BlackMark a54075e526 test: the device runner refuses an image that runs past flash end ...

A boot-linked image larger than its slot cannot execute on hardware, and
the naive copy smashed the heap beyond avr->flash — after which the
simulation misbehaved in ways that pointed everywhere but at the size:
phantom byte losses on the UART, garbage in SPMCSR, all downstream of
the overrun. The size gate had said it plainly; now the runner does too.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-07-27 18:57:13 +02:00

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