fix rdar://6611778, a redefinition of an interface was causing an

assertion when the ivars and method list was reset into the existing
interface.  To fix this, mark decls as invalid when they are redefined,
and don't insert ivars/methods into invalid decls.

llvm-svn: 65340

1 files changed, 3 insertions, 2 deletions

diff --git a/clang/lib/Sema/SemaDeclObjC.cpp b/clang/lib/Sema/SemaDeclObjC.cpp
index 660f745228b..b3644a5ab9c 100644
--- a/clang/lib/Sema/SemaDeclObjC.cpp
+++ b/clang/lib/Sema/SemaDeclObjC.cpp
@@ -78,6 +78,7 @@ ActOnStartClassInterface(SourceLocation AtInterfaceLoc,
   if (IDecl) {
     // Class already seen. Is it a forward declaration?
     if (!IDecl->isForwardDecl()) {
+      IDecl->setInvalidDecl();
       Diag(AtInterfaceLoc, diag::err_duplicate_class_def)<<IDecl->getDeclName();
       Diag(IDecl->getLocation(), diag::note_previous_definition);
 
@@ -225,6 +226,7 @@ Sema::ActOnStartProtocolInterface(SourceLocation AtProtoInterfaceLoc,
   if (PDecl) {
     // Protocol already seen. Better be a forward protocol declaration
     if (!PDecl->isForwardDecl()) {
+      PDecl->setInvalidDecl();
       Diag(ProtocolLoc, diag::err_duplicate_protocol_def) << ProtocolName;
       Diag(PDecl->getLocation(), diag::note_previous_definition);
       // Just return the protocol we already had.
@@ -555,8 +557,7 @@ Sema::DeclTy *Sema::ActOnStartClassImplementation(
   if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {
     Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName;
     Diag(PrevDecl->getLocation(), diag::note_previous_definition);
-  }
-  else {
+  }  else {
     // Is there an interface declaration of this class; if not, warn!
     IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); 
     if (!IDecl)