[clang] a6f9077 - [clang] Check for nullptr when instantiating late attrs

[Adam Czachorowski via cfe-commits]

Author: Adam Czachorowski
Date: 2021-01-19T13:43:15+01:00
New Revision: a6f9077b16da90204b296acd4f840769e83460ac

URL: https://github.com/llvm/llvm-project/commit/a6f9077b16da90204b296acd4f840769e83460ac
DIFF: https://github.com/llvm/llvm-project/commit/a6f9077b16da90204b296acd4f840769e83460ac.diff

LOG: [clang] Check for nullptr when instantiating late attrs

This was already done in SemaTemplateInstantiateDecl.cpp, but not in
SemaTemplateInstantiate.cpp.

Anecdotally I've seen some clangd crashes where coredumps point to this
being a problem, but I cannot reproduce this so far.

Differential Revision: https://reviews.llvm.org/D94933

Added: 
    

Modified: 
    clang/lib/Sema/SemaTemplateInstantiate.cpp

Removed: 
    


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diff  --git a/clang/lib/Sema/SemaTemplateInstantiate.cpp b/clang/lib/Sema/SemaTemplateInstantiate.cpp
index cb74f08830c8..7679063ead71 100644
--- a/clang/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiate.cpp
@@ -2796,7 +2796,8 @@ Sema::InstantiateClass(SourceLocation PointOfInstantiation,
 
     Attr *NewAttr =
       instantiateTemplateAttribute(I->TmplAttr, Context, *this, TemplateArgs);
-    I->NewDecl->addAttr(NewAttr);
+    if (NewAttr)
+      I->NewDecl->addAttr(NewAttr);
     LocalInstantiationScope::deleteScopes(I->Scope,
                                           Instantiator.getStartingScope());
   }