commit bed3849427d1fcaec7c466a8326a30232278323b
author kmurray <k.murray@utoronto.ca> Mon Oct 28 17:04:37 2019 -0400
committer kmurray <k.murray@utoronto.ca> Mon Oct 28 17:04:37 2019 -0400
tree 48684bd25cf534bda8aec59bd75a1ef3f4dcfa54
parent 4d1052d5566dcc0659e0a2bd13f2fec48cf6076c

vpr: Fix segfault when reporting errors with no timing graph

vpr/src/base/vpr_tatum_error.cpp

diff --git a/vpr/src/base/vpr_tatum_error.cpp b/vpr/src/base/vpr_tatum_error.cpp
index 61504da..37dfaa4 100644
--- a/vpr/src/base/vpr_tatum_error.cpp
+++ b/vpr/src/base/vpr_tatum_error.cpp
@@ -45,24 +45,27 @@
     }
 
     if (error.edge) {
-        tatum::NodeId src_node = timing_ctx.graph->edge_src_node(error.edge);
-        tatum::NodeId sink_node = timing_ctx.graph->edge_sink_node(error.edge);
 
-        AtomPinId src_pin = atom_ctx.lookup.tnode_atom_pin(src_node);
-        AtomPinId sink_pin = atom_ctx.lookup.tnode_atom_pin(sink_node);
+        if (timing_ctx.graph) {
+            tatum::NodeId src_node = timing_ctx.graph->edge_src_node(error.edge);
+            tatum::NodeId sink_node = timing_ctx.graph->edge_sink_node(error.edge);
 
-        if (src_pin && sink_pin) {
-            msg += "Between netlist pins ";
+            AtomPinId src_pin = atom_ctx.lookup.tnode_atom_pin(src_node);
+            AtomPinId sink_pin = atom_ctx.lookup.tnode_atom_pin(sink_node);
 
-            msg += "'" + atom_ctx.nlist.pin_name(src_pin) + "' -> '" + atom_ctx.nlist.pin_name(sink_pin) + "'";
+            if (src_pin && sink_pin) {
+                msg += "Between netlist pins ";
 
-            AtomNetId src_net = atom_ctx.nlist.pin_net(src_pin);
-            AtomNetId sink_net = atom_ctx.nlist.pin_net(sink_pin);
-            if (src_net && src_net == sink_net) {
-                msg += " via net '" + atom_ctx.nlist.net_name(src_net) + "'";
+                msg += "'" + atom_ctx.nlist.pin_name(src_pin) + "' -> '" + atom_ctx.nlist.pin_name(sink_pin) + "'";
+
+                AtomNetId src_net = atom_ctx.nlist.pin_net(src_pin);
+                AtomNetId sink_net = atom_ctx.nlist.pin_net(sink_pin);
+                if (src_net && src_net == sink_net) {
+                    msg += " via net '" + atom_ctx.nlist.net_name(src_net) + "'";
+                }
+
+                msg += ", ";
             }
-
-            msg += ", ";
         }
 
         msg += "Timing Graph Edge: " + std::to_string(size_t(error.edge));