7d4d09eeeb
Previously, we included a redundant prefix on the panic message and a postfix of the location of the panic. The prefix didn't carry any additional information beyond "something failed", and the location of the panic is redundant with the diagnostic's span, which gets printed out even if its code is not shown.
```
error[E0080]: evaluation of constant value failed
--> $DIR/assert-type-intrinsics.rs:11:9
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LL | MaybeUninit::<!>::uninit().assume_init();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation panicked: aborted execution: attempted to instantiate uninhabited type `!`
```
```
error[E0080]: evaluation of `Fail::<i32>::C` failed
--> $DIR/collect-in-dead-closure.rs:9:19
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LL | const C: () = panic!();
| ^^^^^^^^ evaluation panicked: explicit panic
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= note: this error originates in the macro
`$crate::panic::panic_2015` which comes from the expansion of the macro
`panic` (in Nightly builds, run with -Z macro-backtrace for more info)
```
```
error[E0080]: evaluation of constant value failed
--> $DIR/uninhabited.rs:41:9
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LL | assert!(false);
| ^^^^^^^^^^^^^^ evaluation panicked: assertion failed: false
|
= note: this error originates in the macro `assert` (in Nightly builds, run with -Z macro-backtrace for more info)
```
---
When the primary span for a const error is the same as the first frame in the const error report, skip it.
```
error[E0080]: evaluation of constant value failed
--> $DIR/issue-88434-removal-index-should-be-less.rs:3:24
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LL | const _CONST: &[u8] = &f(&[], |_| {});
| ^^^^^^^^^^^^^^ evaluation panicked: explicit panic
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note: inside `f::<{closure@$DIR/issue-88434-removal-index-should-be-less.rs:3:31: 3:34}>`
--> $DIR/issue-88434-removal-index-should-be-less.rs:10:5
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LL | panic!()
| ^^^^^^^^ the failure occurred here
= note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
```
instead of
```
error[E0080]: evaluation of constant value failed
--> $DIR/issue-88434-removal-index-should-be-less.rs:10:5
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LL | panic!()
| ^^^^^^^^ explicit panic
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note: inside `f::<{closure@$DIR/issue-88434-removal-index-should-be-less.rs:3:31: 3:34}>`
--> $DIR/issue-88434-removal-index-should-be-less.rs:10:5
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LL | panic!()
| ^^^^^^^^
note: inside `_CONST`
--> $DIR/issue-88434-removal-index-should-be-less.rs:3:24
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LL | const _CONST: &[u8] = &f(&[], |_| {});
| ^^^^^^^^^^^^^^
= note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
```
---
Revert order of constant evaluation errors
Point at the code the user wrote first and std functions last.
```
error[E0080]: evaluation of constant value failed
--> $DIR/const-errs-dont-conflict-103369.rs:5:25
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LL | impl ConstGenericTrait<{my_fn(1)}> for () {}
| ^^^^^^^^ evaluation panicked: Some error occurred
|
note: called from `my_fn`
--> $DIR/const-errs-dont-conflict-103369.rs:10:5
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LL | panic!("Some error occurred");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
```
instead of
```
error[E0080]: evaluation of constant value failed
--> $DIR/const-errs-dont-conflict-103369.rs:10:5
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LL | panic!("Some error occurred");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Some error occurred
|
note: called from `<() as ConstGenericTrait<{my_fn(1)}>>::{constant#0}`
--> $DIR/const-errs-dont-conflict-103369.rs:5:25
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LL | impl ConstGenericTrait<{my_fn(1)}> for () {}
| ^^^^^^^^
= note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
```
103 lines
5.7 KiB
Plaintext
103 lines
5.7 KiB
Plaintext
error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:8:46
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LL | pub const BEFORE_START: *const u8 = unsafe { (&0u8 as *const u8).offset(-1) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer arithmetic: expected a pointer to the end of 1 byte of memory, but got ALLOC0 which is at the beginning of the allocation
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note: inside `std::ptr::const_ptr::<impl *const u8>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:9:43
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LL | pub const AFTER_END: *const u8 = unsafe { (&0u8 as *const u8).offset(2) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer arithmetic: expected a pointer to $BYTES bytes of memory, but got ALLOC1 which is only 1 byte from the end of the allocation
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note: inside `std::ptr::const_ptr::<impl *const u8>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:10:45
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LL | pub const AFTER_ARRAY: *const u8 = unsafe { [0u8; 100].as_ptr().offset(101) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer arithmetic: expected a pointer to $BYTES bytes of memory, but got ALLOC2 which is only $BYTES bytes from the end of the allocation
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note: inside `std::ptr::const_ptr::<impl *const u8>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:12:43
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LL | pub const OVERFLOW: *const u16 = unsafe { [0u16; 1].as_ptr().offset(isize::MAX) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ overflowing pointer arithmetic: the total offset in bytes does not fit in an `isize`
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note: inside `std::ptr::const_ptr::<impl *const u16>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:13:44
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LL | pub const UNDERFLOW: *const u16 = unsafe { [0u16; 1].as_ptr().offset(isize::MIN) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ overflowing pointer arithmetic: the total offset in bytes does not fit in an `isize`
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note: inside `std::ptr::const_ptr::<impl *const u16>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:14:56
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LL | pub const OVERFLOW_ADDRESS_SPACE: *const u8 = unsafe { (usize::MAX as *const u8).offset(2) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer arithmetic: expected a pointer to $BYTES bytes of memory, but got 0xf..f[noalloc] which is a dangling pointer (it has no provenance)
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note: inside `std::ptr::const_ptr::<impl *const u8>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:15:57
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LL | pub const UNDERFLOW_ADDRESS_SPACE: *const u8 = unsafe { (1 as *const u8).offset(-2) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer arithmetic: expected a pointer to the end of $BYTES bytes of memory, but got 0x1[noalloc] which is a dangling pointer (it has no provenance)
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note: inside `std::ptr::const_ptr::<impl *const u8>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:16:49
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LL | pub const NEGATIVE_OFFSET: *const u8 = unsafe { [0u8; 1].as_ptr().wrapping_offset(-2).offset(-2) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer arithmetic: expected a pointer to the end of $BYTES bytes of memory, but got ALLOC3-0x2 which points to before the beginning of the allocation
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note: inside `std::ptr::const_ptr::<impl *const u8>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:18:50
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LL | pub const ZERO_SIZED_ALLOC: *const u8 = unsafe { [0u8; 0].as_ptr().offset(1) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer arithmetic: expected a pointer to 1 byte of memory, but got ALLOC4 which is at or beyond the end of the allocation of size $BYTES bytes
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note: inside `std::ptr::const_ptr::<impl *const u8>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:19:42
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LL | pub const DANGLING: *const u8 = unsafe { ptr::NonNull::<u8>::dangling().as_ptr().offset(4) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer arithmetic: expected a pointer to $BYTES bytes of memory, but got 0x1[noalloc] which is a dangling pointer (it has no provenance)
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note: inside `std::ptr::mut_ptr::<impl *mut u8>::offset`
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--> $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
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error[E0080]: evaluation of constant value failed
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--> $DIR/offset_ub.rs:22:47
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LL | pub const UNDERFLOW_ABS: *const u8 = unsafe { (usize::MAX as *const u8).offset(isize::MIN) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer arithmetic: expected a pointer to the end of $BYTES bytes of memory, but got 0xf..f[noalloc] which is a dangling pointer (it has no provenance)
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note: inside `std::ptr::const_ptr::<impl *const u8>::offset`
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--> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
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error: aborting due to 11 previous errors
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For more information about this error, try `rustc --explain E0080`.
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