[BUG]: AttributeError: 'NoneType' object has no attribute 'lower'

[pfaion-soundhound]

Tracer Version(s)

3.10.1

Python Version(s)

3.13.5

Pip Version(s)

N/A (using uv)

Bug Report

I'm getting the following error log when cancelling my app with ctrl-c:

Exception ignored in atexit callback <bound method TelemetryWriter.app_shutdown of TelemetryWriter(status=<ServiceStatus.RUNNING: 'running'>, started=True)>:
Traceback (most recent call last):
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/writer.py", line 668, in app_shutdown
    self.periodic(force_flush=True, shutting_down=True)
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/writer.py", line 654, in periodic
    self._app_dependencies_loaded_event()
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/writer.py", line 414, in _app_dependencies_loaded_event
    packages = update_imported_dependencies(self._imported_dependencies, newly_imported_deps)
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/data.py", line 77, in update_imported_dependencies
    dists = get_module_distribution_versions(module_name)
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/packages.py", line 70, in get_module_distribution_versions
    dist_map = get_distributions()
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/utils/cache.py", line 149, in _
    raise exc
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/writer.py", line 749, in _telemetry_excepthook
    self.app_shutdown()
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/writer.py", line 668, in app_shutdown
    self.periodic(force_flush=True, shutting_down=True)
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/writer.py", line 654, in periodic
    self._app_dependencies_loaded_event()
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/writer.py", line 414, in _app_dependencies_loaded_event
    packages = update_imported_dependencies(self._imported_dependencies, newly_imported_deps)
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/data.py", line 77, in update_imported_dependencies
    dists = get_module_distribution_versions(module_name)
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/packages.py", line 70, in get_module_distribution_versions
    dist_map = get_distributions()
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/utils/cache.py", line 149, in _
    raise exc
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/writer.py", line 654, in periodic
    self._app_dependencies_loaded_event()
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/writer.py", line 414, in _app_dependencies_loaded_event
    packages = update_imported_dependencies(self._imported_dependencies, newly_imported_deps)
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/telemetry/data.py", line 77, in update_imported_dependencies
    dists = get_module_distribution_versions(module_name)
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/packages.py", line 70, in get_module_distribution_versions
    dist_map = get_distributions()
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/utils/cache.py", line 149, in _
    raise exc
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/utils/cache.py", line 141, in _
    retval = f()
  File "/myproject/.venv/lib/python3.13/site-packages/ddtrace/internal/packages.py", line 38, in get_distributions
    name = metadata["name"].lower()
AttributeError: 'NoneType' object has no attribute 'lower'

I think the issue is the following section of code:

dd-trace-py/ddtrace/internal/packages.py

Lines 37 to 38 in b17d958

	metadata = dist.metadata
	name = metadata["name"].lower()

that does not handle if .metadata is None.

Looking at the source of importlib_metadata, the type annotations state that the metadata can be None:
https://github.com/python/importlib_metadata/blob/95ecf2aa573a68d4624506f801ca70992a337f41/importlib_metadata/__init__.py#L514-L515

Reproduction Code

No response

Error Logs

No response

Libraries in Use

No response

Operating System

Darwin Kernel Version 24.4.0