From f835c7569e9ae910e4780b3c5c00a6cb1bd07369 Mon Sep 17 00:00:00 2001
From: Cary R <cygcary@yahoo.com>
Date: Fri, 8 Aug 2008 16:34:24 -0700
Subject: [PATCH] Check for a possible corrupt function definition and return.

If a function definition has no ports and no return type it is
assumed to be a bad definition so we don't check it further.
---
 elab_sig.cc | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/elab_sig.cc b/elab_sig.cc
index cccac8ba7..ae2221d1c 100644
--- a/elab_sig.cc
+++ b/elab_sig.cc
@@ -589,9 +589,17 @@ void PFunction::elaborate_sig(Design*des, NetScope*scope) const
 	    break;
 
 	  default:
-	    cerr << get_fileline() << ": internal error: I don't know how "
-		 << "to deal with return type of function "
-		 << scope->basename() << "." << endl;
+	    if (ports_) {
+		  cerr << get_fileline() << ": internal error: I don't know "
+		       << "how to deal with return type of function "
+		       << scope->basename() << "." << endl;
+	    } else {
+		    /* If we do not have any ports or a return type this
+		     * is probably a bad function definition. */
+		  cerr << get_fileline() << ": error: Bad definition for "
+		       << "function " << scope->basename() << "?" << endl;
+		  return;
+	    }
       }
 
       svector<NetNet*>ports (ports_? ports_->count() : 0);