8000 REPL crash when trying to allocate more than sys.maxsize bytes · Issue #1279 · adafruit/circuitpython · GitHub
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REPL crash when trying to allocate more than sys.maxsize bytes #1279

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ddiminnie opened this issue Oct 16, 2018 · 1 comment
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REPL crash when trying to allocate more than sys.maxsize bytes #1279

ddiminnie opened this issue Oct 16, 2018 · 1 comment
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@tannewt
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bug crash
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4.0.0 - Bluetooth

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@ddiminnie
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ddiminnie commented Oct 16, 2018 •
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If (either by sloppy programming [on the user's part] or some other mischance) an instruction requires more than sys.maxsize bytes to execute the REPL crashes. If I had to hazard a guess as to what is causing the problem I would suggest the trouble occurs when trying to compute the number of bytes to report in the MemoryLimit exception. (Note that I have no idea what is actually going on here...)

Here are the simplest steps to reproduce the problem I've managed to come up with in the short time I've messed with this:
>>> ''.join('a' for i in range(1024))
>>> _*2**29
@tannewt tannewt added this to the 4.0.0 - Bluetooth milestone Oct 17, 2018
@ddiminnie
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If anyone wants a one-liner (instead of the example above) to reproduce this, the following will also work:
('a'*256)*2**29

@tannewt tannewt self-assigned this Feb 4, 2019
@tannewt tannewt mentioned this issue Feb 4, 2019
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tannewt added a commit that referenced this issue Feb 5, 2019
@tannewt
Check sequence multiply for length overflow
c60f77d 
Fixes #1279
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