tests/triple-backref

   1 #! /bin/sh
   2 # Test for a bug in glibc's regex code as of September 7, 2014.
   3 #
   4 # Copyright (C) 2014-2025 Free Software Foundation, Inc.
   5 #
   6 # Copying and distribution of this file, with or without modification,
   7 # are permitted in any medium without royalty provided the copyright
   8 # notice and this notice are preserved.
   9
  10 # This tickles a bug in the regex code that can cause heap violations etc.
  11 # A fix would be welcome, though fixing is not trivial.  See:
  12 # https://sourceware.org/bugzilla/show_bug.cgi?id=11053
  13
  14 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  15 require_timeout_
  16
  17 echo a > in || framework_failure_
  18
  19 fail=0
  20
  21 # Clear this, so glibc doesn't bother to produce a core dump.
  22 MALLOC_CHECK_=
  23
  24 warn_ "$ME_: expect malfunction on glibc systems due to" \
  25    "https://sourceware.org/bugzilla/show_bug.cgi?id=11053"
  26
  27 # While with glibc-2.35, it no longer aborts, the empty result is still wrong:
  28 timeout 10 grep -E '(.?)(.?)(.?)\3\2\1' in > out || fail=1
  29 compare out in || fail=1
  30
  31 Exit $fail