* proc.c (rb_proc_call_with_block): prevent null reference.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@18271 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/proc.c b/proc.c
index 415ad1c20..59b3fd3ab 100644
--- a/proc.c
+++ b/proc.c
@@ -536,7 +536,7 @@ rb_proc_call_with_block(VALUE self, int argc, VALUE *argv, VALUE pass_procval)
     }
 
     return vm_invoke_proc(GET_THREAD(), proc, proc->block.self,
-			  argc, argv, &pass_proc->block);
+			  argc, argv, (pass_proc ? &pass_proc->block : 0));
 }
 
 /*