[Tracking] Failures found with testing on real hardware for release

[maribu]

During testing the release branch 2025.10-branch with compile_and_test_for_board.py using the native Alpine edge toolchain (GCC 15.2.0) for a select set of boards I ran in the following failures:

Note

Reports are uploaded here: https://github.com/maribu/riot-test-results/tree/main/2025.10-5bedbbc44b47767ed66ac955daf977d1a56b5d33

• nrf52840dk
  • Failures during compilation:
    • tests/periph/selftest_shield
      • Fix in: tests/periph/selftest_shield: Add NONSTRING attribute to test data #21884
    • tests/pkg/arduino_sdi_12
      • Fixed by pkg: Always add mandatory GITAMFLAGS [backport 2025.10] #21879
  • Failures during test:
    • tests/net/gnrc_ipv6_fwd_w_sub
    • tests/pkg/cn-cbor
      • Fixed in pkg/cn-cbor: fix unaligned access #21880
    • tests/sys/crypto
• same54-xpro
  • Failures during test:
    • tests/drivers/mtd_raw
      • Preliminary assessment: SD card not inserted, would pass with SD card
    • tests/periph/rtc
    • tests/periph/rtt
    • tests/pkg/cn-cbor
      • Fixed in pkg/cn-cbor: fix unaligned access #21880
    • tests/pkg/edhoc_c
    • tests/sys/evtimer_underflow
    • tests/sys/posix_sleep
• arduino-mega2560
  • Failures during compilation:
    • tests/bench/msg_pingpong
      • Fix in: core/lib/atomic_c11: Add __atomic_test_and_set() #21883
    • tests/periph/selftest_shield
      • Fix in: tests/periph/selftest_shield: Add NONSTRING attribute to test data #21884
    • tests/pkg/arduino_sdi_12
      • Fixed by pkg: Always add mandatory GITAMFLAGS [backport 2025.10] #21879
    • tests/pkg/micro-ecc
      • Fixed by pkg/micro-ecc: fix on GCC 15.2.0 for AVR #21920
  • Failures during test:
    • tests/bench/runtime_coreapis
      • Fix in: tests/bench/runtime_coreapis: fix test on 8 bit system #21885
    • tests/core/msg_queue_print
      • Fix in: tests/core/msg_queue_print: fully initialize msg for sending #21886
    • tests/core/thread_flags_group
      • Fix in: core/thread_flags_group: use portable implementation #21895
    • tests/pkg/littlefs2
    • tests/pkg/mbedtls
    • tests/pkg/minmea
    • tests/sys/congure_quic
    • tests/sys/congure_test
    • tests/sys/malloc_monitor
    • tests/sys/pbkdf2
    • tests/sys/phydat_unix
    • tests/sys/shell
    • tests/sys/ztimer_overhead

[crasbe]

This is probably a superset of #19469, so can we close #19469?

[crasbe]

Is this bug still occurring: #13408?