Trying to concatenate strings with operator += results in an Internal Compiler Error #11344
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Jan 10, 2014
…ichton
So far the following code
```
struct Foo;
fn main() {
let mut t = Foo;
let ref b = Foo;
a += *b;
}
```
errors with
```
test.rs:15:3: 13:11 error: binary operation + cannot be applied to type `Foo`
test.rs:15 *a += *b;
```
Since assignment-operators are no longer expanded to ```left = left OP right``` but are independents operators it should be
```
test.rs:15:3: 13:11 error: binary operation += cannot be applied to type `Foo`
test.rs:15 *a += *b;
```
to make it clear that implementing Add for Foo is not gonna work. (cf issues #11143, #11344)
Besides that, we also need to typecheck the rhs expression even if the operator has no implementation, or we end up with unknown types for the nodes of the rhs and an ICE later on while resolving types. (once again cf #11143 and #11344).
This probably would get fixed with #5992, but in the meantime it's a confusing error to stumble upon.
@pcwalton, you wrote the original code, what do you think?
(closes #11143 and #11344)
|
Is There anyway around this? |
|
Closed by #11449 (wasn't listed properly in the commit message). |
|
@RichardlL: This bug isn't present anymore. It's correctly reporting that |
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The following code produces an internal compiler error:
Compiler output:
The text was updated successfully, but these errors were encountered: