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diff --git a/gcc/testsuite/gfortran.dg/null_4.f90 b/gcc/testsuite/gfortran.dg/null_4.f90
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+! { dg-do run }
+!
+! PR fortran/42936
+!
+! Contributed by Mat Cross
+!
+PROGRAM PASSES_NULL
+ CALL SUB(NULL())
+CONTAINS
+ SUBROUTINE SUB(I)
+ INTEGER, POINTER :: I(:,:,:)
+ IF (ASSOCIATED (I)) CALL ABORT ()
+ END SUBROUTINE SUB
+END PROGRAM PASSES_NULL