Unicode decode error

[vmig]

tuna cannot parse a cProfile dump file. This is a stack trace:

$ tuna cprofile.dat
Traceback (most recent call last):
  File "~/.virtualenvs/profiling/bin/tuna", line 11, in <module>
    sys.exit(main())
  File "~/.virtualenvs/profiling/lib/python3.6/site-packages/tuna/cli.py", line 13, in main
    start_server(args.infile, args.browser)
  File "~/.virtualenvs/profiling/lib/python3.6/site-packages/tuna/main.py", line 134, in start_server
    data = read(prof_filename)
  File "~/.virtualenvs/profiling/lib/python3.6/site-packages/tuna/main.py", line 21, in read
    return read_import_profile(filename)
  File "~/.virtualenvs/profiling/lib/python3.6/site-packages/tuna/main.py", line 93, in read_import_profile
    assert next(import_lines) == "self [us] | cumulative | imported package"
  File "~/.virtualenvs/profiling/lib/python3.6/site-packages/tuna/main.py", line 89, in <genexpr>
    line[len("import time: ") :].rstrip()
  File "~/.virtualenvs/profiling/lib/python3.6/codecs.py", line 321, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xfb in position 0: invalid start byte

[nschloe]

I cannot reproduce this without the profile.

[vmig]

This is an example of a cProfile dump.
cprofile.log

[nschloe]

Alright, I fixed a bug that prevented your file from being read. Another error though pertains:

AssertionError: The default root node `<built-in method builtins.exec>` was not found in the profile. 

Not sure why this node isn't present in your profile.

[vmig]

I generated the profile file inside a code. This is an example:

profile = cProfile.Profile()
profile.enable()
result = expensive_function()
profile.disable()
profile.dump_stats("cprofile.log")

In this case the <built-in method builtins.exec> is absent.