From 32517dfb04214da80b9174011955c74520a7799b Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddieh@ece.ubc.ca>
Date: Sun, 11 Nov 2018 13:19:50 -0800
Subject: [PATCH] [timing] Better messaging for failed timing analysis, allow
 --force to continue

---
 common/timing.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/common/timing.cc b/common/timing.cc
index d1a85779..889880d4 100644
--- a/common/timing.cc
+++ b/common/timing.cc
@@ -166,8 +166,11 @@ struct Timing
                     log_info("   remaining fanin includes %s (no net)\n", fanin.first->name.c_str(ctx));
                 }
             }
+            if (ctx->force)
+                log_warning("timing analysis failed due to presence of combinational loops, incomplete specification of timing ports, etc.\n");
+            else
+                log_error("timing analysis failed due to presence of combinational loops, incomplete specification of timing ports, etc.\n");
         }
-        NPNR_ASSERT(port_fanin.empty());
 
         // Go forwards topographically to find the maximum arrival time and max path length for each net
         for (auto net : topographical_order) {