debug print

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65018 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

appveyor.yml

@@ -62,6 +62,7 @@ for:
     - SET VS140COMNTOOLS=C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\
     - CALL SET vcvars=%%^VS%VS%COMNTOOLS^%%..\..\VC\vcvarsall.bat
     - SET vcvars
+    - dir C:\Program Files (x86)
     - '"%vcvars%" %Platform:x64=amd64%'
     - SET ruby_path=C:\Ruby%ruby_version:-x86=%
     - SET PATH=\usr\local\bin;%ruby_path%\bin;%PATH%;C:\msys64\mingw64\bin;C:\msys64\usr\bin