Run fails if the built app contains more than 65535 files or is over 2GB

[pombredanne]

I am trying to build an app for scancode-toolkit and while the build works fine, the built app is failing to run with this error:

$ python3 scancode
....python3: can't find '__main__' module in 'scancode'

I scratched my head and I think this may be subject to these issues python/cpython#77140 and python/cpython#89739

scancode-toolkit happens to contain a good number of data files (~ 68K)

What I did as a proof was to:

1. unzip the built app
2. remove enough files to go below the 65K limit
3. rezip and run the app... and things work fine

Since shiv depends on the boostrapping mechanisms of Python zip importer, this is dependent on @thatch Zip64 support in import being merged in python/cpython#94146 ... therefore I am not sure that there is anything to do here beyond some documentation.

[pombredanne]

FWIW, there is a similar problem with the same root cause when using large zips (over 2GB) .... this is reported elsewhere in pex-tool/pex#958