proc.c: fix infinite loop

* proc.c (rb_proc_get_iseq): proc made from symbol does not have
  iseq.  fix infinite loop.  [ruby-core:72381] [Bug #11845]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53206 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 3 deletions

diff --git a/proc.c b/proc.c
index 615a6e9d5a..b8c40a1d84 100644
--- a/proc.c
+++ b/proc.c
@@ -975,7 +975,6 @@ rb_proc_get_iseq(VALUE self, int *is_proc)
     const rb_proc_t *proc;
     const rb_iseq_t *iseq;
 
-  again:
     GetProcPtr(self, proc);
     iseq = proc->block.iseq;
     if (is_proc) *is_proc = !proc->is_lambda;
@@ -990,8 +989,7 @@ rb_proc_get_iseq(VALUE self, int *is_proc)
 	return iseq;
     }
     else if (SYMBOL_P(iseq)) {
-	self = rb_sym_to_proc((VALUE)iseq);
-	goto again;
+	return NULL;
     }
     else {
 	return rb_iseq_check(iseq);