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Internal compiler error casting to trait type twice #3689

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ben0x539 opened this issue Oct 7, 2012 · 3 comments
Closed

Internal compiler error casting to trait type twice #3689

ben0x539 opened this issue Oct 7, 2012 · 3 comments
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A-trait-system Area: Trait system I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️
Milestone
0.7

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@ben0x539
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ben0x539 commented Oct 7, 2012

I accidentally had something like stdout() as io::Writer and got an ICE, but it also happens with trivial traits/trait impls like this:

trait Foo {}
impl (): Foo {}

fn main() {
    let _a = () as Foo as Foo;
}

rustc just errors out with an unexpected failure, and says

rust: task failed at 'get_vtable: expected a static origin', /home/ben/code/repos/rust/src/rustc/middle/trans/meth.rs:507
@jbclements
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Looks like I just ran into this too...

@catamorphism
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Bumping to 0.7

@ben0x539
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Can't reproduce this anymore. Maybe it went away when sigils started being required for object-boxing?

bors pushed a commit to rust-lang-ci/rust that referenced this issue May 15, 2021
@la10736 @topecongiro
rust-lang#3665: Implemented (rust-lang#3689)
76e2ba2
xFrednet pushed a commit to xFrednet/rust that referenced this issue May 21, 2022
@sunfishcode
Fix cast_lossless to avoid warning on usize to f64 conversion.
6ff77b9 
Previously, the `cast_lossless` lint would issue a warning on code that
converted a `usize` value to `f64`, on 32-bit targets.

`usize` to `f64` is a lossless cast on 32-bit targets, however there is
no corresponding `f64::from` that takes a `usize`, so `cast_lossless`'s
suggested replacement does not compile.

This PR disables the lint in the case of casting from `usize` or `isize`.

Fixes rust-lang#3689.

changelog: [`cast_lossless`] no longer gives wrong suggestion on usize->f64
xFrednet pushed a commit to xFrednet/rust that referenced this issue May 21, 2022
@bors
Auto merge of rust-lang#8778 - sunfishcode:main, r=giraffate
5dad517 
Fix `cast_lossless` to avoid warning on `usize` to `f64` conversion.

Previously, the `cast_lossless` lint would issue a warning on code that
converted a `usize` value to `f64`, on 32-bit targets.

`usize` to `f64` is a lossless cast on 32-bit targets, however there is
no corresponding `f64::from` that takes a `usize`, so `cast_lossless`'s
suggested replacement does not compile.

This PR disables the lint in the case of casting from `usize` or `isize`.

Fixes rust-lang#3689.

changelog: [`cast_lossless`] no longer gives wrong suggestion on usize,isize->f64
RalfJung pushed a commit to RalfJung/rust that referenced this issue Jun 29, 2024
@bors
Auto merge of rust-lang#3689 - adwinwhite:lseek64, r=RalfJung
4be2c66 
Fix ICE caused by seeking past `i64::MAX`

Make Miri behave the same as standard library on file seeking offset.

Fixes rust-lang#3680.
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A-trait-system Area: Trait system I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️
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@ben0x539 @jbclements @catamorphism