On Python 3.7 and master, test_strings() of test_gdb fails if gdb uses Python 3.6 (before UTF-8 Mode and C locale coercion):
* gdb uses ASCII encoding for stdout
* tested Python uses UTF-8 thanks to the UTF-8 Mode and/or C locale coercion
vstinner@apu$ LC_ALL=C ./python -m test -v test_gdb -m test_strings
== CPython 3.7.0+ (heads/3.7:65ef7425a3, Aug 28 2018, 16:29:30) [GCC 8.1.1 20180712 (Red Hat 8.1.1-5)]
== Linux-4.17.6-200.fc28.x86_64-x86_64-with-fedora-28-Twenty_Eight little-endian
== cwd: /home/vstinner/prog/python/3.7/build/test_python_21689
== CPU count: 8
== encodings: locale=UTF-8, FS=utf-8
Run tests sequentially
0:00:00 load avg: 0.35 [1/1] test_gdb
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test_strings (test.test_gdb.PrettyPrintTests)
Verify the pretty-printing of unicode strings ... FAIL
======================================================================
FAIL: test_strings (test.test_gdb.PrettyPrintTests)
Verify the pretty-printing of unicode strings
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/vstinner/prog/python/3.7/Lib/test/test_gdb.py", line 331, in test_strings
check_repr('\u2620')
File "/home/vstinner/prog/python/3.7/Lib/test/test_gdb.py", line 323, in check_repr
self.assertGdbRepr(text)
File "/home/vstinner/prog/python/3.7/Lib/test/test_gdb.py", line 271, in assertGdbRepr
% (gdb_repr, exp_repr, gdb_output)))
AssertionError: "'\\u2620'" != "'☠'"
- '\u2620'
+ '☠'
: "'\\u2620'" did not equal expected "'☠'"; full output was:
Breakpoint 1 at 0x52fc1b: file Python/bltinmodule.c, line 1216.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Breakpoint 1, builtin_id (self=, v='\u2620') at Python/bltinmodule.c:1216
1216 return PyLong_FromVoidPtr(v);
#0 builtin_id (self=, v='\u2620') at Python/bltinmodule.c:1216
----------------------------------------------------------------------
Ran 1 test in 1.030s
FAILED (failures=1)
test test_gdb failed
test_gdb failed
== Tests result: FAILURE ==
1 test failed:
test_gdb
Total duration: 1 sec 422 ms
Tests result: FAILURE
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