I was able to replicate the crash with valgrind: ==419028== Memcheck, a memory error detector ==419028== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al. ==419028== Using Valgrind-3.19.0 and LibVEX; rerun with -h for copyright info ==419028== Command: ../../obj/src/dawgdic-find ==419028== ==419028== Invalid read of size 4 ==419028== at 0x10AA4D: offset (dictionary-unit.h:60) ==419028== by 0x10AA4D: Follow (dictionary.h:129) ==419028== by 0x10AA4D: FindPrefixKeys (dawgdic-find.cc:109) ==419028== by 0x10AA4D: main (dawgdic-find.cc:208) ==419028== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==419028== ==419028== ==419028== Process terminating with default action of signal 11 (SIGSEGV) ==419028== Access not within mapped region at address 0x0 ==419028== at 0x10AA4D: offset (dictionary-unit.h:60) ==419028== by 0x10AA4D: Follow (dictionary.h:129) ==419028== by 0x10AA4D: FindPrefixKeys (dawgdic-find.cc:109) ==419028== by 0x10AA4D: main (dawgdic-find.cc:208) ==419028== If you believe this happened as a result of a stack ==419028== overflow in your program's main thread (unlikely but ==419028== possible), you can try to increase the size of the ==419028== main thread stack using the --main-stacksize= flag. ==419028== The main thread stack size used in this run was 8388608. ==419028== ==419028== HEAP SUMMARY: ==419028== in use at exit: 77,855 bytes in 4 blocks ==419028== total heap usage: 4 allocs, 0 frees, 77,855 bytes allocated ==419028== ==419028== LEAK SUMMARY: ==419028== definitely lost: 0 bytes in 0 blocks ==419028== indirectly lost: 0 bytes in 0 blocks ==419028== possibly lost: 0 bytes in 0 blocks ==419028== still reachable: 77,855 bytes in 4 blocks ==419028== suppressed: 0 bytes in 0 blocks ==419028== Rerun with --leak-check=full to see details of leaked memory ==419028== ==419028== For lists of detected and suppressed errors, rerun with: -s ==419028== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0) ./crash.sh: line 20: 419028 Segmentation fault (core dumped) env -i MALLOC_CHECK_=0 $GDB ../../obj/src/dawgdic-find < "$DIR/file___dev__stdin.symb"
No idea how to fix it, but at least it give an idea where the crash happen with version 0.4.5-3. -- Happy hacking Petter Reinholdtsen
