enhancementhelp wanted
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Was surprised bugbear didn't report this, but not encountered in live code so I don't know if it's seen much / ever in the wild:
try:
...
except BaseException:
...
except:
...
will report B001/E722, but in a project that uses bare excepts widely and disables those checks the except never being possible to run seems like a separate error.
try:
...
except BaseException:
...
except Exception:
...
Gives no warning, nor does a plausibly more common
try:
...
except Exception:
...
except ValueError:
...
or similar variants. Checking whether a caught exception is a built-in, and if so issubclass of a previously caught exception, seems straightforward. I quickly checked mypy and vulture as well and neither of them sees it. But this might definitely not be common enough that it's worth bothering with.