Rollup of 11 pull requests

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -2,7 +2,7 @@ use rustc_data_structures::fx::FxHashSet;
 use rustc_data_structures::temp_dir::MaybeTempDir;
 use rustc_fs_util::fix_windows_verbatim_for_gcc;
 use rustc_hir::def_id::CrateNum;
-use rustc_middle::middle::cstore::{EncodedMetadata, LibSource, NativeLib};
+use rustc_middle::middle::cstore::{EncodedMetadata, LibSource};
 use rustc_middle::middle::dependency_format::Linkage;
 use rustc_session::config::{self, CFGuard, CrateType, DebugInfo};
 use rustc_session::config::{OutputFilenames, OutputType, PrintRequest, SanitizerSet};
@@ -22,7 +22,8 @@ use super::command::Command;
 use super::linker::{self, Linker};
 use super::rpath::{self, RPathConfig};
 use crate::{
-    looks_like_rust_object_file, CodegenResults, CompiledModule, CrateInfo, METADATA_FILENAME,
+    looks_like_rust_object_file, CodegenResults, CompiledModule, CrateInfo, NativeLib,
+    METADATA_FILENAME,
 };
 
 use cc::windows_registry;

compiler/rustc_codegen_ssa/src/base.rs

@@ -766,7 +766,7 @@ impl CrateInfo {
             profiler_runtime: None,
             is_no_builtins: Default::default(),
             native_libraries: Default::default(),
-            used_libraries: tcx.native_libraries(LOCAL_CRATE),
+            used_libraries: tcx.native_libraries(LOCAL_CRATE).iter().map(Into::into).collect(),
             link_args: tcx.link_args(LOCAL_CRATE),
             crate_name: Default::default(),
             used_crates_dynamic: cstore::used_crates(tcx, LinkagePreference::RequireDynamic),
@@ -787,7 +787,8 @@ impl CrateInfo {
         info.missing_lang_items.reserve(n_crates);
 
         for &cnum in crates.iter() {
-            info.native_libraries.insert(cnum, tcx.native_libraries(cnum));
+            info.native_libraries
+                .insert(cnum, tcx.native_libraries(cnum).iter().map(Into::into).collect());
             info.crate_name.insert(cnum, tcx.crate_name(cnum).to_string());
             info.used_crate_source.insert(cnum, tcx.used_crate_source(cnum));
             if tcx.is_panic_runtime(cnum) {

compiler/rustc_codegen_ssa/src/lib.rs

@@ -21,15 +21,17 @@ extern crate tracing;
 #[macro_use]
 extern crate rustc_middle;
 
+use rustc_ast as ast;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::sync::Lrc;
 use rustc_hir::def_id::CrateNum;
 use rustc_hir::LangItem;
 use rustc_middle::dep_graph::WorkProduct;
-use rustc_middle::middle::cstore::{CrateSource, LibSource, NativeLib};
+use rustc_middle::middle::cstore::{self, CrateSource, LibSource};
 use rustc_middle::middle::dependency_format::Dependencies;
 use rustc_middle::ty::query::Providers;
 use rustc_session::config::{OutputFilenames, OutputType, RUST_CGU_EXT};
+use rustc_session::utils::NativeLibKind;
 use rustc_span::symbol::Symbol;
 use std::path::{Path, PathBuf};
 
@@ -105,6 +107,19 @@ bitflags::bitflags! {
     }
 }
 
+#[derive(Clone, Debug, Encodable, Decodable, HashStable)]
+pub struct NativeLib {
+    pub kind: NativeLibKind,
+    pub name: Option<Symbol>,
+    pub cfg: Option<ast::MetaItem>,
+}
+
+impl From<&cstore::NativeLib> for NativeLib {
+    fn from(lib: &cstore::NativeLib) -> Self {
+        NativeLib { kind: lib.kind.clone(), name: lib.name.clone(), cfg: lib.cfg.clone() }
+    }
+}
+
 /// Misc info we load from metadata to persist beyond the tcx.
 ///
 /// Note: though `CrateNum` is only meaningful within the same tcx, information within `CrateInfo`
@@ -119,9 +134,9 @@ pub struct CrateInfo {
     pub compiler_builtins: Option<CrateNum>,
     pub profiler_runtime: Option<CrateNum>,
     pub is_no_builtins: FxHashSet<CrateNum>,
-    pub native_libraries: FxHashMap<CrateNum, Lrc<Vec<NativeLib>>>,
+    pub native_libraries: FxHashMap<CrateNum, Vec<NativeLib>>,
     pub crate_name: FxHashMap<CrateNum, String>,
-    pub used_libraries: Lrc<Vec<NativeLib>>,
+    pub used_libraries: Vec<NativeLib>,
     pub link_args: Lrc<Vec<String>>,
     pub used_crate_source: FxHashMap<CrateNum, Lrc<CrateSource>>,
     pub used_crates_static: Vec<(CrateNum, LibSource)>,

compiler/rustc_expand/src/mbe.rs

@@ -84,7 +84,7 @@ enum TokenTree {
     /// e.g., `$var`
     MetaVar(Span, Ident),
     /// e.g., `$var:expr`. This is only used in the left hand side of MBE macros.
-    MetaVarDecl(Span, Ident /* name to bind */, NonterminalKind),
+    MetaVarDecl(Span, Ident /* name to bind */, Option<NonterminalKind>),
 }
 
 impl TokenTree {

compiler/rustc_expand/src/mbe/macro_parser.rs

@@ -378,6 +378,11 @@ fn nameize<I: Iterator<Item = NamedMatch>>(
                     n_rec(sess, next_m, res.by_ref(), ret_val)?;
                 }
             }
+            TokenTree::MetaVarDecl(span, _, None) => {
+                if sess.missing_fragment_specifiers.borrow_mut().remove(&span).is_some() {
+                    return Err((span, "missing fragment specifier".to_string()));
+                }
+            }
             TokenTree::MetaVarDecl(sp, bind_name, _) => match ret_val
                 .entry(MacroRulesNormalizedIdent::new(bind_name))
             {
@@ -446,6 +451,7 @@ fn or_pat_mode(edition: Edition) -> OrPatNonterminalMode {
 ///
 /// A `ParseResult`. Note that matches are kept track of through the items generated.
 fn inner_parse_loop<'root, 'tt>(
+    sess: &ParseSess,
     cur_items: &mut SmallVec<[MatcherPosHandle<'root, 'tt>; 1]>,
     next_items: &mut Vec<MatcherPosHandle<'root, 'tt>>,
     eof_items: &mut SmallVec<[MatcherPosHandle<'root, 'tt>; 1]>,
@@ -563,9 +569,16 @@ fn inner_parse_loop<'root, 'tt>(
                     })));
                 }
 
+                // We need to match a metavar (but the identifier is invalid)... this is an error
+                TokenTree::MetaVarDecl(span, _, None) => {
+                    if sess.missing_fragment_specifiers.borrow_mut().remove(&span).is_some() {
+                        return Error(span, "missing fragment specifier".to_string());
+                    }
+                }
+
                 // We need to match a metavar with a valid ident... call out to the black-box
                 // parser by adding an item to `bb_items`.
-                TokenTree::MetaVarDecl(span, _, kind) => {
+                TokenTree::MetaVarDecl(span, _, Some(kind)) => {
                     // Built-in nonterminals never start with these tokens, so we can eliminate
                     // them from consideration.
                     //
@@ -640,6 +653,7 @@ pub(super) fn parse_tt(parser: &mut Cow<'_, Parser<'_>>, ms: &[TokenTree]) -> Na
         // parsing from the black-box parser done. The result is that `next_items` will contain a
         // bunch of possible next matcher positions in `next_items`.
         match inner_parse_loop(
+            parser.sess,
             &mut cur_items,
             &mut next_items,
             &mut eof_items,
@@ -701,7 +715,7 @@ pub(super) fn parse_tt(parser: &mut Cow<'_, Parser<'_>>, ms: &[TokenTree]) -> Na
             let nts = bb_items
                 .iter()
                 .map(|item| match item.top_elts.get_tt(item.idx) {
-                    TokenTree::MetaVarDecl(_, bind, kind) => format!("{} ('{}')", kind, bind),
+                    TokenTree::MetaVarDecl(_, bind, Some(kind)) => format!("{} ('{}')", kind, bind),
                     _ => panic!(),
                 })
                 .collect::<Vec<String>>()
@@ -731,7 +745,7 @@ pub(super) fn parse_tt(parser: &mut Cow<'_, Parser<'_>>, ms: &[TokenTree]) -> Na
             assert_eq!(bb_items.len(), 1);
 
             let mut item = bb_items.pop().unwrap();
-            if let TokenTree::MetaVarDecl(span, _, kind) = item.top_elts.get_tt(item.idx) {
+            if let TokenTree::MetaVarDecl(span, _, Some(kind)) = item.top_elts.get_tt(item.idx) {
                 let match_cur = item.match_cur;
                 // We use the span of the metavariable declaration to determine any
                 // edition-specific matching behavior for non-terminals.

compiler/rustc_expand/src/mbe/macro_rules.rs

@@ -401,7 +401,7 @@ pub fn compile_declarative_macro(
     let diag = &sess.parse_sess.span_diagnostic;
     let lhs_nm = Ident::new(sym::lhs, def.span);
     let rhs_nm = Ident::new(sym::rhs, def.span);
-    let tt_spec = NonterminalKind::TT;
+    let tt_spec = Some(NonterminalKind::TT);
 
     // Parse the macro_rules! invocation
     let (macro_rules, body) = match &def.kind {
@@ -578,7 +578,7 @@ fn check_lhs_no_empty_seq(sess: &ParseSess, tts: &[mbe::TokenTree]) -> bool {
             TokenTree::Sequence(span, ref seq) => {
                 if seq.separator.is_none()
                     && seq.tts.iter().all(|seq_tt| match *seq_tt {
-                        TokenTree::MetaVarDecl(_, _, NonterminalKind::Vis) => true,
+                        TokenTree::MetaVarDecl(_, _, Some(NonterminalKind::Vis)) => true,
                         TokenTree::Sequence(_, ref sub_seq) => {
                             sub_seq.kleene.op == mbe::KleeneOp::ZeroOrMore
                                 || sub_seq.kleene.op == mbe::KleeneOp::ZeroOrOne
@@ -961,7 +961,7 @@ fn check_matcher_core(
         // Now `last` holds the complete set of NT tokens that could
         // end the sequence before SUFFIX. Check that every one works with `suffix`.
         for token in &last.tokens {
-            if let TokenTree::MetaVarDecl(_, name, kind) = *token {
+            if let TokenTree::MetaVarDecl(_, name, Some(kind)) = *token {
                 for next_token in &suffix_first.tokens {
                     match is_in_follow(next_token, kind) {
                         IsInFollow::Yes => {}
@@ -1019,7 +1019,7 @@ fn check_matcher_core(
 }
 
 fn token_can_be_followed_by_any(tok: &mbe::TokenTree) -> bool {
-    if let mbe::TokenTree::MetaVarDecl(_, _, kind) = *tok {
+    if let mbe::TokenTree::MetaVarDecl(_, _, Some(kind)) = *tok {
         frag_can_be_followed_by_any(kind)
     } else {
         // (Non NT's can always be followed by anything in matchers.)
@@ -1123,7 +1123,7 @@ fn is_in_follow(tok: &mbe::TokenTree, kind: NonterminalKind) -> IsInFollow {
                         }
                         _ => IsInFollow::No(TOKENS),
                     },
-                    TokenTree::MetaVarDecl(_, _, NonterminalKind::Block) => IsInFollow::Yes,
+                    TokenTree::MetaVarDecl(_, _, Some(NonterminalKind::Block)) => IsInFollow::Yes,
                     _ => IsInFollow::No(TOKENS),
                 }
             }
@@ -1158,7 +1158,7 @@ fn is_in_follow(tok: &mbe::TokenTree, kind: NonterminalKind) -> IsInFollow {
                     TokenTree::MetaVarDecl(
                         _,
                         _,
-                        NonterminalKind::Ident | NonterminalKind::Ty | NonterminalKind::Path,
+                        Some(NonterminalKind::Ident | NonterminalKind::Ty | NonterminalKind::Path),
                     ) => IsInFollow::Yes,
                     _ => IsInFollow::No(TOKENS),
                 }
@@ -1171,7 +1171,8 @@ fn quoted_tt_to_string(tt: &mbe::TokenTree) -> String {
     match *tt {
         mbe::TokenTree::Token(ref token) => pprust::token_to_string(&token),
         mbe::TokenTree::MetaVar(_, name) => format!("${}", name),
-        mbe::TokenTree::MetaVarDecl(_, name, kind) => format!("${}:{}", name, kind),
+        mbe::TokenTree::MetaVarDecl(_, name, Some(kind)) => format!("${}:{}", name, kind),
+        mbe::TokenTree::MetaVarDecl(_, name, None) => format!("${}:", name),
         _ => panic!(
             "{}",
             "unexpected mbe::TokenTree::{Sequence or Delimited} \

compiler/rustc_expand/src/mbe/quoted.rs

@@ -3,7 +3,7 @@ use crate::mbe::{Delimited, KleeneOp, KleeneToken, SequenceRepetition, TokenTree
 
 use rustc_ast::token::{self, Token};
 use rustc_ast::tokenstream;
-use rustc_ast::NodeId;
+use rustc_ast::{NodeId, DUMMY_NODE_ID};
 use rustc_ast_pretty::pprust;
 use rustc_session::parse::ParseSess;
 use rustc_span::symbol::{kw, Ident};
@@ -73,7 +73,7 @@ pub(super) fn parse(
                                                 .emit();
                                             token::NonterminalKind::Ident
                                         });
-                                    result.push(TokenTree::MetaVarDecl(span, ident, kind));
+                                    result.push(TokenTree::MetaVarDecl(span, ident, Some(kind)));
                                     continue;
                                 }
                                 _ => token.span,
@@ -83,8 +83,11 @@ pub(super) fn parse(
                     }
                     tree => tree.as_ref().map(tokenstream::TokenTree::span).unwrap_or(start_sp),
                 };
-                sess.span_diagnostic.struct_span_err(span, "missing fragment specifier").emit();
-                continue;
+                if node_id != DUMMY_NODE_ID {
+                    // Macros loaded from other crates have dummy node ids.
+                    sess.missing_fragment_specifiers.borrow_mut().insert(span, node_id);
+                }
+                result.push(TokenTree::MetaVarDecl(span, ident, None));
             }
 
             // Not a metavar or no matchers allowed, so just return the tree

compiler/rustc_interface/src/passes.rs

@@ -29,6 +29,7 @@ use rustc_passes::{self, hir_stats, layout_test};
 use rustc_plugin_impl as plugin;
 use rustc_resolve::{Resolver, ResolverArenas};
 use rustc_session::config::{CrateType, Input, OutputFilenames, OutputType, PpMode, PpSourceMode};
+use rustc_session::lint;
 use rustc_session::output::{filename_for_input, filename_for_metadata};
 use rustc_session::search_paths::PathKind;
 use rustc_session::Session;
@@ -306,11 +307,27 @@ fn configure_and_expand_inner<'a>(
             ecx.check_unused_macros();
         });
 
+        let mut missing_fragment_specifiers: Vec<_> = ecx
+            .sess
+            .parse_sess
+            .missing_fragment_specifiers
+            .borrow()
+            .iter()
+            .map(|(span, node_id)| (*span, *node_id))
+            .collect();
+        missing_fragment_specifiers.sort_unstable_by_key(|(span, _)| *span);
+
+        let recursion_limit_hit = ecx.reduced_recursion_limit.is_some();
+
+        for (span, node_id) in missing_fragment_specifiers {
+            let lint = lint::builtin::MISSING_FRAGMENT_SPECIFIER;
+            let msg = "missing fragment specifier";
+            resolver.lint_buffer().buffer_lint(lint, node_id, span, msg);
+        }
         if cfg!(windows) {
             env::set_var("PATH", &old_path);
         }
 
-        let recursion_limit_hit = ecx.reduced_recursion_limit.is_some();
         if recursion_limit_hit {
             // If we hit a recursion limit, exit early to avoid later passes getting overwhelmed
             // with a large AST

compiler/rustc_lint/src/levels.rs

@@ -12,7 +12,9 @@ use rustc_hir::{intravisit, HirId};
 use rustc_middle::hir::map::Map;
 use rustc_middle::lint::LevelSource;
 use rustc_middle::lint::LintDiagnosticBuilder;
-use rustc_middle::lint::{struct_lint_level, LintLevelMap, LintLevelSets, LintSet, LintSource};
+use rustc_middle::lint::{
+    struct_lint_level, LintLevelMap, LintLevelSets, LintLevelSource, LintSet,
+};
 use rustc_middle::ty::query::Providers;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::lint::{builtin, Level, Lint, LintId};
@@ -91,7 +93,7 @@ impl<'s> LintLevelsBuilder<'s> {
             };
             for id in ids {
                 self.check_gated_lint(id, DUMMY_SP);
-                let src = LintSource::CommandLine(lint_flag_val, orig_level);
+                let src = LintLevelSource::CommandLine(lint_flag_val, orig_level);
                 specs.insert(id, (level, src));
             }
         }
@@ -128,19 +130,19 @@ impl<'s> LintLevelsBuilder<'s> {
                 );
                 diag_builder.span_label(src.span(), "overruled by previous forbid");
                 match old_src {
-                    LintSource::Default => {
+                    LintLevelSource::Default => {
                         diag_builder.note(&format!(
                             "`forbid` lint level is the default for {}",
                             id.to_string()
                         ));
                     }
-                    LintSource::Node(_, forbid_source_span, reason) => {
+                    LintLevelSource::Node(_, forbid_source_span, reason) => {
                         diag_builder.span_label(forbid_source_span, "`forbid` level set here");
                         if let Some(rationale) = reason {
                             diag_builder.note(&rationale.as_str());
                         }
                     }
-                    LintSource::CommandLine(_, _) => {
+                    LintLevelSource::CommandLine(_, _) => {
                         diag_builder.note("`forbid` lint level was set on command line");
                     }
                 }
@@ -276,7 +278,7 @@ impl<'s> LintLevelsBuilder<'s> {
                 let name = meta_item.path.segments.last().expect("empty lint name").ident.name;
                 match store.check_lint_name(&name.as_str(), tool_name) {
                     CheckLintNameResult::Ok(ids) => {
-                        let src = LintSource::Node(name, li.span(), reason);
+                        let src = LintLevelSource::Node(name, li.span(), reason);
                         for &id in ids {
                             self.check_gated_lint(id, attr.span);
                             self.insert_spec(&mut specs, id, (level, src));
@@ -287,7 +289,7 @@ impl<'s> LintLevelsBuilder<'s> {
                         match result {
                             Ok(ids) => {
                                 let complete_name = &format!("{}::{}", tool_name.unwrap(), name);
-                                let src = LintSource::Node(
+                                let src = LintLevelSource::Node(
                                     Symbol::intern(complete_name),
                                     li.span(),
                                     reason,
@@ -324,7 +326,7 @@ impl<'s> LintLevelsBuilder<'s> {
                                     },
                                 );
 
-                                let src = LintSource::Node(
+                                let src = LintLevelSource::Node(
                                     Symbol::intern(&new_lint_name),
                                     li.span(),
                                     reason,
@@ -403,7 +405,7 @@ impl<'s> LintLevelsBuilder<'s> {
                 }
 
                 let (lint_attr_name, lint_attr_span) = match *src {
-                    LintSource::Node(name, span, _) => (name, span),
+                    LintLevelSource::Node(name, span, _) => (name, span),
                     _ => continue,
                 };
 
@@ -460,7 +462,7 @@ impl<'s> LintLevelsBuilder<'s> {
     }
 
     /// Find the lint level for a lint.
-    pub fn lint_level(&self, lint: &'static Lint) -> (Level, LintSource) {
+    pub fn lint_level(&self, lint: &'static Lint) -> (Level, LintLevelSource) {
         self.sets.get_lint_level(lint, self.cur, None, self.sess)
     }
 

compiler/rustc_lint/src/lib.rs

@@ -70,7 +70,7 @@ use rustc_middle::ty::TyCtxt;
 use rustc_session::lint::builtin::{
     BARE_TRAIT_OBJECTS, BROKEN_INTRA_DOC_LINKS, ELIDED_LIFETIMES_IN_PATHS,
     EXPLICIT_OUTLIVES_REQUIREMENTS, INVALID_CODEBLOCK_ATTRIBUTES, INVALID_HTML_TAGS,
-    MISSING_DOC_CODE_EXAMPLES, NON_AUTOLINKS, PRIVATE_DOC_TESTS,
+    INVALID_RUST_CODEBLOCK, MISSING_DOC_CODE_EXAMPLES, NON_AUTOLINKS, PRIVATE_DOC_TESTS,
 };
 use rustc_span::symbol::{Ident, Symbol};
 use rustc_span::Span;
@@ -319,6 +319,7 @@ fn register_builtins(store: &mut LintStore, no_interleave_lints: bool) {
         BROKEN_INTRA_DOC_LINKS,
         PRIVATE_INTRA_DOC_LINKS,
         INVALID_CODEBLOCK_ATTRIBUTES,
+        INVALID_RUST_CODEBLOCK,
         MISSING_DOC_CODE_EXAMPLES,
         PRIVATE_DOC_TESTS,
         INVALID_HTML_TAGS