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Error in ast.unparse on nightly CPython #14
Description
Via #13, we found https://travis-ci.com/github/Zac-HD/stdlib-property-tests/jobs/335728827#L232-L259
ERROR: test_ast_unparse (test_source_code.TestAST)
Unparsing always produces code which parses back to the same ast.
----------------------------------------------------------------------
File "<string>", line 1
SyntaxError: unexpected character after line continuation character
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/home/travis/build/Zac-HD/stdlib-property-tests/tests/test_source_code.py", line 20, in test_ast_unparse
@given(source_code=hypothesmith.from_grammar())
File "/home/travis/build/Zac-HD/stdlib-property-tests/.tox/test/lib/python3.9/site-packages/hypothesis/core.py", line 1102, in wrapped_test
raise the_error_hypothesis_found
File "/home/travis/build/Zac-HD/stdlib-property-tests/.tox/test/lib/python3.9/site-packages/hypothesmith/syntactic.py", line 86, in draw_symbol
super().draw_symbol(data, symbol, draw_state)
File "/home/travis/build/Zac-HD/stdlib-property-tests/.tox/test/lib/python3.9/site-packages/hypothesis/extra/lark.py", line 175, in draw_symbol
self.draw_symbol(data, e, draw_state)
File "/home/travis/build/Zac-HD/stdlib-property-tests/.tox/test/lib/python3.9/site-packages/hypothesmith/syntactic.py", line 86, in draw_symbol
super().draw_symbol(data, symbol, draw_state)
File "/home/travis/build/Zac-HD/stdlib-property-tests/.tox/test/lib/python3.9/site-packages/hypothesis/extra/lark.py", line 175, in draw_symbol
self.draw_symbol(data, e, draw_state)
File "/home/travis/build/Zac-HD/stdlib-property-tests/.tox/test/lib/python3.9/site-packages/hypothesmith/syntactic.py", line 86, in draw_symbol
super().draw_symbol(data, symbol, draw_state)
File "/home/travis/build/Zac-HD/stdlib-property-tests/.tox/test/lib/python3.9/site-packages/hypothesis/extra/lark.py", line 175, in draw_symbol
self.draw_symbol(data, e, draw_state)
File "/home/travis/build/Zac-HD/stdlib-property-tests/.tox/test/lib/python3.9/site-packages/hypothesmith/syntactic.py", line 89, in draw_symbol
compile(
SystemError: <built-in function normalize> returned a result with an error setMaybe @pganssle has some idea what's happening here?
Activity
pganssle commentedon May 17, 2020
@Zac-HD Looks to me like an uncaught error in the C code in CPython, but because the error appears to be in
hypothesmith, I can't tell what the reproducing case is. I assume it's an error in CPython, possibly related to the new parser. Do you know how to get a more minimal reproducing case? I'm assuming there's a specific input tocompilethat would trigger this.Zac-HD commentedon May 17, 2020
...I think the easiest way to get some output might be to add a special print-this-on-error case to Hypothesmith, I don't have a CPython nightly handy but releasing a new library version is faster anyway 😂
Zac-HD commentedon May 17, 2020
is I think a reproducing case, if it printed properly and survived from travis.
If not, the latest version of Hypothesmith should now raise a more useful error, and if that fails too I'll need to finish rebuilding my desktop, get a proper dev environment set up, and hack on this properly.
pganssle commentedon May 17, 2020
I sent this to @pablogsal, he found the issue and posted a release blocker bug: https://bugs.python.org/issue40661
Zac-HD commentedon May 18, 2020
Also got this error,
unexpected error while attempting to compile 'import𤂴洍𗩺ꐥ𫅦隐𫢯.𣲕䧮럛𐪏𣕹𮡝.㙏𝗫𛅿𡩸𮘿𫶦\\\x0c\x0c\x0c\x0c \x0c \x0c\t\x0c\t \x0c\r\n\r\n' in mode=singleZac-HD commentedon Jun 6, 2020
Pretty sure this has been fixed upstream now 🙂