* error.c (exc_equal): clear rb_thread_t::errinfo when ignore

  an exception under rb_protect(). [ruby-core:41979] [Bug #5865]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34301 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/error.c b/error.c
index 3b80a24bdd..03e22bfa3a 100644
--- a/error.c
+++ b/error.c
@@ -746,7 +746,10 @@ exc_equal(VALUE exc, VALUE obj)
 	CONST_ID(id_backtrace, "backtrace");
 
 	obj = rb_protect(try_convert_to_exception, obj, &status);
-	if (status || obj == Qundef) return Qfalse;
+	if (status || obj == Qundef) {
+	    rb_set_errinfo(Qnil);
+	    return Qfalse;
+	}
 	if (rb_obj_class(exc) != rb_obj_class(obj)) return Qfalse;
 	mesg = rb_check_funcall(obj, id_message, 0, 0);
 	if (mesg == Qundef) return Qfalse;