re PR fortran/71861 ([F03] ICE in write_symbol(): bad module symbol)

fix PR 71861

2019-03-20  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/71861
	* symbol.c (check_conflict): ABSTRACT attribute conflicts with
	INTRINSIC attribute.

2019-03-20  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/71861
	* gfortran.dg/interface_abstract_5.f90: New test case.

From-SVN: r269827

gcc/fortran/ChangeLog

+2019-03-20  Janus Weil  <janus@gcc.gnu.org>
+
+	PR fortran/71861
+	* symbol.c (check_conflict): ABSTRACT attribute conflicts with
+	INTRINSIC attribute.
+
 2019-03-18  Thomas Koenig  <tkoeng@gcc.gnu.org>
 
 	PR fortran/68009

gcc/fortran/symbol.c

@@ -557,6 +557,7 @@ check_conflict (symbol_attribute *attr, const char *name, locus *where)
 
   conf (external, intrinsic);
   conf (entry, intrinsic);
+  conf (abstract, intrinsic);
 
   if ((attr->if_source == IFSRC_DECL && !attr->procedure) || attr->contained)
     conf (external, subroutine);

gcc/testsuite/ChangeLog

+2019-03-20  Janus Weil  <janus@gcc.gnu.org>
+
+	PR fortran/71861
+	* gfortran.dg/interface_abstract_5.f90: New test case.
+
 2019-03-20  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/89775

gcc/testsuite/gfortran.dg/interface_abstract_5.f90

+! { dg-do compile }
+!
+! PR 71861: [7/8/9 Regression] [F03] ICE in write_symbol(): bad module symbol
+!
+! Contributed by Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de>
+
+module m1
+   intrinsic abs
+   abstract interface
+      function abs(x)    ! { dg-error "ABSTRACT attribute conflicts with INTRINSIC attribute" }
+         real :: abs, x
+      end
+   end interface
+end
+
+module m2
+   abstract interface
+      function abs(x)
+         real :: abs, x
+      end
+   end interface
+   intrinsic abs    ! { dg-error "ABSTRACT attribute conflicts with INTRINSIC attribute" }
+end
+
+module m3
+   abstract interface
+      function f(x)
+         real :: f, x
+      end
+   end interface
+   intrinsic f    ! { dg-error "ABSTRACT attribute conflicts with INTRINSIC attribute" }
+end