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The register unload area for Arm thumb 1 processor cores (Cortex M0/M0+/M1/M23) was undersized by 8 bytes causing stack corruption.

Resolves #10355.

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@dhalbert dhalbert left a comment

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CI did not build enough things, but I tested locally. RP2040 working again. Thanks!

@dhalbert dhalbert merged commit 3c3ae87 into adafruit:main May 17, 2025
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Hard fault: memory access or instruction error rp2040 on 10.0.0-alpha.5
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