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Auto merge of rust-lang#142008 - RalfJung:const-eval-error-here, r=oli-obk
const-eval error: always say in which item the error occurred I don't see why "is this generic" should make a difference. It may be reasonable to key this on whether the error occurs in a `const fn` that was invoked by a const (making it non-obvious which constant it is) vs inside the body of the const. r? `@oli-obk`
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‎compiler/rustc_const_eval/messages.ftl

Lines changed: 3 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -88,11 +88,9 @@ const_eval_division_overflow =
8888
const_eval_dyn_call_not_a_method =
8989
`dyn` call trying to call something that is not a method
9090
91-
const_eval_error = {$error_kind ->
92-
[static] evaluation of static initializer failed here
93-
[const] evaluation of constant value failed here
94-
[const_with_path] evaluation of `{$instance}` failed here
95-
*[other] {""}
91+
const_eval_error = evaluation of `{$instance}` failed {$num_frames ->
92+
[0] here
93+
*[other] inside this call
9694
}
9795
9896
const_eval_exact_div_has_remainder =

‎compiler/rustc_const_eval/src/const_eval/eval_queries.rs

Lines changed: 3 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -430,27 +430,15 @@ fn report_eval_error<'tcx>(
430430
let (error, backtrace) = error.into_parts();
431431
backtrace.print_backtrace();
432432

433-
let (kind, instance) = if ecx.tcx.is_static(cid.instance.def_id()) {
434-
("static", String::new())
435-
} else {
436-
// If the current item has generics, we'd like to enrich the message with the
437-
// instance and its args: to show the actual compile-time values, in addition to
438-
// the expression, leading to the const eval error.
439-
let instance = &cid.instance;
440-
if !instance.args.is_empty() {
441-
let instance = with_no_trimmed_paths!(instance.to_string());
442-
("const_with_path", instance)
443-
} else {
444-
("const", String::new())
445-
}
446-
};
433+
let instance = with_no_trimmed_paths!(cid.instance.to_string());
447434

448435
super::report(
449436
*ecx.tcx,
450437
error,
451438
DUMMY_SP,
452439
|| super::get_span_and_frames(ecx.tcx, ecx.stack()),
453440
|diag, span, frames| {
441+
let num_frames = frames.len();
454442
// FIXME(oli-obk): figure out how to use structured diagnostics again.
455443
diag.code(E0080);
456444
diag.span_label(span, crate::fluent_generated::const_eval_error);
@@ -459,7 +447,7 @@ fn report_eval_error<'tcx>(
459447
}
460448
// Add after the frame rendering above, as it adds its own `instance` args.
461449
diag.arg("instance", instance);
462-
diag.arg("error_kind", kind);
450+
diag.arg("num_frames", num_frames);
463451
},
464452
)
465453
}

‎src/tools/miri/tests/fail/const-ub-checks.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: accessing memory based on pointer with alignment ALIGN, but alignm
22
--> tests/fail/const-ub-checks.rs:LL:CC
33
|
44
LL | ptr.read();
5-
| ^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^ evaluation of `UNALIGNED_READ` failed here
66

77
note: erroneous constant encountered
88
--> tests/fail/const-ub-checks.rs:LL:CC

‎src/tools/miri/tests/fail/erroneous_const2.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: attempt to compute `5_u32 - 6_u32`, which would overflow
22
--> tests/fail/erroneous_const2.rs:LL:CC
33
|
44
LL | const FOO: u32 = [X - Y, Y - X][(X < Y) as usize];
5-
| ^^^^^ evaluation of constant value failed here
5+
| ^^^^^ evaluation of `FOO` failed here
66

77
note: erroneous constant encountered
88
--> tests/fail/erroneous_const2.rs:LL:CC

‎tests/rustdoc-ui/const-evalutation-ice.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: attempt to compute `0_usize - 1_usize`, which would overflow
22
--> $DIR/const-evalutation-ice.rs:10:22
33
|
44
LL | pub const N: usize = 0 - (mem::size_of::<S>() != 400) as usize;
5-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `N` failed here
66

77
error: aborting due to 1 previous error
88

‎tests/ui/array-slice-vec/array_const_index-0.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: index out of bounds: the length is 0 but the index is 1
22
--> $DIR/array_const_index-0.rs:2:16
33
|
44
LL | const B: i32 = (&A)[1];
5-
| ^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^ evaluation of `B` failed here
66

77
error: aborting due to 1 previous error
88

‎tests/ui/array-slice-vec/array_const_index-1.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: index out of bounds: the length is 0 but the index is 1
22
--> $DIR/array_const_index-1.rs:2:16
33
|
44
LL | const B: i32 = A[1];
5-
| ^^^^ evaluation of constant value failed here
5+
| ^^^^ evaluation of `B` failed here
66

77
error: aborting due to 1 previous error
88

‎tests/ui/borrowck/issue-81899.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: evaluation panicked: explicit panic
22
--> $DIR/issue-81899.rs:6:24
33
|
44
LL | const _CONST: &[u8] = &f(&[], |_| {});
5-
| ^^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^^ evaluation of `_CONST` failed inside this call
66
|
77
note: inside `f::<{closure@$DIR/issue-81899.rs:6:31: 6:34}>`
88
--> $DIR/issue-81899.rs:13:5

‎tests/ui/borrowck/issue-88434-minimal-example.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: evaluation panicked: explicit panic
22
--> $DIR/issue-88434-minimal-example.rs:5:22
33
|
44
LL | const _CONST: &() = &f(&|_| {});
5-
| ^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^ evaluation of `_CONST` failed inside this call
66
|
77
note: inside `f::<{closure@$DIR/issue-88434-minimal-example.rs:5:25: 5:28}>`
88
--> $DIR/issue-88434-minimal-example.rs:12:5

‎tests/ui/borrowck/issue-88434-removal-index-should-be-less.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: evaluation panicked: explicit panic
22
--> $DIR/issue-88434-removal-index-should-be-less.rs:5:24
33
|
44
LL | const _CONST: &[u8] = &f(&[], |_| {});
5-
| ^^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^^ evaluation of `_CONST` failed inside this call
66
|
77
note: inside `f::<{closure@$DIR/issue-88434-removal-index-should-be-less.rs:5:31: 5:34}>`
88
--> $DIR/issue-88434-removal-index-should-be-less.rs:12:5

‎tests/ui/coherence/const-errs-dont-conflict-103369.stderr

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: evaluation panicked: Some error occurred
22
--> $DIR/const-errs-dont-conflict-103369.rs:5:25
33
|
44
LL | impl ConstGenericTrait<{my_fn(1)}> for () {}
5-
| ^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^ evaluation of `<() as ConstGenericTrait<{my_fn(1)}>>::{constant#0}` failed inside this call
66
|
77
note: inside `my_fn`
88
--> $DIR/const-errs-dont-conflict-103369.rs:10:5
@@ -14,7 +14,7 @@ error[E0080]: evaluation panicked: Some error occurred
1414
--> $DIR/const-errs-dont-conflict-103369.rs:7:25
1515
|
1616
LL | impl ConstGenericTrait<{my_fn(2)}> for () {}
17-
| ^^^^^^^^ evaluation of constant value failed here
17+
| ^^^^^^^^ evaluation of `<() as ConstGenericTrait<{my_fn(2)}>>::{constant#0}` failed inside this call
1818
|
1919
note: inside `my_fn`
2020
--> $DIR/const-errs-dont-conflict-103369.rs:10:5

‎tests/ui/const-generics/defaults/default-param-wf-concrete.next.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: attempt to compute `u8::MAX + 1_u8`, which would overflow
22
--> $DIR/default-param-wf-concrete.rs:4:28
33
|
44
LL | struct Foo<const N: u8 = { 255 + 1 }>;
5-
| ^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^ evaluation of `Foo::{constant#0}` failed here
66

77
error: aborting due to 1 previous error
88

‎tests/ui/const-generics/defaults/default-param-wf-concrete.old.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: attempt to compute `u8::MAX + 1_u8`, which would overflow
22
--> $DIR/default-param-wf-concrete.rs:4:28
33
|
44
LL | struct Foo<const N: u8 = { 255 + 1 }>;
5-
| ^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^ evaluation of `Foo::{constant#0}` failed here
66

77
error: aborting due to 1 previous error
88

‎tests/ui/const-generics/defaults/wfness.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: attempt to compute `u8::MAX + 1_u8`, which would overflow
22
--> $DIR/wfness.rs:1:33
33
|
44
LL | struct Ooopsies<const N: u8 = { u8::MAX + 1 }>;
5-
| ^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^ evaluation of `Ooopsies::{constant#0}` failed here
66

77
error[E0277]: the trait bound `(): Trait<2>` is not satisfied
88
--> $DIR/wfness.rs:8:9

‎tests/ui/const-generics/issues/issue-100313.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: writing to ALLOC0 which is read-only
22
--> $DIR/issue-100313.rs:18:5
33
|
44
LL | x.set_false();
5-
| ^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^ evaluation of `_` failed inside this call
66
|
77
note: inside `T::<&true>::set_false`
88
--> $DIR/issue-100313.rs:11:13

‎tests/ui/const-generics/min_const_generics/invalid-patterns.32bit.stderr

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: using uninitialized data, but this operation requires initialized
22
--> $DIR/invalid-patterns.rs:40:32
33
|
44
LL | get_flag::<false, { unsafe { char_raw.character } }>();
5-
| ^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^^^^^^ evaluation of `main::{constant#7}` failed here
66

77
error[E0080]: constructing invalid value: encountered 0x42, but expected a boolean
88
--> $DIR/invalid-patterns.rs:42:14
@@ -30,7 +30,7 @@ error[E0080]: using uninitialized data, but this operation requires initialized
3030
--> $DIR/invalid-patterns.rs:44:58
3131
|
3232
LL | get_flag::<{ unsafe { bool_raw.boolean } }, { unsafe { char_raw.character } }>();
33-
| ^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
33+
| ^^^^^^^^^^^^^^^^^^ evaluation of `main::{constant#11}` failed here
3434

3535
error[E0308]: mismatched types
3636
--> $DIR/invalid-patterns.rs:31:21

‎tests/ui/const-generics/min_const_generics/invalid-patterns.64bit.stderr

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: using uninitialized data, but this operation requires initialized
22
--> $DIR/invalid-patterns.rs:40:32
33
|
44
LL | get_flag::<false, { unsafe { char_raw.character } }>();
5-
| ^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^^^^^^ evaluation of `main::{constant#7}` failed here
66

77
error[E0080]: constructing invalid value: encountered 0x42, but expected a boolean
88
--> $DIR/invalid-patterns.rs:42:14
@@ -30,7 +30,7 @@ error[E0080]: using uninitialized data, but this operation requires initialized
3030
--> $DIR/invalid-patterns.rs:44:58
3131
|
3232
LL | get_flag::<{ unsafe { bool_raw.boolean } }, { unsafe { char_raw.character } }>();
33-
| ^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
33+
| ^^^^^^^^^^^^^^^^^^ evaluation of `main::{constant#11}` failed here
3434

3535
error[E0308]: mismatched types
3636
--> $DIR/invalid-patterns.rs:31:21

‎tests/ui/const-ptr/forbidden_slices.stderr

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -103,13 +103,13 @@ error[E0080]: evaluation panicked: assertion failed: 0 < pointee_size && pointee
103103
--> $DIR/forbidden_slices.rs:50:33
104104
|
105105
LL | pub static R1: &[()] = unsafe { from_ptr_range(ptr::null()..ptr::null()) }; // errors inside libcore
106-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of static initializer failed here
106+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `R1` failed here
107107

108108
error[E0080]: in-bounds pointer arithmetic failed: attempting to offset pointer by 8 bytes, but got ALLOC10 which is only 4 bytes from the end of the allocation
109109
--> $DIR/forbidden_slices.rs:54:25
110110
|
111111
LL | from_ptr_range(ptr..ptr.add(2)) // errors inside libcore
112-
| ^^^^^^^^^^ evaluation of static initializer failed here
112+
| ^^^^^^^^^^ evaluation of `R2` failed here
113113

114114
error[E0080]: constructing invalid value at .<deref>[0]: encountered uninitialized memory, but expected an integer
115115
--> $DIR/forbidden_slices.rs:57:1
@@ -161,19 +161,19 @@ error[E0080]: in-bounds pointer arithmetic failed: attempting to offset pointer
161161
--> $DIR/forbidden_slices.rs:79:25
162162
|
163163
LL | from_ptr_range(ptr..ptr.add(1))
164-
| ^^^^^^^^^^ evaluation of static initializer failed here
164+
| ^^^^^^^^^^ evaluation of `R8` failed here
165165

166166
error[E0080]: `ptr_offset_from_unsigned` called on two different pointers that are not both derived from the same allocation
167167
--> $DIR/forbidden_slices.rs:85:34
168168
|
169169
LL | pub static R9: &[u32] = unsafe { from_ptr_range(&D0..(&D0 as *const u32).add(1)) };
170-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of static initializer failed here
170+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `R9` failed here
171171

172172
error[E0080]: `ptr_offset_from_unsigned` called on two different pointers that are not both derived from the same allocation
173173
--> $DIR/forbidden_slices.rs:87:35
174174
|
175175
LL | pub static R10: &[u32] = unsafe { from_ptr_range(&D0..&D0) };
176-
| ^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of static initializer failed here
176+
| ^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `R10` failed here
177177

178178
error: aborting due to 18 previous errors
179179

‎tests/ui/const-ptr/out_of_bounds_read.stderr

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -2,19 +2,19 @@ error[E0080]: memory access failed: attempting to access 4 bytes, but got ALLOC0
22
--> $DIR/out_of_bounds_read.rs:8:33
33
|
44
LL | const _READ: u32 = unsafe { ptr::read(PAST_END_PTR) };
5-
| ^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::_READ` failed here
66

77
error[E0080]: memory access failed: attempting to access 4 bytes, but got ALLOC0+0x4 which is at or beyond the end of the allocation of size 4 bytes
88
--> $DIR/out_of_bounds_read.rs:10:39
99
|
1010
LL | const _CONST_READ: u32 = unsafe { PAST_END_PTR.read() };
11-
| ^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
11+
| ^^^^^^^^^^^^^^^^^^^ evaluation of `main::_CONST_READ` failed here
1212

1313
error[E0080]: memory access failed: attempting to access 4 bytes, but got ALLOC0+0x4 which is at or beyond the end of the allocation of size 4 bytes
1414
--> $DIR/out_of_bounds_read.rs:12:37
1515
|
1616
LL | const _MUT_READ: u32 = unsafe { (PAST_END_PTR as *mut u32).read() };
17-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
17+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::_MUT_READ` failed here
1818

1919
error: aborting due to 3 previous errors
2020

‎tests/ui/consts/assert-type-intrinsics.stderr

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -2,19 +2,19 @@ error[E0080]: evaluation panicked: aborted execution: attempted to instantiate u
22
--> $DIR/assert-type-intrinsics.rs:11:9
33
|
44
LL | MaybeUninit::<!>::uninit().assume_init();
5-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::_BAD1` failed here
66

77
error[E0080]: evaluation panicked: aborted execution: attempted to leave type `&i32` uninitialized, which is invalid
88
--> $DIR/assert-type-intrinsics.rs:15:9
99
|
1010
LL | intrinsics::assert_mem_uninitialized_valid::<&'static i32>();
11-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
11+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::_BAD2` failed here
1212

1313
error[E0080]: evaluation panicked: aborted execution: attempted to zero-initialize type `&i32`, which is invalid
1414
--> $DIR/assert-type-intrinsics.rs:19:9
1515
|
1616
LL | intrinsics::assert_zero_valid::<&'static i32>();
17-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
17+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::_BAD3` failed here
1818

1919
error: aborting due to 3 previous errors
2020

‎tests/ui/consts/const-array-oob.stderr

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2,13 +2,13 @@ error[E0080]: index out of bounds: the length is 3 but the index is 4
22
--> $DIR/const-array-oob.rs:5:19
33
|
44
LL | const BLUB: [u32; FOO[4]] = [5, 6];
5-
| ^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^ evaluation of `BLUB::{constant#0}` failed here
66

77
error[E0080]: index out of bounds: the length is 3 but the index is 5
88
--> $DIR/const-array-oob.rs:2:20
99
|
1010
LL | const BAR: usize = FOO[5];
11-
| ^^^^^^ evaluation of constant value failed here
11+
| ^^^^^^ evaluation of `BAR` failed here
1212

1313
error: aborting due to 2 previous errors
1414

‎tests/ui/consts/const-assert-unchecked-ub.stderr

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@ error[E0080]: `assume` called with `false`
22
--> $DIR/const-assert-unchecked-ub.rs:3:5
33
|
44
LL | std::hint::assert_unchecked(n < 32);
5-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `_` failed here
66

77
error: aborting due to 1 previous error
88

‎tests/ui/consts/const-compare-bytes-ub.stderr

Lines changed: 8 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -2,49 +2,49 @@ error[E0080]: memory access failed: attempting to access 1 byte, but got null po
22
--> $DIR/const-compare-bytes-ub.rs:9:9
33
|
44
LL | compare_bytes(0 as *const u8, 2 as *const u8, 1)
5-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
5+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::LHS_NULL` failed here
66

77
error[E0080]: memory access failed: attempting to access 1 byte, but got 0x1[noalloc] which is a dangling pointer (it has no provenance)
88
--> $DIR/const-compare-bytes-ub.rs:13:9
99
|
1010
LL | compare_bytes(1 as *const u8, 0 as *const u8, 1)
11-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
11+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::RHS_NULL` failed here
1212

1313
error[E0080]: memory access failed: attempting to access 1 byte, but got 0x1[noalloc] which is a dangling pointer (it has no provenance)
1414
--> $DIR/const-compare-bytes-ub.rs:17:9
1515
|
1616
LL | compare_bytes(1 as *const u8, 2 as *const u8, 1)
17-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
17+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::DANGLING_PTR_NON_ZERO_LENGTH` failed here
1818

1919
error[E0080]: memory access failed: attempting to access 4 bytes, but got ALLOC0 which is only 3 bytes from the end of the allocation
2020
--> $DIR/const-compare-bytes-ub.rs:21:9
2121
|
2222
LL | compare_bytes([1, 2, 3].as_ptr(), [1, 2, 3, 4].as_ptr(), 4)
23-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
23+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::LHS_OUT_OF_BOUNDS` failed here
2424

2525
error[E0080]: memory access failed: attempting to access 4 bytes, but got ALLOC1 which is only 3 bytes from the end of the allocation
2626
--> $DIR/const-compare-bytes-ub.rs:25:9
2727
|
2828
LL | compare_bytes([1, 2, 3, 4].as_ptr(), [1, 2, 3].as_ptr(), 4)
29-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
29+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::RHS_OUT_OF_BOUNDS` failed here
3030

3131
error[E0080]: reading memory at ALLOC2[0x0..0x1], but memory is uninitialized at [0x0..0x1], and this operation requires initialized memory
3232
--> $DIR/const-compare-bytes-ub.rs:29:9
3333
|
3434
LL | compare_bytes(MaybeUninit::uninit().as_ptr(), [1].as_ptr(), 1)
35-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
35+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::LHS_UNINIT` failed here
3636

3737
error[E0080]: reading memory at ALLOC3[0x0..0x1], but memory is uninitialized at [0x0..0x1], and this operation requires initialized memory
3838
--> $DIR/const-compare-bytes-ub.rs:33:9
3939
|
4040
LL | compare_bytes([1].as_ptr(), MaybeUninit::uninit().as_ptr(), 1)
41-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
41+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::RHS_UNINIT` failed here
4242

4343
error[E0080]: unable to turn pointer into integer
4444
--> $DIR/const-compare-bytes-ub.rs:37:9
4545
|
4646
LL | compare_bytes([&1].as_ptr().cast(), [&2].as_ptr().cast(), std::mem::size_of::<usize>())
47-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of constant value failed here
47+
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `main::WITH_PROVENANCE` failed here
4848
|
4949
= help: this code performed an operation that depends on the underlying bytes representing a pointer
5050
= help: the absolute address of a pointer is not known at compile-time, so such operations are not supported

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