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Bugfix: Ensure that we take a copy of the sys.modules before iterating over it #1514

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Bugfix: Ensure that we take a copy of the sys.modules before iterating over it #1514

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2 changes: 1 addition & 1 deletion ipykernel/debugger.py
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Original file line number Diff line number Diff line change
Expand Up @@ -693,7 +693,7 @@ async def copyToGlobals(self, message):

async def modules(self, message):
"""Handle a modules message."""
modules = list(sys.modules.values())
modules = list(sys.modules.copy().values())
startModule = message.get("startModule", 0)
moduleCount = message.get("moduleCount", len(modules))
mods = []
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2 changes: 1 addition & 1 deletion ipykernel/ipkernel.py
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Expand Up @@ -120,7 +120,7 @@ def __init__(self, **kwargs):
from .debugger import _is_debugpy_available

self._kernel_modules = [
m.__file__ for m in sys.modules.values() if hasattr(m, "__file__") and m.__file__
m.__file__ for m in sys.modules.copy().values() if hasattr(m, "__file__") and m.__file__
]

# Initialize the Debugger
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