* vm_eval.c (check_funcall): try respond_to? first if redefined.

  [Bug #5158]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32855 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 4 deletions

diff --git a/vm_eval.c b/vm_eval.c
index b4234e0f63..e7ff24f7d3 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -203,7 +203,7 @@ stack_check(void)
 }
 
 static inline rb_method_entry_t *rb_search_method_entry(VALUE recv, ID mid);
-static inline int rb_method_call_status(rb_thread_t *th, rb_method_entry_t *me, call_type scope, VALUE self);
+static inline int rb_method_call_status(rb_thread_t *th, const rb_method_entry_t *me, call_type scope, VALUE self);
 #define NOEX_OK NOEX_NOSUPER
 
 /*!
@@ -265,10 +265,19 @@ check_funcall_failed(struct rescue_funcall_args *args, VALUE e)
 static VALUE
 check_funcall(VALUE recv, ID mid, int argc, VALUE *argv)
 {
-    rb_method_entry_t *me = rb_search_method_entry(recv, mid);
+    const rb_method_entry_t *me = rb_method_entry(CLASS_OF(recv), idRespond_to);
     rb_thread_t *th = GET_THREAD();
-    int call_status = rb_method_call_status(th, me, CALL_FCALL, Qundef);
+    int call_status;
+
+    if (me && !(me->flag & NOEX_BASIC)) {
+	VALUE args[2] = {ID2SYM(mid), Qtrue};
+	if (!RTEST(vm_call0(th, recv, idRespond_to, 2, args, me))) {
+	    return Qundef;
+	}
+    }
 
+    me = rb_search_method_entry(recv, mid);
+    call_status = rb_method_call_status(th, me, CALL_FCALL, Qundef);
     if (call_status != NOEX_OK) {
 	if (rb_method_basic_definition_p(CLASS_OF(recv), idMethodMissing)) {
 	    return Qundef;
@@ -375,7 +384,7 @@ rb_search_method_entry(VALUE recv, ID mid)
 }
 
 static inline int
-rb_method_call_status(rb_thread_t *th, rb_method_entry_t *me, call_type scope, VALUE self)
+rb_method_call_status(rb_thread_t *th, const rb_method_entry_t *me, call_type scope, VALUE self)
 {
     VALUE klass;
     ID oid;