https://git.ruby-lang.org/ruby.git/commit/?id=da345adc1c

From da345adc1c9cb6182ee11c43853f67bb41aeea76 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@r...>
Date: Fri, 8 May 2020 14:27:41 +0900
Subject: `Open3.capture2e` raises exception when the command is not present.


diff --git a/test/rubygems/test_gem_ext_cmake_builder.rb b/test/rubygems/test_gem_ext_cmake_builder.rb
index 6d4c670..4af7de0 100644
--- a/test/rubygems/test_gem_ext_cmake_builder.rb
+++ b/test/rubygems/test_gem_ext_cmake_builder.rb
@@ -10,9 +10,11 @@ class TestGemExtCmakeBuilder < Gem::TestCase https://github.com/ruby/ruby/blob/trunk/test/rubygems/test_gem_ext_cmake_builder.rb#L10
     # Details: https://github.com/rubygems/rubygems/issues/1270#issuecomment-177368340
     skip "CmakeBuilder doesn't work on Windows." if Gem.win_platform?
 
-    _, status = Open3.capture2e('cmake')
-
-    skip 'cmake not present' unless status.success?
+    begin
+      _, status = Open3.capture2e('cmake')
+    rescue Errno::ENOENT
+      skip 'cmake not present'
+    end
 
     @ext = File.join @tempdir, 'ext'
     @dest_path = File.join @tempdir, 'prefix'
-- 
cgit v0.10.2


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