[ruby-core:95924] [Ruby master Bug#16361] TestEnv#test_fetch failure

Issue #16361 has been updated by mame (Yusuke Endoh).


I cannot reproduce the issue with ruby 2.7.0-preview3.

```
$ make test-all TESTS=test/ruby/test_env.rb
fatal: not a git repository (or any of the parent directories): .git
./revision.h unchanged
config.status: creating ruby-runner.h
making mjit_build_dir.so
Run options: "--ruby=./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  -- --disable-gems" --excludes-dir=./test/excludes --name=!/memory_leak/

# Running tests:

Finished tests in 0.026560s, 1618.9994 tests/s, 40889.1485 assertions/s.
43 tests, 1086 assertions, 0 failures, 0 errors, 0 skips

ruby -v: ruby 2.7.0preview3 (2019-11-22 master 35608760ff) [x86_64-linux]
```

Could you elaborate on what you did?

----------------------------------------
Bug #16361: TestEnv#test_fetch failure
https://bugs.ruby-lang.org/issues/16361#change-82764

* Author: vo.x (Vit Ondruch)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.7.0dev (2019-11-22 master f9d20a1bf1) [x86_64-linux]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
I am facing following test suite error:

~~~
  1) Failure:
TestEnv#test_fetch [/builddir/build/BUILD/ruby-2.7.0-f9d20a1bf1/test/ruby/test_env.rb:123]:
[ruby-core:56062] [Feature #8649].
Expected Exception(KeyError) was raised, but the message doesn't match.
<"key not found: \"test\""> expected but was
<"key not found: \"test\"\n" + "Did you mean?  \"TESTS\"">.
~~~

Trying to execute this test independently, it passes just fine. So it seems that the did_you_mean gem is loaded unexpectedly on this place. I just tried:

~~~
mv test/optparse/test_did_you_mean.rb{,.bak}
~~~

since this is the latest addition IMO and the test suite passes just fine.

I am not really sure why it should fail on my setup and it probably does not fail in any other CI. Neither I am sure what would be the best option to fix this. The assertion could be updated to accept this message by simple sed:

~~~
sed -i "/'key not found: \"test\"'/ s/'/\//g" test/ruby/test_env.rb
~~~



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