(rather than `-m test.regrtest`)

Issue #11235: Fix OverflowError when trying to import a source file whose modification time doesn't fit in a 32-bit timestamp.

Issue #11235: Fix OverflowError when trying to import a source file whose modification time doesn't fit in a 32-bit timestamp.

target's type (file or directory).  The detection was buggy and made the
call non-atomic (therefore prone to race conditions).

target's type (file or directory).  The detection was buggy and made the
call non-atomic (therefore prone to race conditions).

Move wallclock() at the end.

may return the same time.

I had to move the static identifier code from unicodeobject.h to object.h in
order for this to work.

have it as a library function.

an actual function.

"oops" while rearranging the #defines.

Many lack readdir64, use readdir.  Only use readdir64 on solaris where
it is required to work around a solaris bug.

suboptimal by closing all possible file descriptors rather than just
the open ones in the child process before exec().

It now closes only the open fds when it is possible to safely determine what
those are.

suboptimal by closing all possible file descriptors rather than just
the open ones in the child process before exec().

It now closes only the open fds when it is possible to safely determine what
those are.