https://git.ruby-lang.org/ruby.git/commit/?id=b9e52db283

From b9e52db28398c5a792ae16730243af764c869bcd Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sat, 4 May 2019 22:00:22 +0900
Subject: Add a pathologic check


diff --git a/time.c b/time.c
index 2630f73..2086dcd 100644
--- a/time.c
+++ b/time.c
@@ -4627,6 +4627,9 @@ time_isdst(VALUE time) https://github.com/ruby/ruby/blob/trunk/time.c#L4627
 
     GetTimeval(time, tobj);
     MAKE_TM(time, tobj);
+    if (tobj->vtm.isdst == VTM_ISDST_INITVAL) {
+        rb_raise(rb_eRuntimeError, "isdst is not set yet");
+    }
     return tobj->vtm.isdst ? Qtrue : Qfalse;
 }
 
-- 
cgit v0.10.2


--
ML: ruby-changes@q...
Info: http://www.atdot.net/~ko1/quickml/