[New-bugs-announce] [issue38739] pyperformance html5lib cannot import Mapping (and fails)

[Travis Lazar]

New submission from Travis Lazar <travis.lazar at gmail.com>:

When running pyperformance html5lib test, the application crashes with "ImportError: cannot import name 'Mapping' from 'collections' (/py3buildpath/lib/python3.9/collections/__init__.py)"

To reproduce:

1 - Build Python from source. I produced with git commit befa032d8869e0fab4732d910f3887642879d644 from cpython GitHub.

2 - Run pyperformance with: /py3buildpath/bin/pyperformance run --python=/py3buildpath/bin/python3 --venv venvpath -b html5lib -o output.json

3 - Immediate crash is seen with message:

#!/bin/sh
  File "/usr/local/src/pyperf-tot-no-venv/lib/python3.9/site-packages/html5lib/_tokenizer.py", line 16, in <module>
    from ._trie import Trie
  File "/usr/local/src/pyperf-tot-no-venv/lib/python3.9/site-packages/html5lib/_trie/__init__.py", line 3, in <module>
    from .py import Trie as PyTrie
  File "/usr/local/src/pyperf-tot-no-venv/lib/python3.9/site-packages/html5lib/_trie/py.py", line 6, in <module>
    from ._base import Trie as ABCTrie
  File "/usr/local/src/pyperf-tot-no-venv/lib/python3.9/site-packages/html5lib/_trie/_base.py", line 3, in <module>
    from collections import Mapping
ImportError: cannot import name 'Mapping' from 'collections' (/root/py3-tot-no/lib/python3.9/collections/__init__.py)
ERROR: Benchmark html5lib failed: Benchmark died
Traceback (most recent call last):
  File "/usr/local/src/pyperf-tot-no-venv/lib/python3.9/site-packages/pyperformance/run.py", line 132, in run_benchmarks
    bench = func(cmd_prefix, options)
  File "/usr/local/src/pyperf-tot-no-venv/lib/python3.9/site-packages/pyperformance/benchmarks/__init__.py", line 244, in BM_html5lib
    return run_perf_script(python, options, "html5lib")
  File "/usr/local/src/pyperf-tot-no-venv/lib/python3.9/site-packages/pyperformance/run.py", line 98, in run_perf_script
    run_command(cmd, hide_stderr=not options.verbose)
  File "/usr/local/src/pyperf-tot-no-venv/lib/python3.9/site-packages/pyperformance/run.py", line 66, in run_command
    raise RuntimeError("Benchmark died")
RuntimeError: Benchmark died

----------
components: Tests
messages: 356219
nosy: Travis Lazar
priority: normal
severity: normal
status: open
title: pyperformance html5lib cannot import Mapping (and fails)
type: crash
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38739>
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