Henry Chen <[email protected]> added the comment:
An attempt to clarify the issue in my own mind:
def foo():
# import pdb; pdb.set_trace()
exec('pass', {}, FakeContainer())
This function runs successfully. But if you uncomment the pdb line and then
step thru in the pdb console, there is an Exception.
I *think* the underlying principle is that code that runs normally should also
run under pdb, which this example violates. However, to adhere to the principle
100% could be a very steep technical cost.
Alternatively, I'd argue that the function should NOT run even without pdb,
since exec requires a (complete) mapping type according to the documentation.
Perhaps the thing to do is to add more stringent type checking to exec and eval?
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<https://bugs.python.org/issue34782>
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