From 1fa08dcac686ca5b6d84e64c9f5813daef59f540 Mon Sep 17 00:00:00 2001
From: Harald Anlauf <anlauf@gmx.de>
Date: Wed, 8 Jul 2020 20:53:12 +0200
Subject: [PATCH] PR fortran/96085 - ICE in gfc_finish_var_decl, at
 fortran/trans-decl.c:694

Legacy ASSIGN requires a scalar integer variable.  Reject parameter
arguments.

gcc/fortran/
	PR fortran/96085
	* resolve.c (gfc_resolve_code): Check whether assign target is a
	parameter.
---
 gcc/fortran/resolve.c                 |  1 +
 gcc/testsuite/gfortran.dg/pr96085.f90 | 12 ++++++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 gcc/testsuite/gfortran.dg/pr96085.f90

diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index 223dcccce91..6bc1c46a97d 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -11900,6 +11900,7 @@ start:
 		  || code->expr1->symtree->n.sym->ts.type != BT_INTEGER
 		  || code->expr1->symtree->n.sym->ts.kind
 		     != gfc_default_integer_kind
+		  || code->expr1->symtree->n.sym->attr.flavor == FL_PARAMETER
 		  || code->expr1->symtree->n.sym->as != NULL))
 	    gfc_error ("ASSIGN statement at %L requires a scalar "
 		       "default INTEGER variable", &code->expr1->where);
diff --git a/gcc/testsuite/gfortran.dg/pr96085.f90 b/gcc/testsuite/gfortran.dg/pr96085.f90
new file mode 100644
index 00000000000..82b1cdec0f6
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr96085.f90
@@ -0,0 +1,12 @@
+! { dg-do compile }
+! { dg-options "-std=legacy" }
+! PR fortran/96085 - ICE in gfc_finish_var_decl, at fortran/trans-decl.c:694
+
+module m
+  integer, parameter :: a = 1
+contains
+  subroutine s
+    assign 2 to a   ! { dg-error "requires a scalar default INTEGER variable" }
+2   print *, a
+  end
+end
-- 
2.30.2