[modules] Skip trailing attributes when skipping a class definition during parse-merging.

llvm-svn: 241180

clang/lib/Parse/ParseDeclCXX.cpp

@@ -2769,6 +2769,11 @@ void Parser::SkipCXXMemberSpecification(SourceLocation RecordLoc,
   BalancedDelimiterTracker T(*this, tok::l_brace);
   T.consumeOpen();
   T.skipToEnd();
+
+  // Parse and discard any trailing attributes.
+  ParsedAttributes Attrs(AttrFactory);
+  if (Tok.is(tok::kw___attribute))
+    MaybeParseGNUAttributes(Attrs);
 }
 
 /// ParseCXXMemberSpecification - Parse the class definition.

clang/test/Modules/Inputs/submodules-merge-defs/defs.h

@@ -80,3 +80,7 @@ namespace SeparateInline {
   void f() {}
   constexpr int g() { return 0; }
 }
+
+namespace TrailingAttributes {
+  template<typename T> struct X {} __attribute__((aligned(8)));
+}