mypy fails while writing cache

[ronakts]

Thanks for taking the time for reporting an issue!

Before reporting an issue on dd-trace-py, please be sure to provide all
necessary information.

If you're hitting a bug, make sure that you're using the latest version of this
library.

Which version of dd-trace-py are you using?

0.60.1

Which version of pip are you using?

pip 22.0.4

ddtrace requires pip>=18 to install one of our pre-built wheels

Which version of the libraries are you using?

You can copy/paste the output of pip freeze here.

How can we reproduce your problem?

I randomly hit this issue when I run with mypy cache and do not encountered this issue when I run mypy without use of cache.

What is the result that you get?

mypy fails with this error:

LOG:  Processing SCC singleton (ddtrace.internal.atexit) as inherently stale
LOG:  Writing ddtrace.internal.atexit /opt/conda/envs/********3/lib/python3.10/site-packages/ddtrace/internal/atexit.py ddtrace/internal/atexit.meta.json ddtrace/internal/atexit.data.json
LOG:  Build finished in 73.491 seconds with 8396 modules, and 0 errors
Traceback (most recent call last):
  File "/opt/conda/envs/********3/lib/python3.10/runpy.py", line 196, in _run_module_as_****
    return _run_code(code, ****_globals, None,
  File "/opt/conda/envs/********3/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/opt/conda/envs/********3/lib/python3.10/site-packages/mypy/__****__.py", line 34, in <module>
    console_entry()
  File "/opt/conda/envs/********3/lib/python3.10/site-packages/mypy/__****__.py", line 12, in console_entry
    ****(None, sys.stdout, sys.stderr)
  File "mypy/****.py", line 96, in ****
  File "mypy/****.py", line 173, in run_build
  File "mypy/build.py", line 180, in build
  File "mypy/build.py", line 256, in _build
  File "mypy/build.py", line 2727, in dispatch
  File "mypy/build.py", line 3075, in process_graph
  File "mypy/build.py", line 3193, in process_stale_scc
  File "mypy/build.py", line 2311, in write_cache
  File "mypy/build.py", line 1488, in write_cache
  File "mypy/nodes.py", line 344, in serialize
  File "mypy/nodes.py", line 3367, in serialize
  File "mypy/nodes.py", line 3304, in serialize
  File "mypy/nodes.py", line 956, in serialize
  File "mypy/types.py", line 1482, in serialize
  File "mypy/types.py", line 611, in serialize
  File "mypy/types.py", line 1079, in serialize
  File "mypy/nodes.py", line 2679, in fullname
AttributeError: attribute '_fullname' of 'TypeInfo' undefined


Exited with code exit status 1

What is the result that you expected?

I assume that mypy should not throw this error while writing cache for ddtrace/internal/atexit.py

[brettlangdon]

@ronakts thank you for reporting. It looks like this is an issue with mypy that is already reported.

python/mypy#12475