binary mode, instead of text mode using the locale encoding, to avoid encoding
issues.

instead of text mode using the locale encoding, to avoid encoding issues.

binary mode, instead of text mode using the locale encoding, to support other
encodings than UTF-8 (scripts using the coding cookie).

instead of text mode using the locale encoding, to support other encodings than
UTF-8 (scripts using the coding cookie).

mode instead of the text mode (using the locale encoding) to avoid encoding
issues.

of the text mode (using the locale encoding) to avoid encoding issues.

This requires some trickery to properly save the exception state if the
generator creates its own exception state.

This prevents generator exception state from leaking into the caller.

Closes #12475.

qsize() raises NotImplementedError on OS X, don't use it.

Original patch by Nicolas Estibals.  My tweaks to the patch were mostly
style/cosmetic, and adding more tests.

freed by the garbage collector while the Heap lock is held.