FormattedTB causes UnicodeDecodeError when PyTorch is used #10428
Description
The code below should get into debugger after AttributeError "list object has no attribute norm". Instead if crashes during formatting of the traceback with UnicodeDecodeError (it seems it tries to call str on all the tensors in the list passed as an argument).
import sys
import IPython
import torch
def norm(tensor):
return tensor.norm(2, dim = 1)
sys.excepthook = IPython.core.ultratb.FormattedTB(mode = 'Verbose', color_scheme = 'Linux', call_pdb = 1)
embeddings = [torch.Tensor(2000, 20) for i in range(50)]
norm(embeddings)Error in sys.excepthook:
Traceback (most recent call last):
File ".../lib/python2.7/site-packages/IPython/core/ultratb.py", line 1268, in __call__
self.handler((etype, evalue, etb))
File ".../lib/python2.7/site-packages/IPython/core/ultratb.py", line 1257, in handler
ostream.write(self.text(etype, evalue, etb))
File ".../lib/python2.7/site-packages/IPython/core/ultratb.py", line 567, in text
tb_offset, context)
File ".../lib/python2.7/site-packages/IPython/core/ultratb.py", line 1320, in structured_traceback
self, etype, value, tb, tb_offset, number_of_lines_of_context
File ".../lib/python2.7/site-packages/IPython/core/ultratb.py", line 1170, in structured_traceback
tb_offset)
File ".../lib/python2.7/site-packages/IPython/core/ultratb.py", line 1115, in format_exception_as_a_whole
frames = self.format_records(records, last_unique, recursion_repeat)
File ".../lib/python2.7/site-packages/IPython/core/ultratb.py", line 842, in format_records
frames.append(self.format_record(*r))
File ".../lib/python2.7/site-packages/IPython/core/ultratb.py", line 1012, in format_record
lvals.append(tpl_name_val % (name, value))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 204: ordinal not in range(128)
Original exception was:
Traceback (most recent call last):
File "test.py", line 10, in <module>
norm(embeddings)
File "test.py", line 6, in norm
return tensor.norm(2, dim = 1)
AttributeError: 'list' object has no attribute 'norm'
IPython version: 5.3.0, Python version: 2.7.12, PyTorch tag is 7f03182