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RalfJungRalfJung
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preserve span when evaluating mir::ConstOperand
1 parent 5ac0b2d commit f24f055

15 files changed

+156
-7
lines changed

‎compiler/rustc_mir_transform/src/dataflow_const_prop.rs

+3-1
Original file line numberDiff line numberDiff line change
@@ -393,7 +393,9 @@ impl<'a, 'tcx> ConstAnalysis<'a, 'tcx> {
393393
}
394394
}
395395
Operand::Constant(box constant) => {
396-
if let Ok(constant) = self.ecx.eval_mir_constant(&constant.const_, None, None) {
396+
if let Ok(constant) =
397+
self.ecx.eval_mir_constant(&constant.const_, Some(constant.span), None)
398+
{
397399
self.assign_constant(state, place, constant, &[]);
398400
}
399401
}

‎compiler/rustc_mir_transform/src/jump_threading.rs

+2-1
Original file line numberDiff line numberDiff line change
@@ -416,7 +416,8 @@ impl<'tcx, 'a> TOFinder<'tcx, 'a> {
416416
match rhs {
417417
// If we expect `lhs ?= A`, we have an opportunity if we assume `constant == A`.
418418
Operand::Constant(constant) => {
419-
let constant = self.ecx.eval_mir_constant(&constant.const_, None, None).ok()?;
419+
let constant =
420+
self.ecx.eval_mir_constant(&constant.const_, Some(constant.span), None).ok()?;
420421
self.process_constant(bb, lhs, constant, state);
421422
}
422423
// Transfer the conditions on the copied rhs.

‎compiler/rustc_monomorphize/src/collector.rs

+5-2
Original file line numberDiff line numberDiff line change
@@ -825,14 +825,17 @@ impl<'a, 'tcx> MirVisitor<'tcx> for MirUsedCollector<'a, 'tcx> {
825825
fn visit_constant(&mut self, constant: &mir::ConstOperand<'tcx>, location: Location) {
826826
let const_ = self.monomorphize(constant.const_);
827827
let param_env = ty::ParamEnv::reveal_all();
828-
let val = match const_.eval(self.tcx, param_env, None) {
828+
let val = match const_.eval(self.tcx, param_env, Some(constant.span)) {
829829
Ok(v) => v,
830-
Err(ErrorHandled::Reported(..)) => return,
831830
Err(ErrorHandled::TooGeneric(..)) => span_bug!(
832831
self.body.source_info(location).span,
833832
"collection encountered polymorphic constant: {:?}",
834833
const_
835834
),
835+
Err(err @ ErrorHandled::Reported(..)) => {
836+
err.emit_note(self.tcx);
837+
return;
838+
}
836839
};
837840
collect_const_value(self.tcx, val, self.output);
838841
MirVisitor::visit_ty(self, const_.ty(), TyContext::Location(location));

‎compiler/rustc_smir/src/rustc_smir/builder.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -56,7 +56,7 @@ impl<'tcx> MutVisitor<'tcx> for BodyBuilder<'tcx> {
5656

5757
fn visit_constant(&mut self, constant: &mut mir::ConstOperand<'tcx>, location: mir::Location) {
5858
let const_ = self.monomorphize(constant.const_);
59-
let val = match const_.eval(self.tcx, ty::ParamEnv::reveal_all(), None) {
59+
let val = match const_.eval(self.tcx, ty::ParamEnv::reveal_all(), Some(constant.span)) {
6060
Ok(v) => v,
6161
Err(mir::interpret::ErrorHandled::Reported(..)) => return,
6262
Err(mir::interpret::ErrorHandled::TooGeneric(..)) => {

‎tests/ui/consts/assoc_const_generic_impl.stderr

+6
Original file line numberDiff line numberDiff line change
@@ -4,6 +4,12 @@ error[E0080]: evaluation of `<u32 as ZeroSized>::I_AM_ZERO_SIZED` failed
44
LL | const I_AM_ZERO_SIZED: () = [()][std::mem::size_of::<Self>()];
55
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ index out of bounds: the length is 1 but the index is 4
66

7+
note: erroneous constant encountered
8+
--> $DIR/assoc_const_generic_impl.rs:11:9
9+
|
10+
LL | Self::I_AM_ZERO_SIZED;
11+
| ^^^^^^^^^^^^^^^^^^^^^
12+
713
note: the above error was encountered while instantiating `fn <u32 as ZeroSized>::requires_zero_size`
814
--> $DIR/assoc_const_generic_impl.rs:18:5
915
|

‎tests/ui/consts/const-eval/index-out-of-bounds-never-type.stderr

+6
Original file line numberDiff line numberDiff line change
@@ -4,6 +4,12 @@ error[E0080]: evaluation of `PrintName::<()>::VOID` failed
44
LL | const VOID: ! = { let x = 0 * std::mem::size_of::<T>(); [][x] };
55
| ^^^^^ index out of bounds: the length is 0 but the index is 0
66

7+
note: erroneous constant encountered
8+
--> $DIR/index-out-of-bounds-never-type.rs:16:13
9+
|
10+
LL | let _ = PrintName::<T>::VOID;
11+
| ^^^^^^^^^^^^^^^^^^^^
12+
713
note: the above error was encountered while instantiating `fn f::<()>`
814
--> $DIR/index-out-of-bounds-never-type.rs:20:5
915
|

‎tests/ui/consts/const-eval/issue-50814-2.mir-opt.stderr

+46
Original file line numberDiff line numberDiff line change
@@ -10,6 +10,52 @@ note: erroneous constant encountered
1010
LL | &<A<T> as Foo<T>>::BAR
1111
| ^^^^^^^^^^^^^^^^^^^^^
1212

13+
note: erroneous constant encountered
14+
--> $DIR/issue-50814-2.rs:20:5
15+
|
16+
LL | &<A<T> as Foo<T>>::BAR
17+
| ^^^^^^^^^^^^^^^^^^^^^^
18+
19+
note: erroneous constant encountered
20+
--> $DIR/issue-50814-2.rs:20:5
21+
|
22+
LL | &<A<T> as Foo<T>>::BAR
23+
| ^^^^^^^^^^^^^^^^^^^^^^
24+
|
25+
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
26+
27+
note: erroneous constant encountered
28+
--> $DIR/issue-50814-2.rs:20:5
29+
|
30+
LL | &<A<T> as Foo<T>>::BAR
31+
| ^^^^^^^^^^^^^^^^^^^^^^
32+
|
33+
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
34+
35+
note: erroneous constant encountered
36+
--> $DIR/issue-50814-2.rs:20:5
37+
|
38+
LL | &<A<T> as Foo<T>>::BAR
39+
| ^^^^^^^^^^^^^^^^^^^^^^
40+
|
41+
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
42+
43+
note: erroneous constant encountered
44+
--> $DIR/issue-50814-2.rs:20:6
45+
|
46+
LL | &<A<T> as Foo<T>>::BAR
47+
| ^^^^^^^^^^^^^^^^^^^^^
48+
|
49+
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
50+
51+
note: erroneous constant encountered
52+
--> $DIR/issue-50814-2.rs:20:6
53+
|
54+
LL | &<A<T> as Foo<T>>::BAR
55+
| ^^^^^^^^^^^^^^^^^^^^^
56+
|
57+
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
58+
1359
error: aborting due to 1 previous error
1460

1561
For more information about this error, try `rustc --explain E0080`.

‎tests/ui/consts/const-eval/issue-50814-2.normal.stderr

+14
Original file line numberDiff line numberDiff line change
@@ -10,6 +10,20 @@ note: erroneous constant encountered
1010
LL | &<A<T> as Foo<T>>::BAR
1111
| ^^^^^^^^^^^^^^^^^^^^^
1212

13+
note: erroneous constant encountered
14+
--> $DIR/issue-50814-2.rs:20:5
15+
|
16+
LL | &<A<T> as Foo<T>>::BAR
17+
| ^^^^^^^^^^^^^^^^^^^^^^
18+
19+
note: erroneous constant encountered
20+
--> $DIR/issue-50814-2.rs:20:6
21+
|
22+
LL | &<A<T> as Foo<T>>::BAR
23+
| ^^^^^^^^^^^^^^^^^^^^^
24+
|
25+
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
26+
1327
note: the above error was encountered while instantiating `fn foo::<()>`
1428
--> $DIR/issue-50814-2.rs:32:22
1529
|

‎tests/ui/consts/const-eval/issue-50814.stderr

+14
Original file line numberDiff line numberDiff line change
@@ -26,6 +26,20 @@ LL | &Sum::<U8, U8>::MAX
2626
|
2727
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
2828

29+
note: erroneous constant encountered
30+
--> $DIR/issue-50814.rs:21:5
31+
|
32+
LL | &Sum::<U8, U8>::MAX
33+
| ^^^^^^^^^^^^^^^^^^^
34+
35+
note: erroneous constant encountered
36+
--> $DIR/issue-50814.rs:21:6
37+
|
38+
LL | &Sum::<U8, U8>::MAX
39+
| ^^^^^^^^^^^^^^^^^^
40+
|
41+
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
42+
2943
note: the above error was encountered while instantiating `fn foo::<i32>`
3044
--> $DIR/issue-50814.rs:26:5
3145
|

‎tests/ui/consts/const-eval/issue-85155.stderr

+8
Original file line numberDiff line numberDiff line change
@@ -4,6 +4,14 @@ error[E0080]: evaluation of `post_monomorphization_error::ValidateConstImm::<2,
44
LL | let _ = 1 / ((IMM >= MIN && IMM <= MAX) as usize);
55
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ attempt to divide `1_usize` by zero
66

7+
note: erroneous constant encountered
8+
--> $DIR/auxiliary/post_monomorphization_error.rs:19:5
9+
|
10+
LL | static_assert_imm1!(IMM1);
11+
| ^^^^^^^^^^^^^^^^^^^^^^^^^
12+
|
13+
= note: this note originates in the macro `static_assert_imm1` (in Nightly builds, run with -Z macro-backtrace for more info)
14+
715
note: the above error was encountered while instantiating `fn post_monomorphization_error::stdarch_intrinsic::<2>`
816
--> $DIR/issue-85155.rs:19:5
917
|

‎tests/ui/consts/const-eval/unused-broken-const-late.stderr

+6
Original file line numberDiff line numberDiff line change
@@ -6,6 +6,12 @@ LL | const VOID: () = panic!();
66
|
77
= note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
88

9+
note: erroneous constant encountered
10+
--> $DIR/unused-broken-const-late.rs:15:17
11+
|
12+
LL | let _ = PrintName::<T>::VOID;
13+
| ^^^^^^^^^^^^^^^^^^^^
14+
915
error: aborting due to 1 previous error
1016

1117
For more information about this error, try `rustc --explain E0080`.

‎tests/ui/generics/post_monomorphization_error_backtrace.rs

+3
Original file line numberDiff line numberDiff line change
@@ -12,6 +12,9 @@ fn assert_zst<T>() {
1212
//~| NOTE: the evaluated program panicked
1313
}
1414
F::<T>::V;
15+
//~^NOTE: erroneous constant
16+
//~|NOTE: erroneous constant
17+
//~|NOTE: duplicate
1518
}
1619

1720
fn foo<U>() {

‎tests/ui/generics/post_monomorphization_error_backtrace.stderr

+16-2
Original file line numberDiff line numberDiff line change
@@ -6,8 +6,14 @@ LL | const V: () = assert!(std::mem::size_of::<T>() == 0);
66
|
77
= note: this error originates in the macro `assert` (in Nightly builds, run with -Z macro-backtrace for more info)
88

9+
note: erroneous constant encountered
10+
--> $DIR/post_monomorphization_error_backtrace.rs:14:5
11+
|
12+
LL | F::<T>::V;
13+
| ^^^^^^^^^
14+
915
note: the above error was encountered while instantiating `fn assert_zst::<u32>`
10-
--> $DIR/post_monomorphization_error_backtrace.rs:18:5
16+
--> $DIR/post_monomorphization_error_backtrace.rs:21:5
1117
|
1218
LL | assert_zst::<U>()
1319
| ^^^^^^^^^^^^^^^^^
@@ -20,8 +26,16 @@ LL | const V: () = assert!(std::mem::size_of::<T>() == 0);
2026
|
2127
= note: this error originates in the macro `assert` (in Nightly builds, run with -Z macro-backtrace for more info)
2228

29+
note: erroneous constant encountered
30+
--> $DIR/post_monomorphization_error_backtrace.rs:14:5
31+
|
32+
LL | F::<T>::V;
33+
| ^^^^^^^^^
34+
|
35+
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
36+
2337
note: the above error was encountered while instantiating `fn assert_zst::<i32>`
24-
--> $DIR/post_monomorphization_error_backtrace.rs:18:5
38+
--> $DIR/post_monomorphization_error_backtrace.rs:21:5
2539
|
2640
LL | assert_zst::<U>()
2741
| ^^^^^^^^^^^^^^^^^

‎tests/ui/inline-const/const-expr-generic-err.stderr

+20
Original file line numberDiff line numberDiff line change
@@ -6,6 +6,12 @@ LL | const { assert!(std::mem::size_of::<T>() == 0); }
66
|
77
= note: this error originates in the macro `assert` (in Nightly builds, run with -Z macro-backtrace for more info)
88

9+
note: erroneous constant encountered
10+
--> $DIR/const-expr-generic-err.rs:5:5
11+
|
12+
LL | const { assert!(std::mem::size_of::<T>() == 0); }
13+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
14+
915
note: the above error was encountered while instantiating `fn foo::<i32>`
1016
--> $DIR/const-expr-generic-err.rs:13:5
1117
|
@@ -18,6 +24,20 @@ error[E0080]: evaluation of `bar::<0>::{constant#0}` failed
1824
LL | const { N - 1 }
1925
| ^^^^^ attempt to compute `0_usize - 1_usize`, which would overflow
2026

27+
note: erroneous constant encountered
28+
--> $DIR/const-expr-generic-err.rs:9:5
29+
|
30+
LL | const { N - 1 }
31+
| ^^^^^^^^^^^^^^^
32+
33+
note: erroneous constant encountered
34+
--> $DIR/const-expr-generic-err.rs:9:5
35+
|
36+
LL | const { N - 1 }
37+
| ^^^^^^^^^^^^^^^
38+
|
39+
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
40+
2141
note: the above error was encountered while instantiating `fn bar::<0>`
2242
--> $DIR/const-expr-generic-err.rs:14:5
2343
|

‎tests/ui/inline-const/required-const.stderr

+6
Original file line numberDiff line numberDiff line change
@@ -6,6 +6,12 @@ LL | const { panic!() }
66
|
77
= note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
88

9+
note: erroneous constant encountered
10+
--> $DIR/required-const.rs:7:9
11+
|
12+
LL | const { panic!() }
13+
| ^^^^^^^^^^^^^^^^^^
14+
915
error: aborting due to 1 previous error
1016

1117
For more information about this error, try `rustc --explain E0080`.

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