GeezerVison

zipimporter.get_filename() compiled source modules just to work out the
module's file name. find_spec() calls it through spec_from_loader(), so
importing a source module from a ZIP archive compiled it twice and emitted
every SyntaxWarning twice.

get_filename() now returns before reading or compiling the source.
As a result, a SyntaxError in a zipped source module is now raised by
exec_module() rather than by find_spec() or get_filename(), and
the source isn't compiled twice during import, which matches
the filesystem-based loaders.
(cherry picked from commit 230917f)

Co-authored-by: Harjoth Khara [email protected]

• Issue: Syntax warnings are duplicated in zipimport #141276