This required updating the code to use posix instead of os. This is
all being done to make bootstrapping easier to removing dependencies
that are kept in importlib.__init__ and thus outside of the single
file to bootstrap from.

Skip the test if we are unable to find an invalid time_t value.

is not available or its value cannot be represented

of ValueError on failure. time.ctime() and time.asctime() now raises an
OSError if localtime() failed.

does not need to be exposed from C code for bootstrapping reasons.

Closes #13859: Replaced reference to StandardError with reference to Exception. Thanks to Matt Joiner for spotting this and submitting a patch.

(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.