move_ref_pattern: don't ICE on unreachable 2xby-move conflicts

This commit is contained in:
Mazdak Farrokhzad 2020-02-02 16:07:51 +01:00
parent 0253f868ca
commit 8d4973f587
2 changed files with 15 additions and 3 deletions

View File

@ -648,9 +648,6 @@ fn check_borrow_conflicts_in_at_patterns(cx: &MatchVisitor<'_, '_>, pat: &Pat<'_
let mut conflicts_ref = Vec::new();
sub.each_binding(|_, hir_id, span, _| {
match tables.extract_binding_mode(sess, hir_id, span) {
Some(ty::BindByValue(_)) if is_binding_by_move(cx, hir_id, span) => {
sess.delay_span_bug(span, "by-move in subpat unchecked by borrowck");
}
Some(ty::BindByValue(_)) | None => {}
Some(ty::BindByReference(_)) => conflicts_ref.push(span),
}

View File

@ -0,0 +1,15 @@
// When conflicts between by-move bindings in `by_move_1 @ has_by_move` patterns
// happen and that code is unreachable according to borrowck, we accept this code.
// In particular, we want to ensure here that an ICE does not happen, which it did originally.
// check-pass
#![feature(move_ref_pattern)]
#![feature(bindings_after_at)]
fn main() {
return;
struct S;
let a @ (b, c) = (S, S);
}