1636865 - ImportError: bad magic number in 'ply'

Status: RESOLVED WONTFIX

(Firefox Build System :: General, defect)

Description

[Simon Giesecke [:sg] [he/him]]

 0:33.83 Traceback (most recent call last):
 0:33.83   File "/home/simon/work/refactor/ipc/ipdl/ipdl.py", line 12, in <module>
 0:33.83     import ipdl
 0:33.83   File "/home/simon/work/refactor/build/mach_bootstrap.py", line 475, in __call__
 0:33.83     module = self._original_import(name, globals, locals, fromlist, level)
 0:33.83   File "/home/simon/work/refactor/ipc/ipdl/ipdl/__init__.py", line 16, in <module>
 0:33.83     from ipdl.parser import Parser, ParseError
 0:33.83   File "/home/simon/work/refactor/build/mach_bootstrap.py", line 475, in __call__
 0:33.83     module = self._original_import(name, globals, locals, fromlist, level)
 0:33.83   File "/home/simon/work/refactor/ipc/ipdl/ipdl/parser.py", line 6, in <module>
 0:33.83     from ply import lex, yacc
 0:33.83   File "/home/simon/work/refactor/build/mach_bootstrap.py", line 475, in __call__
 0:33.83     module = self._original_import(name, globals, locals, fromlist, level)
 0:33.83 ImportError: bad magic number in 'ply': b'\x03\xf3\r\n'

mach clobber solved this issue, though.

Comment 1

[Ricky Stewart]

Yeah, this sort of stuff is going to happen when Python scripts get moved around, which is something that happened in a push over the weekend.

In the future, mach clobber python is a more granular way to fix the actual problem (i.e., bad .pyc files) without blowing away literally all your build artifacts.