r272318 - Fix a crash in the AST dumper.

[Richard Trieu via cfe-commits]

Author: rtrieu
Date: Thu Jun  9 17:03:04 2016
New Revision: 272318

URL: http://llvm.org/viewvc/llvm-project?rev=272318&view=rev
Log:
Fix a crash in the AST dumper.

Boxed expressions in a template context may have a null method decl.  If so,
don't try to access the selector.

Modified:
    cfe/trunk/lib/AST/ASTDumper.cpp
    cfe/trunk/test/Misc/ast-dump-decl.mm

Modified: cfe/trunk/lib/AST/ASTDumper.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ASTDumper.cpp?rev=272318&r1=272317&r2=272318&view=diff
==============================================================================
--- cfe/trunk/lib/AST/ASTDumper.cpp (original)
+++ cfe/trunk/lib/AST/ASTDumper.cpp Thu Jun  9 17:03:04 2016
@@ -2177,8 +2177,10 @@ void ASTDumper::VisitObjCMessageExpr(con
 
 void ASTDumper::VisitObjCBoxedExpr(const ObjCBoxedExpr *Node) {
   VisitExpr(Node);
-  OS << " selector=";
-  Node->getBoxingMethod()->getSelector().print(OS);
+  if (auto *BoxingMethod = Node->getBoxingMethod()) {
+    OS << " selector=";
+    BoxingMethod->getSelector().print(OS);
+  }
 }
 
 void ASTDumper::VisitObjCAtCatchStmt(const ObjCAtCatchStmt *Node) {

Modified: cfe/trunk/test/Misc/ast-dump-decl.mm
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Misc/ast-dump-decl.mm?rev=272318&r1=272317&r2=272318&view=diff
==============================================================================
--- cfe/trunk/test/Misc/ast-dump-decl.mm (original)
+++ cfe/trunk/test/Misc/ast-dump-decl.mm Thu Jun  9 17:03:04 2016
@@ -21,3 +21,13 @@
 // CHECK-NEXT:     CXXConstructExpr
 // CHECK-NEXT:   ObjCIvarDecl{{.*}} X
 // CHECK-NEXT:   ObjCMethodDecl{{.*}} foo
+
+// @() boxing expressions.
+template <typename T>
+struct BoxingTest {
+  static id box(T value) {
+    return @(value);
+  }
+};
+
+// CHECK: ObjCBoxedExpr{{.*}} '<dependent type>'{{$}}