gistfile1.txt

diff --git a/ext/perftools.c b/ext/perftools.c
index e6f97f1..ace2e01 100644
--- a/ext/perftools.c
+++ b/ext/perftools.c
@@ -159,6 +159,8 @@ static VALUE Isend;
         case VM_FRAME_MAGIC_CFUNC:
           self = cfp->self;
 #ifdef HAVE_METHOD_H
+          if (! cfp->me) break;
+                               
           klass = cfp->me->klass;
           method = cfp->me->called_id;
 #else