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Re: set isearch-terminators "\r" in .inputrc causes malloc assert fails/


From: Eduardo A . Bustamante López
Subject: Re: set isearch-terminators "\r" in .inputrc causes malloc assert fails/death
Date: Thu, 5 May 2016 06:48:31 -0500
User-agent: Mutt/1.5.23 (2014-03-12)

On Thu, May 05, 2016 at 10:30:04AM +0200, Piotr Grzybowski wrote:
> hi,
> 
>  I cannot replicate it in anyway on mac os x or linux.
>  Could you please define "sometimes", and supply the exact version of bash 
> that shows this behavior, and the version you refer to as "my old bash"? I 
> have a distinct feeling that it is something different than my old bash.
> 
> cheers,
> pg
> 

I'm able to replicate with the master branch.

|  address@hidden ...src/gnu/bash % INPUTRC=/dev/fd/3 gdb --batch ./bash -ex r 
3<<<'set isearch-terminators "\r"'
|  address@hidden:~/local/src/gnu/bash$ ls
|  
|  malloc: unknown:0: assertion botched
|  malloc: block on free list clobbered
|  last command: ls
|  Aborting...
|  Program received signal SIGABRT, Aborted.
|  0x00007ffff763a107 in __GI_raise (address@hidden) at 
../nptl/sysdeps/unix/sysv/linux/raise.c:56
|  56      ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
|  
|  
|  Program received signal SIGABRT, Aborted.
|  0x00007ffff763a107 in __GI_raise (address@hidden) at 
../nptl/sysdeps/unix/sysv/linux/raise.c:56
|  56      ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
|  (gdb) bt
|  #0  0x00007ffff763a107 in __GI_raise (address@hidden) at 
../nptl/sysdeps/unix/sysv/linux/raise.c:56
|  #1  0x00007ffff763b4e8 in __GI_abort () at abort.c:89
|  #2  0x0000000000447470 in programming_error (format=0x4f9bf0 "malloc: block 
on free list clobbered") at error.c:176
|  #3  0x00000000004d8bc2 in xbotch (mem=0x8a2e08, e=0, s=0x4f9bf0 "malloc: 
block on free list clobbered", file=0x4dcd68 "make_cmd.c", line=100) at 
malloc.c:319
|  #4  0x00000000004d9516 in internal_malloc (n=3, file=0x4dcd68 "make_cmd.c", 
line=100, flags=1) at malloc.c:801
|  #5  0x00000000004d9ee2 in sh_malloc (bytes=3, file=0x4dcd68 "make_cmd.c", 
line=100) at malloc.c:1187
|  #6  0x00000000004882e6 in sh_xmalloc (bytes=3, file=0x4dcd68 "make_cmd.c", 
line=100) at xmalloc.c:183
|  #7  0x000000000042fd5a in make_bare_word (string=0x72b0a8 "ls") at 
make_cmd.c:100
|  #8  0x00000000004464b7 in copy_word (w=0x731d28) at copy_cmd.c:61
|  #9  0x00000000004464f5 in copy_word_list (list=0x731788) at copy_cmd.c:75
|  #10 0x000000000046543e in expand_word_list_internal (list=0x731788, 
eflags=31) at subst.c:9656
|  #11 0x0000000000464a5e in expand_words (list=0x731788) at subst.c:9280
|  #12 0x000000000043b3cc in execute_simple_command (simple_command=0x733a88, 
pipe_in=-1, pipe_out=-1, async=0, fds_to_close=0x731d08) at execute_cmd.c:4000
|  #13 0x0000000000435829 in execute_command_internal (command=0x733a48, 
asynchronous=0, pipe_in=-1, pipe_out=-1, fds_to_close=0x731d08) at 
execute_cmd.c:787
|  #14 0x0000000000434e8a in execute_command (command=0x733a48) at 
execute_cmd.c:390
|  #15 0x0000000000420d00 in reader_loop () at eval.c:160
|  #16 0x000000000041eb21 in main (argc=1, argv=0x7fffffffe528, 
env=0x7fffffffe538) at shell.c:756
|  
|  address@hidden ...src/gnu/bash % INPUTRC=/dev/fd/3 gdb --batch ./bash -ex 'b 
' -ex r  3<<<'set isearch-terminators "\n"'
|  No default breakpoint address now.
|  address@hidden:~/local/src/gnu/bash$ ls
|  
|  malloc: make_cmd.c:100: assertion botched
|  malloc: block on free list clobbered
|  last command: ls
|  Aborting...
|  Program received signal SIGABRT, Aborted.
|  0x00007ffff763a107 in __GI_raise (address@hidden) at 
../nptl/sysdeps/unix/sysv/linux/raise.c:56
|  56      ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
|  address@hidden ...src/gnu/bash % INPUTRC=/dev/fd/3 gdb --batch ./bash -ex 'b 
' -ex r  3<<<'set isearch-terminators "a"' 
|  No default breakpoint address now.
|  address@hidden:~/local/src/gnu/bash$ ls
|  
|  malloc: /usr/src/local/bash/bash-4.3-patched/parse.y:6226: assertion botched
|  malloc: block on free list clobbered
|  last command: ls
|  Aborting...
|  Program received signal SIGABRT, Aborted.
|  0x00007ffff763a107 in __GI_raise (address@hidden) at 
../nptl/sysdeps/unix/sysv/linux/raise.c:56
|  56      ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
|  address@hidden ...src/gnu/bash % INPUTRC=/dev/fd/3 gdb --batch ./bash -ex 'b 
' -ex r  3<<<'set isearch-terminators "123"'
|  No default breakpoint address now.
|  address@hidden:~/local/src/gnu/bash$ ls
|  
|  malloc: make_cmd.c:100: assertion botched
|  malloc: block on free list clobbered
|  last command: ls
|  Aborting...
|  Program received signal SIGABRT, Aborted.
|  0x00007ffff763a107 in __GI_raise (address@hidden) at 
../nptl/sysdeps/unix/sysv/linux/raise.c:56
|  56      ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.

Forgive the extraneus -ex 'b ' on gdb, I'm lazy and I left it :-D

I can't reproduce it in devel.

-- 
Eduardo Bustamante
https://dualbus.me/



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