# HG changeset patch
# User kvn
# Date 1252454191 25200
# Node ID 26fbe81d30cf9a234fadf159c9a2c0d176efd743
# Parent  0f1c19b7a52de1837c59aa8105458a4cb8f1dcd6
6880052: SIGSEGV in GraphKit::null_check_common()
Summary: Check that a klass is not NULL before the is_loaded() call.
Reviewed-by: never

diff -r 0f1c19b7a52d -r 26fbe81d30cf src/share/vm/opto/graphKit.cpp
--- a/src/share/vm/opto/graphKit.cpp	Tue Sep 08 10:42:50 2009 -0700
+++ b/src/share/vm/opto/graphKit.cpp	Tue Sep 08 16:56:31 2009 -0700
@@ -1126,7 +1126,7 @@
       const Type *t = _gvn.type( value );
 
       const TypeOopPtr* tp = t->isa_oopptr();
-      if (tp != NULL && !tp->klass()->is_loaded()
+      if (tp != NULL && tp->klass() != NULL && !tp->klass()->is_loaded()
           // Only for do_null_check, not any of its siblings:
           && !assert_null && null_control == NULL) {
         // Usually, any field access or invocation on an unloaded oop type