https://git.ruby-lang.org/ruby.git/commit/?id=c222f4d31f

From c222f4d31fc5f0566fa969d8fbb948f8841daf94 Mon Sep 17 00:00:00 2001
From: Kazuhiro NISHIYAMA <zn@m...>
Date: Tue, 30 Apr 2019 16:18:45 +0900
Subject: `from` is not nil but `""` on shallow clone [ci skip]


diff --git a/tool/vcs.rb b/tool/vcs.rb
index bd8e7e1..f4a10c8 100644
--- a/tool/vcs.rb
+++ b/tool/vcs.rb
@@ -490,7 +490,7 @@ class VCS https://github.com/ruby/ruby/blob/trunk/tool/vcs.rb#L490
         end
         rev unless rev.empty?
       end
-      unless (from ||= branch_beginning(url))
+      unless /./.match?(from ||= branch_beginning(url))
         raise "cannot find the beginning revision of the branch"
       end
       range = [from, (to || 'HEAD')].join('^..')
-- 
cgit v0.10.2


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