Issue #18002 has been updated by jaruga (Jun Aruga).


Here is the status under the `/tmp/rubytest1` (`tmpdir`).

```
ruby01|s390x$ unset LC_ALL
ruby01|s390x$ ls -l /tmp/rubytest1
total 0
-rw-r--r-- 1 jaruga sudo 0 Jul 12 12:21 'A'$'\221'
lrwxrwxrwx 1 jaruga sudo 3 Jul 12 12:21  x -> 'A'$'\221'
```


----------------------------------------
Bug #18002: s390x: Tests failing without LC_ALL env
https://bugs.ruby-lang.org/issues/18002#change-92876

* Author: jaruga (Jun Aruga)
* Status: Open
* Priority: Normal
* Assignee: jaruga (Jun Aruga)
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
The following failures happened in RubyCI on our s390x Ubuntu focal server.
On the server, RubyCI (ruby/chkbuild) is executed with LC_ALL not set, by cron.
I found the unset `LC_ALL` causes the failures on the s390x server. This does not happen on x86_64 Fedora 33 on my local machine.

I was able to reproduce the failures on the master branch `dbd1887d04f5ff7c2a1f0a27d7339133a` on the server.

## Reproducer

```
$ uname -m
s390x

$ autoconf

$ ./configure \
  --prefix=${HOME}/local/ruby-master-9d96837 \
  --enable-shared

$ make
```

### Without `LC_ALL`

Then run the tests without `LC_ALL`.

```
$ unset LC_ALL

$ echo $LC_ALL
  <= empty
```

```
$ make test-all TESTS="-v test/ruby/test_file.rb -n TestFile#test_realpath_encoding"
Run options:-
  --seed=85060
  "--ruby=./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  -- --disable-gems"
  --excludes-dir=./test/excludes
  --name=!/memory_leak/
  -v
  -n
  TestFile#test_realpath_encoding

# Running tests:

[1/0] TestFile#test_realpath_encoding = 0.00 s

  1) Failure:
TestFile#test_realpath_encoding [/home/jaruga/git/ruby/ruby2/test/ruby/test_file.rb:284]:
<"/tmp/rubytest-realpath20210621-3365652-za1wql/A\u0391\u0410\u0531\u10A0\u05D0\u2C00\u3042"> expected but was
<"/tmp/rubytest-realpath20210621-3365652-za1wql/A\u00CE\u0091\u00D0\u0090\u00D4\u00B1\u00E1\u0082\u00A0\u00D7\u0090\u00E2\u00B0\u0080\u00E3\u0081\u0082">.

Finished tests in 0.007217s, 138.5674 tests/s, 692.8372 assertions/s.
1 tests, 5 assertions, 1 failures, 0 errors, 0 skips
ruby -v: ruby 3.1.0dev (2021-06-18T10:13:36Z master 9d96837dbd) [s390x-linux]
make: *** [uncommon.mk:803: yes-test-all] Error 1
```

```
$ make test-all TESTS="-v test/irb/test_context.rb -n TestIRB::TestContext#test_eval_input_with_invalid_byte_sequence_exception"
Run options:-
  --seed=74635
  "--ruby=./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  -- --disable-gems"
  --excludes-dir=./test/excludes
  --name=!/memory_leak/
  -v
  -n
  TestIRB::TestContext#test_eval_input_with_invalid_byte_sequence_exception

# Running tests:

[1/0] TestIRB::TestContext#test_eval_input_with_invalid_byte_sequence_exception = 0.00 s

  1) Failure:
TestIRB::TestContext#test_eval_input_with_invalid_byte_sequence_exception [/home/jaruga/git/ruby/ruby2/test/irb/test_context.rb:505]:
Expected /\(irb\):1:in `fuga': A\\xF3B \(RuntimeError\)\n/
to match
  "(irb):1:in `fuga': AB (RuntimeError)\n"+
  "\tfrom (irb):1:in `hoge'\n"+
  "\tfrom (irb):1:in `<main>'\n"
after 1 patterns with 0 characters.

Finished tests in 0.007640s, 130.8819 tests/s, 785.2916 assertions/s.
1 tests, 6 assertions, 1 failures, 0 errors, 0 skips
ruby -v: ruby 3.1.0dev (2021-06-18T10:13:36Z master 9d96837dbd) [s390x-linux]
make: *** [uncommon.mk:803: yes-test-all] Error 1
```

### With `export LC_ALL=C`


On the `export LC_ALL=C` (`LC_ALL=C` without `export` is not enough to pass the tests)

```
$ export LC_ALL=C

$ echo $LC_ALL
C
```

```
$ make test-all TESTS="-v test/ruby/test_file.rb -n TestFile#test_realpath_encoding"
Run options: 
  --seed=89696
  "--ruby=./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  -- --disable-gems"
  --excludes-dir=./test/excludes
  --name=!/memory_leak/
  -v
  -n
  TestFile#test_realpath_encoding

# Running tests:

[1/0] TestFile#test_realpath_encoding = 0.00 s
Finished tests in 0.004715s, 212.0691 tests/s, 1060.3455 assertions/s.
1 tests, 5 assertions, 0 failures, 0 errors, 0 skips

ruby -v: ruby 3.1.0dev (2021-06-18T10:13:36Z master 9d96837dbd) [s390x-linux]
```

```
$ make test-all TESTS="-v test/irb/test_context.rb -n TestIRB::TestContext#test_eval_input_with_invalid_byte_sequence_exception"
Run options: 
  --seed=67965
  "--ruby=./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  -- --disable-gems"
  --excludes-dir=./test/excludes
  --name=!/memory_leak/
  -v
  -n
  TestIRB::TestContext#test_eval_input_with_invalid_byte_sequence_exception

# Running tests:

[1/0] TestIRB::TestContext#test_eval_input_with_invalid_byte_sequence_exception = 0.00 s
Finished tests in 0.007877s, 126.9448 tests/s, 761.6689 assertions/s.
1 tests, 6 assertions, 0 failures, 0 errors, 0 skips

ruby -v: ruby 3.1.0dev (2021-06-18T10:13:36Z master 9d96837dbd) [s390x-linux]
```

## Possible Solution

Fix the tests not depending on the external LC_ALL condition.






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