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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/coherence/coherence-fn-implied-bounds.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/coherence/coherence-fn-implied-bounds.rs')
-rw-r--r-- | tests/ui/coherence/coherence-fn-implied-bounds.rs | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/coherence/coherence-fn-implied-bounds.rs b/tests/ui/coherence/coherence-fn-implied-bounds.rs new file mode 100644 index 000000000..4539af9a3 --- /dev/null +++ b/tests/ui/coherence/coherence-fn-implied-bounds.rs @@ -0,0 +1,26 @@ +// Test that our leak-check is not smart enough to take implied bounds +// into account (yet). Here we have two types that look like they +// should not be equivalent, but because of the rules on implied +// bounds we ought to know that, in fact, `'a = 'b` must always hold, +// and hence they are. +// +// Rustc can't figure this out and hence it accepts the impls but +// gives a future-compatibility warning (because we'd like to make +// this an error someday). +// +// Note that while we would like to make this a hard error, we also +// give the same warning for `coherence-wasm-bindgen.rs`, which ought +// to be accepted. + +#![deny(coherence_leak_check)] + +trait Trait {} + +impl Trait for for<'a, 'b> fn(&'a &'b u32, &'b &'a u32) -> &'b u32 {} + +impl Trait for for<'c> fn(&'c &'c u32, &'c &'c u32) -> &'c u32 { + //~^ ERROR conflicting implementations + //~| WARNING this was previously accepted by the compiler +} + +fn main() {} |