From 1aacef4f173fe9a60bf8867ddc300c77aa1123c6 Mon Sep 17 00:00:00 2001
From: Kent Ross <k@mad.cash>
Date: Mon, 13 Jul 2026 01:07:11 -0700
Subject: [PATCH] possible minimal fix for #146965, #146813, and #158756

---
 compiler/rustc_trait_selection/src/traits/select/mod.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs
index 440ed2b46320b..04ccd0d73e3d9 100644
--- a/compiler/rustc_trait_selection/src/traits/select/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs
@@ -1544,7 +1544,8 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
             //
             // FIXME(#132279): This is still incorrect as we treat opaque types
             // and default associated items differently between these two modes.
-            TypingMode::PostAnalysis | TypingMode::Codegen => true,
+            TypingMode::PostAnalysis => true,
+            TypingMode::Codegen => false,
         }
     }