re PR fortran/62142 (internal compiler error: Segmentation fault (X = X - L*floor(X/L)))

2014-08-15  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/62142
	* trans-expr.c (is_runtime_conformable):  Add NULL pointer checks.

2014-08-15  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/62142
	* gfortran.dg/realloc_on_assign_24.f90:  New test.

From-SVN: r214043

gcc/fortran/ChangeLog

+2014-08-15  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	PR fortran/62142
+	* trans-expr.c (is_runtime_conformable):  Add NULL pointer checks.
+
 2014-08-15  Tobias Burnus  <burnus@net-b.de>
 
 	* resolve.c (resolve_critical): Fix name mangling.

gcc/fortran/trans-expr.c

@@ -7897,7 +7897,7 @@ is_runtime_conformable (gfc_expr *expr1, gfc_expr *expr2)
 	  for (a = expr2->value.function.actual; a != NULL; a = a->next)
 	    {
 	      e1 = a->expr;
-	      if (e1->rank > 0 && !is_runtime_conformable (expr1, e1))
+	      if (e1 && e1->rank > 0 && !is_runtime_conformable (expr1, e1))
 		return false;
 	    }
 	  return true;
@@ -7908,7 +7908,7 @@ is_runtime_conformable (gfc_expr *expr1, gfc_expr *expr2)
 	  for (a = expr2->value.function.actual; a != NULL; a = a->next)
 	    {
 	      e1 = a->expr;
-	      if (e1->rank > 0 && !is_runtime_conformable (expr1, e1))
+	      if (e1 && e1->rank > 0 && !is_runtime_conformable (expr1, e1))
 		return false;
 	    }
 	  return true;

gcc/testsuite/ChangeLog

+2014-08-15  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	PR fortran/62142
+	* gfortran.dg/realloc_on_assign_24.f90:  New test.
+
 2014-08-15  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/62072

gcc/testsuite/gfortran.dg/realloc_on_assign_24.f90

+! { dg-do compile }
+! PR 62142 - this used to segfault
+! Original test case by Ondřej Čertík .
+program test_segfault
+  implicit none
+  real, allocatable :: X(:)
+  allocate (x(1))
+  x = 1.
+  X = floor(X)
+end program