hallowing does not boot with build 7c443fb.

[jerryneedell]

I tried adafruit-circuitpython-hallowing_m0_express-en_US-20190131-7c443fb.uf2 and the Hallowing does not boot

dmesg reports

163403.942122] FAT-fs (sdc): unable to read boot sector to mark fs as dirty

adafruit-circuitpython-hallowing_m0_express-en_US-20190131-63d4561.uf2 boots fine.

[jerryneedell]

latest build also does not boot ;
https://adafruit-circuit-python.s3.amazonaws.com/bin/hallowing_m0_express/en_US/adafruit-circuitpython-hallowing_m0_express-en_US-20190201-7d039a5.uf2

same dmesg report
i

[tannewt]

I think I've fixed this in #1513

[jerryneedell]

yes you did

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Adafruit CircuitPython 4.0.0-beta.1-38-g845783a45 on 2019-02-01; HalloWing M0 Express with samd21g18
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