Package: libpcre2-8-0
Version: 10.42-1
Severity: serious
Tags: ftbfs
Control: affects -1 src:link-grammar

https://tracker.debian.org/pkg/pcre2
Issues preventing migration:
∙ ∙ autopkgtest for link-grammar/5.11.0~dfsg-1: amd64: Pass, arm64: Regression 
♻ (reference ♻), armel: Regression ♻ (reference ♻), armhf: Regression ♻ 
(reference ♻), i386: Pass, ppc64el: Regression ♻ (reference ♻), s390x: Pass

https://buildd.debian.org/status/logs.php?pkg=link-grammar&ver=5.11.0~dfsg-1%2Bb1

...
make  check-TESTS
make[4]: Entering directory '/<<PKGBUILDDIR>>/tests'
make[5]: Entering directory '/<<PKGBUILDDIR>>/tests'
PASS: mem-leak
PASS: multi-java
../test-driver: line 112: 3264343 Segmentation fault      "$@" >> "$log_file" 
2>&1
FAIL: multi-thread
PASS: multi-dict
PASS: dict-reopen
===============================================
   link-grammar 5.11.0: tests/test-suite.log
===============================================

# TOTAL: 5
# PASS:  4
# SKIP:  0
# XFAIL: 0
# FAIL:  1
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

FAIL: multi-thread
==================

FAIL multi-thread (exit status: 139)

============================================================================
Testsuite summary for link-grammar 5.11.0
============================================================================
# TOTAL: 5
# PASS:  4
# SKIP:  0
# XFAIL: 0
# FAIL:  1
# XPASS: 0
# ERROR: 0
============================================================================
See tests/test-suite.log
Please report to https://github.com/opencog/link-grammar
============================================================================
make[5]: *** [Makefile:806: test-suite.log] Error 1



A backtrace from a coredump of a local build of link-grammar
also suggests that pcre might be the problem:

Core was generated by `/tmp/link-grammar-5.11.0~dfsg/tests/.libs/multi-thread'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f46a39011b1 in ?? () from /lib/x86_64-linux-gnu/libpcre2-8.so.0
[Current thread is 1 (Thread 0x7f469e5546c0 (LWP 17344))]
(gdb) bt
#0  0x00007f46a39011b1 in ?? () from /lib/x86_64-linux-gnu/libpcre2-8.so.0
#1  0x00007f46a38ebb85 in ?? () from /lib/x86_64-linux-gnu/libpcre2-8.so.0
#2  0x00007f46a38fa10f in pcre2_match_8 ()
   from /lib/x86_64-linux-gnu/libpcre2-8.so.0
#3  0x00007f46a3da9a86 in reg_match (rn=0x562bf27ace00, 
    s=0x7f467b5b2100 "Bill") at dict-common/regex-morph.c:219
#4  match_regex (rn=0x562bf27ace00, s=s@entry=0x7f467b5b2100 "Bill")
    at dict-common/regex-morph.c:405
#5  0x00007f46a3ddff63 in regex_guess (gword=0x7f467b59b3b0, 
    word=<optimized out>, dict=0x562bf27a8a00) at tokenize/tokenize.c:413
#6  separate_word (sent=sent@entry=0x7f467b5b59e0, 
    unsplit_word=unsplit_word@entry=0x7f467b59b3b0, 
    opts=opts@entry=0x562bf547ae60) at tokenize/tokenize.c:2709
#7  0x00007f46a3de155a in separate_sentence (sent=sent@entry=0x7f467b5b59e0, 
    opts=opts@entry=0x562bf547ae60) at tokenize/tokenize.c:3116
#8  0x00007f46a3d9b1ec in sentence_split (sent=0x7f467b5b59e0, 
    opts=0x562bf547ae60) at ./link-grammar/api.c:494
#9  0x0000562bf0419670 in parse_one_sent (dict=<optimized out>, 
    opts=0x562bf547ae60, sent_str=<optimized out>)
    at ./tests/multi-thread.cc:34
#10 0x0000562bf04199aa in parse_sents (dict=0x562bf27a8a00, 
    opts=0x562bf547ae60, thread_id=<optimized out>, niter=500)
    at ./tests/multi-thread.cc:119
#11 0x00007f46a3c044a3 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#12 0x00007f46a39b7fd4 in start_thread (arg=<optimized out>)
    at ./nptl/pthread_create.c:442
#13 0x00007f46a3a378d0 in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:100
(gdb) 

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