[MacPorts] #57203: pcreposix segfault in regfree with trivial program

[MacPorts]

#57203: pcreposix segfault in regfree with trivial program
-----------------------+----------------------
  Reporter:  markpizz  |      Owner:  larryv
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  pcre      |
-----------------------+----------------------

Comment (by markpizz):

 Hi Larry,

 My system is running the latest macOS Hight Sierra version 10.13.6.

 Looking in /Library/Logs/DiagnosticReports I do not see any 'crash log'
 specific to this simple application generating a segfault.  The
 /Library/Logs/CrashReporter directory is empty.

 If I run this test program under the debugger I get:
 {{{
 marks-mac-mini:simh mark$ gcc -g -O0 retest.c -I/opt/local/include
 -L/opt/local/lib  -lpthread -lpcreposix -lpcre -o retest
 marks-mac-mini:simh mark$ lldb ./retest
 (lldb) target create "./retest"
 Current executable set to './retest' (x86_64).
 (lldb) run
 Process 20418 launched: './retest' (x86_64)
 Using PCRE V 8.42 2018-03-20
 Regular Expression compile of 'Match This' successful
 Process 20418 stopped
 * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS
 (code=1, address=0x400280)
     frame #0: 0x00007fff714ece95 libsystem_c.dylib`tre_free + 37
 libsystem_c.dylib`tre_free:
 ->  0x7fff714ece95 <+37>: cmpl   $0x0, 0x40(%r14)
     0x7fff714ece9a <+42>: movq   (%r14), %rdi
     0x7fff714ece9d <+45>: je     0x7fff714ecef6            ; <+134>
     0x7fff714ece9f <+47>: xorl   %ebx, %ebx
 Target 0: (retest) stopped.
 (lldb) bt
 * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS
 (code=1, address=0x400280)
   * frame #0: 0x00007fff714ece95 libsystem_c.dylib`tre_free + 37
     frame #1: 0x0000000100000dfd retest`main(argc=1,
 argv=0x00007ffeefbffb48) at retest.c:29
     frame #2: 0x00007fff7142a015 libdyld.dylib`start + 1
     frame #3: 0x00007fff7142a015 libdyld.dylib`start + 1
 (lldb)

 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/57203#comment:2>
MacPorts <https://www.macports.org/>
Ports system for macOS