ICE: translating unsupported cast #24100
Labels
I-ICE
Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️
Comments
jdm
added
the
I-ICE
|
Me too: Crate: https://github.com/goertzenator/liblrust Output: https://gist.github.com/goertzenator/912f010da6f2ae243336 Rust: OS: |
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Me three, with this trivial program: #[derive(Debug)]
struct S {
v: String,
}
fn main() {
let x = S { v: "hello".to_string() };
println!("{:?}", x as S);
}Self-built rustc from the 1.0.0-beta commit: |
|
Adding another report, with a similar setup. Encountered this in my code, boiled it down to this test...looks very similar to @robn's ICE, since it is trying to cast "same" -> "same". Seems to only happen when trying to cast a struct to itself with pub struct Consumer<T> {
vec: Vec<T>
}
impl<T> Consumer<T> {
pub fn pop(&mut self) -> T {
self.vec.pop().unwrap() as T // <--- Removing "as T" fixes the ICE
}
}
// #[derive(Copy, Clone)] // <-- tried to add Copy/Clone, does not fix ICE
struct TestStruct {
a: u32
}
impl TestStruct {
pub fn new() -> TestStruct {
TestStruct { a: 19 }
}
}
#[test]
fn test_struct() {
let mut c = Consumer {
vec: vec![TestStruct::new(), TestStruct::new()]
//vec: vec![0,1,2,3] // <-- works fine
};
let t: TestStruct = c.pop();
} |
bluss
pushed a commit
to bluss/rust
that referenced
this issue
May 1, 2015
Fixes ICEs where non-fat pointers and scalars are cast to fat pointers, Fixes rust-lang#21397 Fixes rust-lang#22955 Fixes rust-lang#23237 Fixes rust-lang#24100
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Example code:
Error message:
Rust:
OS:
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