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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
| commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
| tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /compiler/rustc_infer/src/infer/lub.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 'compiler/rustc_infer/src/infer/lub.rs')
| -rw-r--r-- | compiler/rustc_infer/src/infer/lub.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/compiler/rustc_infer/src/infer/lub.rs b/compiler/rustc_infer/src/infer/lub.rs index 97ed4729b..c07ac1d3a 100644 --- a/compiler/rustc_infer/src/infer/lub.rs +++ b/compiler/rustc_infer/src/infer/lub.rs @@ -103,6 +103,11 @@ impl<'tcx> TypeRelation<'tcx> for Lub<'_, '_, 'tcx> { where T: Relate<'tcx>, { + // LUB of a binder and itself is just itself + if a == b { + return Ok(a); + } + debug!("binders(a={:?}, b={:?})", a, b); if a.skip_binder().has_escaping_bound_vars() || b.skip_binder().has_escaping_bound_vars() { // When higher-ranked types are involved, computing the LUB is |