From e2195ee646f395f30f79a8124aa7d23eda0dc4f2 Mon Sep 17 00:00:00 2001 From: Erik Pilkington Date: Mon, 10 Sep 2018 21:54:04 +0000 Subject: [PATCH] [AST] Fix a crash on invalid. Problem was that we were appending to the source location info buffer in the copy assignment operator (instead of overwriting). rdar://42746401 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@341869 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/AST/NestedNameSpecifier.cpp | 1 + test/SemaCXX/rdar42746401.cpp | 7 +++++++ 2 files changed, 8 insertions(+) create mode 100644 test/SemaCXX/rdar42746401.cpp diff --git a/lib/AST/NestedNameSpecifier.cpp b/lib/AST/NestedNameSpecifier.cpp index a514d57b6b..df23972af2 100644 --- a/lib/AST/NestedNameSpecifier.cpp +++ b/lib/AST/NestedNameSpecifier.cpp @@ -547,6 +547,7 @@ operator=(const NestedNameSpecifierLocBuilder &Other) { } // Deep copy. + BufferSize = 0; Append(Other.Buffer, Other.Buffer + Other.BufferSize, Buffer, BufferSize, BufferCapacity); return *this; diff --git a/test/SemaCXX/rdar42746401.cpp b/test/SemaCXX/rdar42746401.cpp new file mode 100644 index 0000000000..ff9dff456c --- /dev/null +++ b/test/SemaCXX/rdar42746401.cpp @@ -0,0 +1,7 @@ +// RUN: %clang_cc1 -fsyntax-only -verify %s + +template +class b; +class c; // expected-note{{forward declaration}} + +::b<0> struct c::d // expected-error{{incomplete type}} expected-error{{cannot combine}} expected-error{{expected unqualified-id}} -- 2.50.1