8000 Taking slice of memoryview in Viper function crashes PyBoard · Issue #6523 · micropython/micropython · GitHub
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Taking slice of memoryview in Viper function crashes PyBoard #6523

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twisteroidambassador opened this issue Oct 7, 2020 · 1 comment
Open

Taking slice of memoryview in Viper function crashes PyBoard #6523

twisteroidambassador opened this issue Oct 7, 2020 · 1 comment
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bug py-core Relates to py/ directory in source

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@twisteroidambassador
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On a PyBoard v1.1 with firmware 1.13, put the following code into a file:

import micropython


@micropython.viper
def take_memoryview_slice():
    ba = bytearray(10)
    mv = memoryview(ba)
    slice = mv[0:1]

Running take_memoryview_slice() resets the PyBoard.
@dpgeorge dpgeorge added the py-core Relates to py/ directory in source label Oct 7, 2020
@dpgeorge
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dpgeorge commented Oct 7, 2020

Thanks for the report, I can confirm the issue (on the unix port).

The problem is that the native emitter in viper mode cannot handle slices with literal integer arguments. To work around it you can use:

import micropython
from micropython import const

@micropython.viper
def take_memoryview_slice():
    ba = bytearray(10)
    mv = memoryview(ba)
    slice = mv[const(0):const(1)]

tannewt pushed a commit to tannewt/circuitpython that referenced this issue Jul 1, 2022
@jepler
Always release displays during deep sleep
ed326c4 
Closes micropython#6523
tannewt pushed a commit to tannewt/circuitpython that referenced this issue Jul 11, 2022
@jepler @dhalbert
Always release displays during deep sleep
a1fa1ad 
Closes micropython#6523
@jonnor jonnor added the bug label Sep 13, 2024
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