on ast/hir::ExprKind::Err rustup rust-lang/rust#56999

rust-highfive assigned estebank Dec 20, 2018

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petrochenkov force-pushed the macrecov2 branch 2 times, most recently from 737a178 to 4a6aa36 Compare December 21, 2018 00:00

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Dec 21, 2018

Centril mentioned this pull request Dec 22, 2018

Rollup of 41 pull requests #57058

Closed

Centril mentioned this pull request Dec 23, 2018

Rollup of 10 pull requests #57075

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Centril mentioned this pull request Dec 23, 2018

Rollup of 10 pull requests #57083

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bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Dec 24, 2018

petrochenkov force-pushed the macrecov2 branch 2 times, most recently from 9ed057f to fdde6df Compare December 27, 2018 00:13

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Dec 27, 2018

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Dec 27, 2018

bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Dec 27, 2018

petrochenkov added 7 commits December 27, 2018 15:51

AST/HIR: Introduce ExprKind::Err for better error recovery in the f…

a5c52c7

…ront-end

Do not abort compilation if expansion produces errors

fff01cc

Fix a number of uncovered deficiencies in diagnostics

Get rid of Block::recovered

4ac5925

Fix trace_macros and log_syntax

b99fb2f

Make sure feature gate errors are recoverable

15cefe4

Address review comments and CI failures

37af04f

Fix rebase and more CI failures

bc16ede

petrochenkov force-pushed the macrecov2 branch from 9942157 to bc16ede Compare December 27, 2018 13:07

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Dec 27, 2018

bors merged commit bc16ede into rust-lang:master Dec 28, 2018

mati865 mentioned this pull request Dec 28, 2018

Fix if_same_then_else false positive rust-lang/rust-clippy#3590

Merged

flip1995 mentioned this pull request Dec 28, 2018

Match on ast/hir::ExprKind::Err rust-lang/rust-clippy#3591

Merged

bors added a commit to rust-lang/rust-clippy that referenced this pull request Dec 28, 2018

Auto merge of #3591 - flip1995:rustup, r=phansch

32b3bc2

Match on ast/hir::ExprKind::Err rustup rust-lang/rust#56999

jebrosen mentioned this pull request Dec 29, 2018

Update compiler tests for 2018-12-28 nightly. rwf2/Rocket#875

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petrochenkov mentioned this pull request Jan 29, 2019

Poor error message when user forgets derive that has attributes #47608

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petrochenkov deleted the macrecov2 branch June 5, 2019 16:24

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AST/HIR: Introduce `ExprKind::Err` for better error recovery in the front-end #56999

AST/HIR: Introduce `ExprKind::Err` for better error recovery in the front-end #56999

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AST/HIR: Introduce ExprKind::Err for better error recovery in the front-end #56999

AST/HIR: Introduce ExprKind::Err for better error recovery in the front-end #56999

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AST/HIR: Introduce `ExprKind::Err` for better error recovery in the front-end #56999

AST/HIR: Introduce `ExprKind::Err` for better error recovery in the front-end #56999

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