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bpo-32230: Set sys.warnoptions with -X dev (#4820)

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Rather than supporting dev mode directly in the warnings module, this
instead adjusts the initialisation code to add an extra 'default'
entry to sys.warnoptions when dev mode is enabled.

This ensures that dev mode behaves *exactly* as if `-Wdefault` had
been passed on the command line, including in the way it interacts
with `sys.warnoptions`, and with other command line flags like `-bb`.

Fix also bpo-20361: have -b & -bb options take precedence over any
other warnings options.

Patch written by Nick Coghlan, with minor modifications of Victor Stinner.
This commit is contained in:
Victor Stinner 2017-12-12 22:59:48 +01:00 • committed by GitHub
parent b748e3b258
commit 747f48e2e9
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12 changed files with 224 additions and 124 deletions
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3
Doc/tools/susp-ignored.csv
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@ -327,3 +327,6 @@ whatsnew/changelog,,:end,str[start:end]
library/binascii,,`,'`'
library/uu,,`,'`'
whatsnew/3.7,,`,'`'
whatsnew/3.7,,::,error::BytesWarning
whatsnew/changelog,,::,error::BytesWarning
whatsnew/changelog,,::,default::BytesWarning

1 c-api/arg :ref PyArg_ParseTuple(args, "O|O:ref", &object, &callback)
327 library/binascii ` '`'
328 library/uu ` '`'
329 whatsnew/3.7 ` '`'
330 whatsnew/3.7 :: error::BytesWarning
331 whatsnew/changelog :: error::BytesWarning
332 whatsnew/changelog :: default::BytesWarning