Difficult time to deal with crash files from different nipype versions

[anibalsolon]

Summary

When using CLI utility to open a crash file, if it was generated in a different nipype version, it may show strange/unrelated errors.

Actual behavior

Exceptions from different reasons are shown when a crash file is opened with a different nipype version than the one that generated the crash.

Expected behavior

Better deal with this version difference, at least showing that there is a problem to the user.

How to replicate the behavior

Try to open a crash file from a different nipype version, especially when the classes within the crash were changed.

Script/Workflow details

N/A

Platform details:

Please paste the output of: python -c "import nipype; print(nipype.get_info()); print(nipype.__version__)"

{
	'pkg_path': '/home/anibalsolon/Documents/nipype/anibalsolon/nipype',
	'commit_source': 'repository',
	'commit_hash': 'b5d79b4',
	'nipype_version': '1.1.0-dev+gb5d79b4',
	'sys_version': '3.6.4 |Anaconda custom (64-bit)| (default, Jan 16 2018, 18:10:19) \n[GCC 7.2.0]',
	'sys_executable': '/opt/anaconda3/bin/python',
	'sys_platform': 'linux',
	'numpy_version': '1.14.0',
	'scipy_version': '1.0.0',
	'networkx_version': '2.1',
	'nibabel_version': '2.2.1',
	'traits_version': '4.6.0'
}
1.1.0-dev+gb5d79b4```

### Execution environment

Choose one
- My python environment outside container

[mgxd]

@anibalsolon could you show an example traceback of opening a crashfile generated by a different nipype version?

[anibalsolon]

Hi @mgxd , sure!

This is an error generated on Nipype@0.13.1:

Traceback (most recent call last):
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/bin/nipypecli", line 11, in <module>
    sys.exit(cli())
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/nipype/scripts/cli.py", line 76, in crash
    display_crash_file(crashfile, rerun, debug, dir)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/nipype/scripts/crash_files.py", line 51, in display_crash_file
    crash_data = loadcrash(crashfile)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/nipype/utils/filemanip.py", line 556, in loadcrash
    return loadpkl(infile)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/nipype/utils/filemanip.py", line 578, in loadpkl
    unpkl = pickle.load(pkl_file)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/pickle.py", line 1384, in load
    return Unpickler(file).load()
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/pickle.py", line 864, in load
    dispatch[key](self)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/pickle.py", line 1223, in load_build
    setstate(state)
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/traits/has_traits.py", line 1441, in __setstate__
    self.trait_set( trait_change_notify = trait_change_notify, **state )
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/traits/has_traits.py", line 1544, in trait_set
    setattr( self, name, value )
  File "/opt/anaconda3/envs/C-PAC+1.2.0_dev/lib/python2.7/site-packages/nipype/interfaces/traits_extension.py", line 92, in validate
    self.info_text, value))
traits.trait_errors.TraitError: The trait 'in_file' of a SkullStripInputSpec instance is an existing file name, but the path  '/Users/anibalsolon/run/cpac/v120/v120_test2/w/resting_preproc_0050642_ses-1/anat_preproc_0/anat_skullstrip/sub-0050642_T1w_resample.nii.gz' does not exist.

and this is what happens when I try to open it with the CLI utility using Nipype@1.0.4:

/opt/anaconda3/lib/python3.6/site-packages/h5py/__init__.py:36: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`.
  from ._conv import register_converters as _register_converters
Traceback (most recent call last):
  File "/opt/anaconda3/bin/nipypecli", line 11, in <module>
    sys.exit(cli())
  File "/opt/anaconda3/lib/python3.6/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/opt/anaconda3/lib/python3.6/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/opt/anaconda3/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/opt/anaconda3/lib/python3.6/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/opt/anaconda3/lib/python3.6/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/opt/anaconda3/lib/python3.6/site-packages/nipype/scripts/cli.py", line 94, in crash
    display_crash_file(crashfile, rerun, debug, dir)
  File "/opt/anaconda3/lib/python3.6/site-packages/nipype/scripts/crash_files.py", line 51, in display_crash_file
    crash_data = loadcrash(crashfile)
  File "/opt/anaconda3/lib/python3.6/site-packages/nipype/utils/filemanip.py", line 631, in loadcrash
    return loadpkl(infile)
  File "/opt/anaconda3/lib/python3.6/site-packages/nipype/utils/filemanip.py", line 646, in loadpkl
    unpkl = pickle.load(pkl_file)
  File "/opt/anaconda3/lib/python3.6/site-packages/traits/has_traits.py", line 1440, in __setstate__
    self.trait_set( trait_change_notify = trait_change_notify, **state )
  File "/opt/anaconda3/lib/python3.6/site-packages/traits/has_traits.py", line 1543, in trait_set
    setattr( self, name, value )
  File "/opt/anaconda3/lib/python3.6/site-packages/traits/trait_types.py", line 2625, in validate
    return TraitDictObject( self, object, name, value )
  File "/opt/anaconda3/lib/python3.6/site-packages/traits/trait_handlers.py", line 3063, in __init__
    dict.update( self, self._validate_dic( value ) )
  File "/opt/anaconda3/lib/python3.6/site-packages/traits/trait_handlers.py", line 3263, in _validate_dic
    raise excp
  File "/opt/anaconda3/lib/python3.6/site-packages/traits/trait_handlers.py", line 3260, in _validate_dic
    value = value_validate( object, name, value )
  File "/opt/anaconda3/lib/python3.6/site-packages/traits/trait_handlers.py", line 1983, in validate
    return self.slow_validate( object, name, value )
  File "/opt/anaconda3/lib/python3.6/site-packages/traits/trait_handlers.py", line 1991, in slow_validate
    self.error( object, name, value )
  File "/opt/anaconda3/lib/python3.6/site-packages/traits/trait_handlers.py", line 172, in error
    value )
traits.trait_errors.TraitError: Each value of the 'environ' trait of a SkullStripInputSpec instance must be a bytes or None or a value of class 'str', but a value of 1' <class 'future.types.newstr.newstr'> was specified.