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`-ldebug` does not provide any more informations … any ideas ?

No ideas beyond a brute foce `./pants clean-all`.  When building one jar from more than one input jar the jar tool we use attempts to read the jar entries directly from the input jars without unpacking them. It sounds like the error is occuring in this bit of trickery (it's a speed hack).

I already tried the `./pants clean-all` and even to clean the coursier cache :s

i would expect you would have to `rm /home/lorilan/dev/platform/dist/foo.jar`, or `rm -r dist/`. `./pants clean-all` deletes the local cache and some other stuff but not `dist/`

i actually had this exact same error message like down to the expected bytes but it was on a command line which produced a `.tar.gz` and it would fail i think because i had interrupted the `tar` command and the file was invalid -- removing the file resolved this

thanks for the reply. Actually a change in the build I was not aware of caused this crash. Not sure exactly what caused it. I cleaned the changes and now it works !