Patch by Johannes Ebke.

Thanks to Ville Skyttä for the patch.

attributes.

new exception with setting current exception as __cause__.

_PyErr_FormatFromCause(exception, format, args...) is equivalent to Python

    raise exception(format % args) from sys.exc_info()[1]

Patch by Mariatta Wijaya.

C99 inline semantics don't work everywhere. (https://bugs.python.org/issue28092)
We don't want these to have external visibility anyway.

Patch by Vajrasky Kok.

Thanks to Stéphane Wirtel!

Based on patch by Masayuki Yamamoto.

Patch written by Julien Palard.

or missing the effective gid.

Patch by Roman Podoliaka.