Issues

• About 80 of 209 probe doc citations point at the wrong line: the line number is the wrong anchor

  PyMCU/pymcu-avr#33 · Filter by author begeistert opened on Sep 26, 2026

• A 16-bit register store emits the low byte before the high byte: OCR1A.value = 0x1234 latches the stale TEMP byte as the high half

  bug
  PyMCU/pymcu-avr#31 · Filter by author begeistert opened on Sep 18, 2026

• Editable install fails when the packaged backend links to build/bin

  bug
  PyMCU/pymcu-avr#30 · Filter by author begeistert opened on Sep 16, 2026

• The FunctionRef reachability scan lists five instruction kinds, so a function pointer reaching the firmware any other way can be dead-code eliminated

  bug
  PyMCU/pymcu-avr#29 · Filter by author begeistert opened on Sep 15, 2026

• @used produces no symbol in the firmware: the decorator is accepted, reaches the IR, and is dropped by the backend

  bug
  PyMCU/pymcu-avr#28 · Filter by author begeistert opened on Sep 15, 2026

• uint16 * const widened to uint32 always calls the full 32x32 __mul32 (102 bytes); avr-gcc uses a 16x16->32 multiply (30 bytes) for the same expression

  enhancement
  PyMCU/pymcu-avr#26 · Filter by author begeistert opened on Sep 15, 2026

• Y reaches only the lowest 64 bytes of static SRAM, so library routines pay 4-byte LDS/STS for every local

  enhancement
  PyMCU/pymcu-avr#25 · Filter by author begeistert opened on Sep 15, 2026

• The integration suite reports 2494/2494 and runs 2494 of 2499, with two skips that are not deliberate

  bug
  PyMCU/pymcu-avr#21 · Filter by author begeistert opened on Sep 10, 2026
  1

• toolchain-smoke is green while skipping every test of the toolchain pipeline: 6 of 139 run

  PyMCU/pymcu-avr#20 · Filter by author begeistert opened on Sep 8, 2026

• Three surviving mutants outside the comparison code, and only one of them is a coverage gap

  PyMCU/pymcu-avr#18 · Filter by author begeistert opened on Aug 31, 2026

• Integer comparison: three surviving mutants in the LessOrEqual clamp, and a fixture whose comment names a path it does not take

  PyMCU/pymcu-avr#17 · Filter by author begeistert opened on Aug 31, 2026

• The interrupt vector table is emitted with 26 slots on every part, including the ten-vector ATtinys

  PyMCU/pymcu-avr#16 · Filter by author begeistert opened on Aug 31, 2026

• Seven codegen regions are never executed by the unit suite, and one of them shipped wrongcode

  PyMCU/pymcu-avr#15 · Filter by author begeistert opened on Aug 31, 2026

• asyncio has no timebase on the ATtiny parts

  PyMCU/pymcu-avr#4 · Filter by author begeistert opened on Aug 19, 2026