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| -rw-r--r-- | doc/contributing/testing_ruby.md | 12 |
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diff --git a/doc/contributing/testing_ruby.md b/doc/contributing/testing_ruby.md index 8decc24083..b8f3c004c9 100644 --- a/doc/contributing/testing_ruby.md +++ b/doc/contributing/testing_ruby.md @@ -142,3 +142,15 @@ We can run any of the make scripts [in parallel](building_ruby.md#label-Running+ ``` $ make test-bundler BUNDLER_SPECS=commands/exec_spec.rb ``` + +## Troubleshooting + +### Running test suites on s390x CPU Architecture + +If we see failing tests related to the zlib library on s390x CPU architecture, we can run the test suites with `DFLTCC=0` to pass: + +``` +DFLTCC=0 make check +``` + +The failures can happen with the zlib library applying the patch [madler/zlib#410](https://github.com/madler/zlib/pull/410) to enable the deflate algorithm producing a different compressed byte stream. We manage this issue at [[ruby-core:114942][Bug #19909]](https://bugs.ruby-lang.org/issues/19909). |