[mypyc] Raise NameError on undefined names #19395
Merged
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Fixes mypyc/mypyc#879
Changed the type of exception that is raised on undefined names from
RuntimeError
toNameError
.Moved the runtime error that refers to unexpected execution of unreachable code to
shortcircuit_expr
to keep existing behavior and generate the exception in blocks that are unreachable due to short-circuiting.In the future this could probably be optimized to not generate any code at all and just constant-fold the boolean expression.