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SIGCHLD を受け取った後、job_chksave で ksh セグフォールトが発生する

Solution In Progress - Updated -

Issue

  • コードの以下の部分で、ksh がクラッシュします。
(gdb) bt
#0  job_chksave (pid=5066) at /usr/src/debug/ksh-20120801/src/cmd/ksh93/sh/jobs.c:1949
#1  0x0000000000429240 in job_reap (sig=17) at /usr/src/debug/ksh-20120801/src/cmd/ksh93/sh/jobs.c:428
#2  <signal handler called>
#3  job_subsave () at /usr/src/debug/ksh-20120801/src/cmd/ksh93/sh/jobs.c:1990
#4  0x00000000004533f6 in sh_subshell (shp=0x76cba0, t=0x7fd6050c9fe0, flags=4, comsub=3) at /usr/src/debug/ksh-20120801/src/cmd/ksh93/sh/subshell.c:520
...

Environment

  • Red Hat Enterprise Linux (RHEL) 6.5
  • ksh-20120801-10.el6_5.5

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