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Compiler panics in ambiguous arrayvec type situation #65611
Description
The compiler correctly errors about the ambiguous types, but also panics on this code:
use arrayvec::ArrayVec;
fn main() {
let mut buffer = ArrayVec::new();
let x = buffer.last().unwrap().0.clone();
buffer.reverse();
}
error[E0282]: type annotations needed
--> src/main.rs:5:13
|
5 | let x = buffer.last().unwrap().0.clone();
| ^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for `T`
|
= note: type must be known at this point
error[E0609]: no field `0` on type `&_`
--> src/main.rs:5:36
|
5 | let x = buffer.last().unwrap().0.clone();
| ^
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', src/libcore/option.rs:378:21
Activity
jonas-schievink commentedon Oct 19, 2019
Also reproduces on nightly. Panic happens here:
pnkfelix commentedon Oct 24, 2019
triage: P-medium. removing nomination label.
reasoning: has a PR. tagging as P-medium (since it does produce useful error message before ICE'ing), and removing nomination label.
Rollup merge of rust-lang#65755 - estebank:icicle, r=davidtwco
Rollup merge of rust-lang#65755 - estebank:icicle, r=davidtwco
Rollup merge of rust-lang#83289 - c410-f3r:tests-tests-tests, r=petro…