Eric V. Smith added the comment:
Serihy:
I had tried this approach earlier, but it doesn't work. With your -5.diff
patch, the output is (using Nick's test case):
$ rm -rf __pycache__/ ; ./python -Werror escape_warning.py
Traceback (most recent call last):
File "escape_warning.py", line 1, in <module>
import bad_escape
DeprecationWarning: invalid escape sequence \d
$
With my -4.diff patch, you get the desired full stack trace:
$ rm -rf __pycache__/ ; ./python -Wall escape_warning.py
Traceback (most recent call last):
File "escape_warning.py", line 1, in <module>
import bad_escape
File "/home/eric/local/python/cpython/bad_escape.py", line 1
print('\d')
^
SyntaxError: invalid escape sequence \d
$
The trick is: how to make the DeprecationWarning version produce output similar
to the SyntaxError case? Note that with DeprecationWarning, you don't see the
line in bad_escape.py that actually contains the string with the invalid escape.
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