re PR fortran/84957 (ICE in gfc_sym_type, at fortran/trans-types.c:2255)

2018-03-21  Thomas Koenig  <tkoenig@gcc.gnu.org>
	Harald Anlauf  <anlauf@gmx.de>

	PR fortran/84957
	* trans-types.c (gfc_sym_type): Do not dereference NULL pointer.

2018-03-21  Thomas Koenig  <tkoenig@gcc.gnu.org>
	Harald Anlauf  <anlauf@gmx.de>

	PR fortran/84957
	* gfortran.dg/pr84957.f90: New test.


Co-Authored-By: Harald Anlauf <anlauf@gmx.de>

From-SVN: r258745

gcc/fortran/ChangeLog

+2018-03-21  Thomas Koenig  <tkoenig@gcc.gnu.org>
+	Harald Anlauf  <anlauf@gmx.de>
+
+	PR fortran/84957
+	* trans-types.c (gfc_sym_type): Do not dereference NULL pointer.
+
 2018-03-21  Janne Blomqvist  <jb@gcc.gnu.org>
 
 	PR fortran/84615

gcc/fortran/trans-types.c

@@ -2252,6 +2252,7 @@ gfc_sym_type (gfc_symbol * sym)
       && sym->ts.type == BT_CHARACTER
       && sym->ts.u.cl->backend_decl == NULL_TREE
       && sym->ns->proc_name
+      && sym->ns->proc_name->ts.u.cl
       && sym->ns->proc_name->ts.u.cl->backend_decl != NULL_TREE)
     sym->ts.u.cl->backend_decl = sym->ns->proc_name->ts.u.cl->backend_decl;
 

gcc/testsuite/ChangeLog

+2018-03-21  Thomas Koenig  <tkoenig@gcc.gnu.org>
+	Harald Anlauf  <anlauf@gmx.de>
+
+	PR fortran/84957
+	* gfortran.dg/pr84957.f90: New test.
+
 2018-03-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/84960

gcc/testsuite/gfortran.dg/pr84957.f90

+! { dg-do compile }
+! PR 84957
+!
+! Testcase derived from PR by G. Steinmetz  <gscfq@t-online.de>
+!
+function f() result(u)
+  entry g() result(v)
+contains
+  function v(x) result(z)
+    character :: x(2)
+    character(sum(len_trim(x))) :: z
+  end function v
+  function u(x) result(z)
+    character :: x(2)
+    character(sum(len_trim(x))) :: z
+  end function u
+end function f