* proc.c (rb_block_arity): should not call GetProcPtr() for symbols.

  [ruby-core:72205] [Bug #11830]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53170 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 4 deletions

diff --git a/proc.c b/proc.c
index a43c798a84..b8b2145c41 100644
--- a/proc.c
+++ b/proc.c
@@ -956,10 +956,15 @@ rb_block_arity(void)
     min = rb_block_min_max_arity(block, &max);
     proc_value = block->proc;
     if (proc_value) {
-	rb_proc_t *proc;
-	GetProcPtr(proc_value, proc);
-	if (proc)
-	    return (proc->is_lambda ? min == max : max != UNLIMITED_ARGUMENTS) ? min : -min-1;
+	if (SYMBOL_P(proc_value)) {
+	    return -1;
+	}
+	else {
+	    rb_proc_t *proc;
+	    GetProcPtr(proc_value, proc);
+	    if (proc)
+		return (proc->is_lambda ? min == max : max != UNLIMITED_ARGUMENTS) ? min : -min-1;
+	}
     }
     return max != UNLIMITED_ARGUMENTS ? min : -min-1;
 }