Merged. Thanks for picking this up — and for choosing the narrow fix rather than the broad one.

I had suggested except Exception as one option; catching SyntaxError specifically is better, because a config file is executable Python and an error raised by the user's own computation should not be reported as "unable to read the file". test_runtime_errors_are_not_reclassified is exactly the right guard for that boundary, and your three syntax cases cover the subclasses — IndentationError and TabError are both SyntaxError, which is why missing-indentation and mixed-indentation are caught too.

Verified

Reproduced the before/after on a config with a syntax error, dev (dc5c04d) as control:

Both trees leave _config_modules clean on failure and allow a retry after the file is fixed — that falls out of #329 putting the cache assignment after exec_module, and your test_configuration_can_be_retried_after_syntax_fix pins it so a future refactor cannot quietly break it.

Test run on freepdk45, scn4m_subm and sky130: 14 pass / 0 fail on both trees, and the new methods genuinely ran rather than being skipped — Ran 7 tests on dev versus Ran 11 tests here, in 0.021s.

Minor note

The copyright header bump on globals.py (2024 → 2026) is unrelated to the change and now makes that file inconsistent with the rest of the tree, which still says 2016-2024. Harmless, and not worth another round, but a repo-wide bump is better done as its own commit than piecemeal.