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diff --git a/gcc/testsuite/gfortran.dg/char_allocation_1.f90 b/gcc/testsuite/gfortran.dg/char_allocation_1.f90
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+! PR fortran/31974
+! { dg-do run }
+ subroutine foo (n)
+ integer :: n
+ character (len = n) :: v(n)
+ v = ''
+ if (any (v /= '')) call abort
+ end subroutine foo
+
+ call foo(7)
+ end