re PR fortran/77532 ([F03] ICE in check_dtio_interface1, at fortran/interface.c:4622)

2016-09-10  Paul Thomas  <pault@gcc.gnu.org>
	    Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/77532
	^ interface.c (check_dtio_arg_TKR_intent): Return after error.
	(check_dtio_interface1): Remove asserts, test for NULL and return
	if found.

	gfortran.dg/dtio_11.f90: new test.

Co-Authored-By: Steven G. Kargl <kargl@gcc.gnu.org>

From-SVN: r240074

4 files changed, 65 insertions, 6 deletions

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index bcaf444..188871b 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,11 @@
+2016-09-10  Paul Thomas  <pault@gcc.gnu.org>
+	    Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/77532
+	^ interface.c (check_dtio_arg_TKR_intent): Return after error.
+	(check_dtio_interface1): Remove asserts, test for NULL and return
+	if found.
+
 2016-09-09  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/77420
diff --git a/gcc/fortran/interface.c b/gcc/fortran/interface.c
index fece316..45a9afe 100644
--- a/gcc/fortran/interface.c
+++ b/gcc/fortran/interface.c
@@ -4559,8 +4559,11 @@ check_dtio_arg_TKR_intent (gfc_symbol *fsym, bool typebound, bt type,
 			   int kind, int rank, sym_intent intent)
 {
   if (fsym->ts.type != type)
-    gfc_error ("DTIO dummy argument at %L must be of type %s",
-	       &fsym->declared_at, gfc_basic_typename (type));
+    {
+      gfc_error ("DTIO dummy argument at %L must be of type %s",
+		 &fsym->declared_at, gfc_basic_typename (type));
+      return;
+    }
 
   if (fsym->ts.type != BT_CLASS && fsym->ts.type != BT_DERIVED
       && fsym->ts.kind != kind)
@@ -4606,20 +4609,23 @@ check_dtio_interface1 (gfc_symbol *derived, gfc_symtree *tb_io_st,
     {
       /* Typebound DTIO binding.  */
       tb_io_proc = tb_io_st->n.tb;
-      gcc_assert (tb_io_proc != NULL);
+      if (tb_io_proc == NULL)
+	return;
+
       gcc_assert (tb_io_proc->is_generic);
       gcc_assert (tb_io_proc->u.generic->next == NULL);
 
       specific_proc = tb_io_proc->u.generic->specific;
-      gcc_assert (!specific_proc->is_generic);
+      if (specific_proc == NULL || specific_proc->is_generic)
+	return;
 
       dtio_sub = specific_proc->u.specific->n.sym;
     }
   else
     {
       generic_proc = tb_io_st->n.sym;
-      gcc_assert (generic_proc);
-      gcc_assert (generic_proc->generic);
+      if (generic_proc == NULL || generic_proc->generic == NULL)
+	return;
 
       for (intr = tb_io_st->n.sym->generic; intr; intr = intr->next)
 	{
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9dbf11d..7acd162 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2016-09-10  Paul Thomas  <pault@gcc.gnu.org>
+	    Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/77532
+	gfortran.dg/dtio_11.f90: new test.
+
 2016-09-10  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/77507
diff --git a/gcc/testsuite/gfortran.dg/dtio_11.f90 b/gcc/testsuite/gfortran.dg/dtio_11.f90
new file mode 100644
index 0000000..cf8dd36
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dtio_11.f90
@@ -0,0 +1,39 @@
+! { dg-do compile }
+!
+! Test fixes for PRs77532-4.
+!
+! Contributed by Gerhard Steinmetz  <gerhard.steinmetz.fortran@t-online.de>
+!
+! PR77532 - used to ICE
+module m1
+   type t
+   end type
+   interface read(unformatted)
+   end interface
+end
+
+! PR77533 - used to ICE after error
+module m2
+   type t
+      type(unknown), pointer :: next ! { dg-error "is a type that has not been declared" }
+   contains
+      procedure :: s
+      generic :: write(formatted) => s
+   end type
+contains
+   subroutine s(x)
+   end
+end
+
+! PR77533 comment #1 - gave warning that
+module m3
+   type t
+   contains
+      procedure :: s ! { dg-error "Non-polymorphic passed-object" }
+      generic :: write(formatted) => s
+   end type
+contains
+   subroutine s(x) ! { dg-error "must be of type CLASS" }
+      class(t), intent(in) : x ! { dg-error "Invalid character in name" }
+   end
+end