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[3.9] bpo-45494: Fix parser crash when reporting errors involving invalid continuation characters (GH-28993) #29071

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Merged
merged 2 commits into from
Oct 20, 2021
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[3.9] bpo-45494: Fix parser crash when reporting errors involving invalid continuation characters (GH-28993) #29071

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[3.9] bpo-45494: Fix parser crash when reporting errors involving inv…
pablogsal Oct 19, 2021
aa41b1b
yeah well okay, let's point at a crazy location
ambv Oct 19, 2021
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4 changes: 4 additions & 0 deletions Lib/test/test_exceptions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -193,6 +193,10 @@ def check(self, src, lineno, offset, encoding='utf-8'):
line = src.split('\n')[lineno-1]
self.assertIn(line, cm.exception.text)

def test_error_offset_continuation_characters(self):
check = self.check
check('"\\\n"(1 for c in I,\\\n\\', 3, 22)
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@pablogsal pablogsal Oct 19, 2021

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This is unfortunately a regression:

>>> try:
...   compile('"\\\n"(1 for c in I,\\\n\\', "", "exec")
... except SyntaxError as e:
...   f = e
...
>>> f.lineno
2
>>> f.offset
3


def testSyntaxErrorOffset(self):
check = self.check
check('def fact(x):\n\treturn x!\n', 2, 10)
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2021-10-16-17-27-48.bpo-45494.vMt1g4.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Fix parser crash when reporting errors involving invalid continuation
characters. Patch by Pablo Galindo.
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