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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 02:49:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 02:49:50 +0000 |
commit | 9835e2ae736235810b4ea1c162ca5e65c547e770 (patch) | |
tree | 3fcebf40ed70e581d776a8a4c65923e8ec20e026 /tests/ui/specialization/specialization-default-items-drop-coherence.rs | |
parent | Releasing progress-linux version 1.70.0+dfsg2-1~progress7.99u1. (diff) | |
download | rustc-9835e2ae736235810b4ea1c162ca5e65c547e770.tar.xz rustc-9835e2ae736235810b4ea1c162ca5e65c547e770.zip |
Merging upstream version 1.71.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/specialization/specialization-default-items-drop-coherence.rs')
-rw-r--r-- | tests/ui/specialization/specialization-default-items-drop-coherence.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tests/ui/specialization/specialization-default-items-drop-coherence.rs b/tests/ui/specialization/specialization-default-items-drop-coherence.rs new file mode 100644 index 000000000..16ad942d5 --- /dev/null +++ b/tests/ui/specialization/specialization-default-items-drop-coherence.rs @@ -0,0 +1,30 @@ +// check-pass +// known-bug: #105782 + +// Should fail. Default items completely drop candidates instead of ambiguity, +// which is unsound during coherence, since coherence requires completeness. + +#![feature(specialization)] +#![allow(incomplete_features)] + +trait Default { + type Id; +} + +impl<T> Default for T { + default type Id = T; +} + +trait Overlap { + type Assoc; +} + +impl Overlap for u32 { + type Assoc = usize; +} + +impl Overlap for <u32 as Default>::Id { + type Assoc = Box<usize>; +} + +fn main() {} |