From: Steven G. Kargl <kargl@gcc.gnu.org>
Date: Wed, 7 Feb 2018 22:41:59 +0000 (+0000)
Subject: re PR fortran/82994 (ICE in gfc_match_deallocate, at fortran/match.c:4478)
X-Git-Tag: releases/gcc-6.5.0~539
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b957ec24e4566f84b17618216a54bab571fba33f;p=thirdparty%2Fgcc.git

re PR fortran/82994 (ICE in gfc_match_deallocate, at fortran/match.c:4478)

2018-02-07  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/82994
	* match.c (gfc_match_deallocate): Check for NULL pointer.

2018-02-07  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/82994
	* gfortran.dg/deallocate_error_3.f90: New test.
	* gfortran.dg/deallocate_error_4.f90: New test.

From-SVN: r257468
---

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 00caf4add6ed..c3a2b628d8ab 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,8 @@
+2018-02-07  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/82994
+	* match.c (gfc_match_deallocate): Check for NULL pointer.
+
 2018-02-07  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/82049
diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index d3ea16735543..516abc5ba80e 100644
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -4275,8 +4275,8 @@ gfc_match_deallocate (void)
 	   && (tail->expr->ref->type == REF_COMPONENT
 	       || tail->expr->ref->type == REF_ARRAY));
       if (sym && sym->ts.type == BT_CLASS)
-	b2 = !(CLASS_DATA (sym)->attr.allocatable
-	       || CLASS_DATA (sym)->attr.class_pointer);
+	b2 = !(CLASS_DATA (sym) && (CLASS_DATA (sym)->attr.allocatable
+	       || CLASS_DATA (sym)->attr.class_pointer));
       else
 	b2 = sym && !(sym->attr.allocatable || sym->attr.pointer
 		      || sym->attr.proc_pointer);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4e8db9407c9a..09a8056109cf 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2018-02-07  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/82994
+	* gfortran.dg/deallocate_error_3.f90: New test.
+	* gfortran.dg/deallocate_error_4.f90: New test.
+
 2018-02-07  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/82049
diff --git a/gcc/testsuite/gfortran.dg/deallocate_error_3.f90 b/gcc/testsuite/gfortran.dg/deallocate_error_3.f90
new file mode 100644
index 000000000000..149b7c8c15a2
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/deallocate_error_3.f90
@@ -0,0 +1,9 @@
+! { dg-do compile }
+! PR fortran/82994
+! Code contributed by Gerhard Steinmetz
+program p
+   type t
+   end type
+   class(t) :: x  ! { dg-error "must be dummy, allocatable or pointer" }
+   deallocate (x) ! { dg-error "not a nonprocedure pointer nor an allocatable" }
+end
diff --git a/gcc/testsuite/gfortran.dg/deallocate_error_4.f90 b/gcc/testsuite/gfortran.dg/deallocate_error_4.f90
new file mode 100644
index 000000000000..c12e776dd275
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/deallocate_error_4.f90
@@ -0,0 +1,10 @@
+! { dg-do compile }
+! PR fortran/82994
+! Code contributed by Gerhard Steinmetz
+program p
+   type t
+   end type
+   class(t) :: x  ! { dg-error "must be dummy, allocatable or pointer" }
+   allocate (x)   ! { dg-error "neither a data pointer nor an allocatable" }
+   deallocate (x) ! { dg-error "not a nonprocedure pointer nor an allocatable" }
+end