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-rw-r--r--lib/optparse.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/optparse.rb b/lib/optparse.rb
index 417997d9bb..80b16fa18d 100644
--- a/lib/optparse.rb
+++ b/lib/optparse.rb
@@ -1474,6 +1474,7 @@ class OptionParser
#
def environment(env = File.basename($0, '.*'))
env = ENV[env] || ENV[env.upcase] or return
+ require 'shellwords'
parse(*Shellwords.shellwords(env))
end