Fix unintended fall-through.

zygoloid · zygoloid · commit 64e9044ea43d · 2021-10-08T14:25:17.000-07:00
Unfortunately I've not found a way to exercise this code that doesn't
crash elsewhere yet, due to unrelated bugs in how Sema incorrectly
instantiates lambdas in function template signatures.
diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
@@ -4972,6 +4972,7 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,
     Out << "L";
     mangleType(Context.getASTContext().getRecordType(cast<LambdaExpr>(E)->getLambdaClass()));
     Out << "E";
+    break;
   }
 
   case Expr::PackExpansionExprClass:

Original file line number	Diff line number	Diff line change
`@@ -4972,6 +4972,7 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,`
`4972`	`4972`	`Out << "L";`
`4973`	`4973`	`mangleType(Context.getASTContext().getRecordType(cast<LambdaExpr>(E)->getLambdaClass()));`
`4974`	`4974`	`Out << "E";`
	`4975`	`+ break;`
`4975`	`4976`	`}`
`4976`	`4977`
`4977`	`4978`	`case Expr::PackExpansionExprClass:`