expr.c (ffeexpr_token_arguments_): Make sure outer exprstack isn't null.

	* expr.c (ffeexpr_token_arguments_): Make sure
	outer exprstack isn't null.

From-SVN: r18190

gcc/f/ChangeLog

+Fri Feb 20 12:45:53 1998  Craig Burley  <burley@gnu.org>
+
+	* expr.c (ffeexpr_token_arguments_): Make sure
+	outer exprstack isn't null.
+
 Fri Feb 20 10:11:20 1998  Craig Burley  <burley@gnu.org>
 
 	* Make-lang.in (f77.install-info): Fix typo in script.

gcc/f/expr.c

@@ -18540,6 +18540,7 @@ ffeexpr_token_arguments_ (ffelexToken ft, ffebld expr, ffelexToken t)
 	     only if next token isn't the close-paren for REAL(me).  */
 
 	  if ((ffeexpr_stack_->previous != NULL)
+	      && (ffeexpr_stack_->previous->exprstack != NULL)
 	      && (ffeexpr_stack_->previous->exprstack->type == FFEEXPR_exprtypeOPERAND_)
 	      && ((reduced = ffeexpr_stack_->previous->exprstack->u.operand) != NULL)
 	      && (ffebld_op (reduced) == FFEBLD_opSYMTER)

gcc/f/news.texi

@@ -27,6 +27,10 @@ involve a combination of these elements.
 @heading In 0.5.22:
 @itemize @bullet
 @item
+Fix a compiler crash on statements such as
+@samp{PRINT *, (REAL(Z(I)),I=1,2)}, where
+@samp{Z} is @code{DOUBLE COMPLEX}.
+
 @item
 Improve diagnostic messages from @code{libf2c}
 so it is more likely that the printing of the
@@ -47,6 +51,7 @@ is a constant.
 This provides a cleaner run-time diagnostic as provided
 by @code{libf2c} for statements like @samp{PRINT '(I1', 42}.
 
+@item
 Fix @code{SIGNAL} intrinsic so it offers portable
 support for 64-bit systems (such as Digital Alphas
 running GNU/Linux).