gcc/testsuite/gfortran.dg/realloc_on_assign_25.f90

   1 ! { dg-do run }
   2 ! PR 47674 - this would segfault if MALLOC_PERTURB is set.
   3 ! This checks a code path where it is not possible to determine
   4 ! the length of the string at compile time.
   5 !
   6 program main
   7   implicit none
   8   character(:), allocatable :: a
   9   integer :: m, n
  10   a = 'a'
  11   if (a .ne. 'a') STOP 1
  12   a = a // 'x'
  13   if (a .ne. 'ax') STOP 2
  14   if (len (a) .ne. 2) STOP 3
  15   n = 2
  16   m = 2
  17   a = a(m:n)
  18   if (a .ne. 'x') STOP 4
  19   if (len (a) .ne. 1) STOP 5
  20 end program main