Hard fault due to invalid stack pointer

embedded
3

Thanks @nerditation ,

Yes, must be an oversized future. Sounds like a probable hypothesis. But...

  1. How can I track this down? Does it make sense to look into the ELF file? See update below.
  2. This is a hard fault in safe code... Isn't Rust supposed to catch that kind of error? Nope - not for stack overflows.

UPDATE: Confirmed - As stack allocations in the pre-amble always follow the same pattern it's easy to see which function allocates what. By looking at the SP offsets I can estimate variable/future size. That works.