ubu...@ubuntu:~/ast$ gdb `which ksh` core
GNU gdb (GDB) 7.2-ubuntu
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Reading symbols from /bin/ksh...done.
warning: exec file is newer than core file.
[New Thread 17169]
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols
found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Core was generated by `ksh -i'.
Program terminated with signal 11, Segmentation fault.
#0 0x00000000004dee53 in parse (env=0x0, rex=0x77d960, cont=0x77d960, s=0x1
<Address 0x1 out of bounds>)
at /home/ubuntu/ast/src/lib/libast/regex/regnexec.c:976
976 switch (follow(env, rex, cont,
s))
(gdb) where
#0 0x00000000004dee53 in parse (env=0x0, rex=0x77d960, cont=0x77d960, s=0x1
<Address 0x1 out of bounds>)
at /home/ubuntu/ast/src/lib/libast/regex/regnexec.c:976
#1 0x000000000042678f in fcmbstate (state=0x1705de0 "\216\004", s=0xb93639a0,
len=0x77e560)
at /home/ubuntu/ast/src/cmd/ksh93/sh/fcin.c:198
#2 0x000000000045d4b3 in arith_exec (ep=0x16ee680) at
/home/ubuntu/ast/src/cmd/ksh93/sh/streval.c:252
#3 0x000000000045dac7 in arith_exec (ep=0x0) at
/home/ubuntu/ast/src/cmd/ksh93/sh/streval.c:325
#4 0x000000000045dbff in arith_exec (ep=0x77d960) at
/home/ubuntu/ast/src/cmd/ksh93/sh/streval.c:327
#5 0x0000000000461742 in sh_subshell (t=0x4, flags=16, comsub=0)
at /home/ubuntu/ast/src/cmd/ksh93/sh/subshell.c:597
#6 0x0000000000461d31 in sh_subshell (t=0x400408418, flags=0, comsub=24045144)
at /home/ubuntu/ast/src/cmd/ksh93/sh/subshell.c:684
#7 0x000000000045c6f1 in sh_fmtqf (string=0x0, single=4, fold=0)
at /home/ubuntu/ast/src/cmd/ksh93/sh/string.c:574
#8 0x0000000000461742 in sh_subshell (t=0x4, flags=16, comsub=1)
at /home/ubuntu/ast/src/cmd/ksh93/sh/subshell.c:597
#9 0x0000000000461d31 in sh_subshell (t=0x4016f5ef0, flags=0, comsub=24044992)
at /home/ubuntu/ast/src/cmd/ksh93/sh/subshell.c:684
#10 0x000000000045c6f1 in sh_fmtqf (string=0x0, single=4, fold=0)
at /home/ubuntu/ast/src/cmd/ksh93/sh/string.c:574
#11 0x0000000000407dca in ?? ()
#12 0x0000003100000000 in ?? ()
#13 0x000000000077e560 in _ast_conf_data ()
#14 0x000000000077cde0 in _ast_conf_data ()
#15 0x000000000077e560 in _ast_conf_data ()
#16 0x000000000077e560 in _ast_conf_data ()
#17 0x42f07029a1943312 in ?? ()
#18 0x0000000000000000 in ?? ()
(gdb)
--
ksh93 crashed with SIGSEGV
https://bugs.launchpad.net/bugs/638867
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