[ruby-core:93641] [Ruby master Bug#15986] `TestJIT#test_block_handler_with_possible_frame_omitted_inlining` fails on s390x and aarch64

Issue #15986 has been updated by mame (Yusuke Endoh).


FYI: RubyCI platforms include [RHEL 7.1 s390x][1] and [Ubuntu armv8 (aarch64)][2], and their results are both green at the present time.  So the cause would be the other factor than CPU, I guess.

[1]: https://rubyci.org/logs/rubyci.s3.amazonaws.com/rhel_zlinux/ruby-master/log/20190709T133302Z.log.html.gz#cpu-info
[2]: https://rubyci.org/logs/rubyci.s3.amazonaws.com/scw-ad7f67/ruby-master/log/20190709T085405Z.log.html.gz#uname

----------------------------------------
Bug #15986: `TestJIT#test_block_handler_with_possible_frame_omitted_inlining` fails on s390x and aarch64
https://bugs.ruby-lang.org/issues/15986#change-79249

* Author: vo.x (Vit Ondruch)
* Status: Feedback
* Priority: Normal
* Assignee: k0kubun (Takashi Kokubun)
* Target version: 
* ruby -v: ruby -v: ruby 2.7.0dev (2019-07-04T10:34:08Z master d9f8b88b47) [s390x-linux]
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
I am trying to build the Ruby 2.7 snapshot for Fedora Rawhide [1], but I observe the following test failure on s390x and aarch64 platforms:

~~~
  1) Failure:
TestJIT#test_block_handler_with_possible_frame_omitted_inlining [/builddir/build/BUILD/ruby-2.7.0-d9f8b88b47/test/ruby/test_jit.rb:846]:
Expected 2 times of JIT success, but succeeded 1 times.
script:
"""
def multiply(a, b)
  a *= b
end
3.times do
  p multiply(7.0, 10.0)
end
"""
stderr:
"""
JIT success (65.9ms): block in <main>@-e:6 -> /tmp/_ruby_mjit_p54157u0.c
gcc: fatal error: output filename may not be empty
compilation terminated.
Successful MJIT finish
"""
..
<2> expected but was
<1>.
Finished tests in 440.892116s, 47.2746 tests/s, 6150.4071 assertions/s.
~~~


[1]: https://koji.fedoraproject.org/koji/taskinfo?taskID=36030301



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