re PR fortran/40246 (ICE on invalid SOURCE= using NULLIFY)

2009-05-26  Tobias Burnus  <burnus@net-b.de>

        PR fortran/40246
        * match.c (gfc_match_nullify): NULLify freed pointer.

2009-05-26  Tobias Burnus  <burnus@net-b.de>

        PR fortran/40246
        * gfortran.dg/nullify_4.f90: New test.

From-SVN: r147879

gcc/fortran/ChangeLog

+2009-05-26  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/40246
+	* match.c (gfc_match_nullify): NULLify freed pointer.
+
 2009-05-26  Ian Lance Taylor  <iant@google.com>
 
 	* Make-lang.in (gfortranspec.o): Use $(COMPILER).

gcc/fortran/match.c

@@ -2418,6 +2418,11 @@ syntax:
 
 cleanup:
   gfc_free_statements (new_st.next);
+  new_st.next = NULL;
+  gfc_free_expr (new_st.expr1);
+  new_st.expr1 = NULL;
+  gfc_free_expr (new_st.expr2);
+  new_st.expr2 = NULL;
   return MATCH_ERROR;
 }
 

gcc/testsuite/ChangeLog

+2009-05-26  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/40246
+	* gfortran.dg/nullify_4.f90: New test.
+
 2009-05-26  Richard Guenther  <rguenther@suse.de>
 
 	* gcc.dg/tree-ssa/inline-3.c: Remove dump file.

gcc/testsuite/gfortran.dg/nullify_4.f90

+! { dg-do compile }
+! PR fortran/40246
+!
+! Check error recovery; was crashing before.
+!
+real, pointer :: ptr
+nullify(ptr, mesh%coarser) ! { dg-error "Syntax error in NULLIFY statement" }
+end