(closes #18147)

(closes #18147)

   party sources. Run aclocal to import it to aclocal.m4 and add aclocal.m4
   to the archive.

   party sources. Run aclocal to import it to aclocal.m4 and add aclocal.m4
   to the archive.

array that's larger than 50% of the available RAM.

Patch by Médéric Boquien.

The concept of .pyo files no longer exists. Now .pyc files have an
optional `opt-` tag which specifies if any extra optimizations beyond
the peepholer were applied.

Patch by Eugene Toder.

while it is holding a lock to a buffered I/O object, and the main thread
tries to use the same I/O object (typically stdout or stderr).  A fatal
error is emitted instead.

while it is holding a lock to a buffered I/O object, and the main thread
tries to use the same I/O object (typically stdout or stderr).  A fatal
error is emitted instead.

Using LF can a script to fail if it tries to use a label that is
split across 512 byte blocks.  Who knows why.

Patch by Juti Noppornpitak.

It's still not necessary to build, but may be useful to some.