zephy-pigweed integration demo app generates incorrect target build output that segfaults

[shaju-mv]

(.venv) shaju@platformgrinder-sp:~/pigweed-zephyr3/zds2023$ west build -p -b native_posix app

[180/180] Linking CXX executable zephyr/zephyr.elf

(.venv) shaju@platformgrinder-sp:~/pigweed-zephyr3/zds2023$ file build/zephyr/zephyr.exe
build/zephyr/zephyr.exe: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, with debug_info, not stripped

(.venv) shaju@platformgrinder-sp:~/pigweed-zephyr3/zds2023$ ./build/zephyr/zephyr.exe
Segmentation fault

(.venv) shaju@platformgrinder-sp:~/pigweed-zephyr3/zds2023$ uname -a
Linux platformgrinder-sp.c.googlers.com 5.19.11-1-amd64 #1 SMP PREEMPT_DYNAMIC Debian 5.19.11-1 (2022-10-31) x86_64 GNU/Linux

[yperess]

You should try it with https://pigweed-review.git.corp.google.com/c/pigweed/pigweed/+/136310 cherry-picked. I believe it might resolve the issue. I think that one of the static threads was not allocated correctly so having the pw_thread backend set up might be the issue. I think this is the case because there was no stack at the time of the segfault.

[aeremin]

FYI, crash is not because of the wrong build output, it's some permissions problem, running with sudo fixes the crash.