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bpo-37388: Development mode check encoding and errors (GH-14341)

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In development mode and in debug build, encoding and errors arguments
are now checked on string encoding and decoding operations. Examples:
open(), str.encode() and bytes.decode().

By default, for best performances, the errors argument is only
checked at the first encoding/decoding error, and the encoding
argument is sometimes ignored for empty strings.
This commit is contained in:
Victor Stinner 2019-06-26 00:51:05 +02:00 • committed by GitHub
parent e1a63c4f21
commit 22eb689cf3
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10 changed files with 315 additions and 6 deletions
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7
Doc/using/cmdline.rst
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@ -429,6 +429,9 @@ Miscellaneous options
not be more verbose than the default if the code is correct: new warnings
are only emitted when an issue is detected. Effect of the developer mode:
* Check *encoding* and *errors* arguments on string encoding and decoding
operations. Examples: :func:`open`, :meth:`str.encode` and
:meth:`bytes.decode`.
* Add ``default`` warning filter, as :option:`-W` ``default``.
* Install debug hooks on memory allocators: see the
:c:func:`PyMem_SetupDebugHooks` C function.
@ -469,6 +472,10 @@ Miscellaneous options
The ``-X pycache_prefix`` option. The ``-X dev`` option now logs
``close()`` exceptions in :class:`io.IOBase` destructor.
.. versionchanged:: 3.9
Using ``-X dev`` option, check *encoding* and *errors* arguments on
string encoding and decoding operations.
Options you shouldn't use
~~~~~~~~~~~~~~~~~~~~~~~~~