Try installing bundler 2.x

protocolbuffers · Jan 8, 2020 · 5782756 · 5782756
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commit 5782756
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/kokoro/release/ruby/linux/ruby/ruby_build.sh b/kokoro/release/ruby/linux/ruby/ruby_build.sh
@@ -11,6 +11,7 @@ fi
 
 umask 0022
 pushd ruby
+gem install bundler -v 2.1.4
 bundle install && bundle exec rake gem:native
 ls pkg
 mv pkg/* $ARTIFACT_DIR