https://github.com/hahnjo created
https://github.com/llvm/llvm-project/pull/154158
This can be triggered with lazy template loading.
Draft because it would be nice to have a standalone test for this...
>From 05dce547dd35e40ddc7ff8f4d788be68d3ddc8a5 Mon Sep 17 00:00:00 2001
From: Jonas Hahnfeld <jonas.hahnf...@cern.ch>
Date: Mon, 18 Aug 2025 18:54:42 +0200
Subject: [PATCH] [Sema] Compare canonical conversion function
This can be triggered with lazy template loading.
---
clang/lib/Sema/SemaOverload.cpp | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/clang/lib/Sema/SemaOverload.cpp b/clang/lib/Sema/SemaOverload.cpp
index 7c4405b414c47..690125d880293 100644
--- a/clang/lib/Sema/SemaOverload.cpp
+++ b/clang/lib/Sema/SemaOverload.cpp
@@ -4404,14 +4404,19 @@ CompareImplicitConversionSequences(Sema &S,
SourceLocation Loc,
Result = CompareStandardConversionSequences(S, Loc,
ICS1.Standard, ICS2.Standard);
else if (ICS1.isUserDefined()) {
+ auto ConvFunc1 = ICS1.UserDefined.ConversionFunction;
+ if (ConvFunc1)
+ ConvFunc1 = ConvFunc1->getCanonicalDecl();
+ auto ConvFunc2 = ICS2.UserDefined.ConversionFunction;
+ if (ConvFunc2)
+ ConvFunc2 = ConvFunc2->getCanonicalDecl();
// User-defined conversion sequence U1 is a better conversion
// sequence than another user-defined conversion sequence U2 if
// they contain the same user-defined conversion function or
// constructor and if the second standard conversion sequence of
// U1 is better than the second standard conversion sequence of
// U2 (C++ 13.3.3.2p3).
- if (ICS1.UserDefined.ConversionFunction ==
- ICS2.UserDefined.ConversionFunction)
+ if (ConvFunc1 == ConvFunc2)
Result = CompareStandardConversionSequences(S, Loc,
ICS1.UserDefined.After,
ICS2.UserDefined.After);
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