[ruby/reline] Make a log file on windows if debug env is set

https://github.com/ruby/reline/commit/dff30a2d44

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/reline.rb b/lib/reline.rb
index 6a5f9b2390..339b8bc8d7 100644
--- a/lib/reline.rb
+++ b/lib/reline.rb
@@ -200,7 +200,11 @@ module Reline
 
     private def inner_readline(prompt, add_hist, multiline, &confirm_multiline_termination)
       if ENV['RELINE_STDERR_TTY']
-        $stderr.reopen(ENV['RELINE_STDERR_TTY'], 'w')
+        if Reline::IOGate.win?
+          $stderr = File.open(ENV['RELINE_STDERR_TTY'], 'a')
+        else
+          $stderr.reopen(ENV['RELINE_STDERR_TTY'], 'w')
+        end
         $stderr.sync = true
         $stderr.puts "Reline is used by #{Process.pid}"
       end