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valgrind output added by Kooda on Wed Nov 13 12:27:15 2019
steven:~/bug$ valgrind ./bug ==13847== Memcheck, a memory error detector ==13847== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==13847== Using Valgrind-3.15.0 and LibVEX; rerun with -h for copyright info ==13847== Command: ./bug ==13847== ==13847== Invalid read of size 4 ==13847== at 0x4FBA970: really_mark (in /home/kooda/coop/5.1.0-bug/lib/libchicken.so.11) ==13847== Address 0xce5e4fac is not stack'd, malloc'd or (recently) free'd ==13847== ==13847== Invalid read of size 4 ==13847== at 0x4FBAB70: really_remark (in /home/kooda/coop/5.1.0-bug/lib/libchicken.so.11) ==13847== Address 0xce5e4fac is not stack'd, malloc'd or (recently) free'd ==13847== [panic] unrecoverable segmentation violation - execution terminated bug.scm:3: srfi-4#u32vector bug.scm:5: srfi-4#make-u32vector bug.scm:9: chicken.locative#make-locative bug.scm:10: chicken.locative#make-locative bug.scm:9: chicken.locative#make-locative bug.scm:10: chicken.locative#make-locative bug.scm:9: chicken.locative#make-locative bug.scm:10: chicken.locative#make-locative bug.scm:9: chicken.locative#make-locative bug.scm:10: chicken.locative#make-locative bug.scm:9: chicken.locative#make-locative bug.scm:10: chicken.locative#make-locative bug.scm:15: chicken.gc#gc <-- ==13847== ==13847== HEAP SUMMARY: ==13847== in use at exit: 756,174 bytes in 2,728 blocks ==13847== total heap usage: 2,729 allocs, 1 frees, 756,198 bytes allocated ==13847== ==13847== LEAK SUMMARY: ==13847== definitely lost: 4,096 bytes in 1 blocks ==13847== indirectly lost: 0 bytes in 0 blocks ==13847== possibly lost: 0 bytes in 0 blocks ==13847== still reachable: 752,078 bytes in 2,727 blocks ==13847== suppressed: 0 bytes in 0 blocks ==13847== Rerun with --leak-check=full to see details of leaked memory ==13847== ==13847== For lists of detected and suppressed errors, rerun with: -s ==13847== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)