No nets under "Sources:" in global routing congestion progress reports

[oharboe]

To reproduce:

1. Comment out GLOBAL_ROUTE_ARGS, see below:
2. Run make DESIGN_CONFIG=designs/sky130hd/microwatt/config.mk results/sky130hd/microwatt/base/5_1_grt.odb
3. While global route is running, start a new shell, run ls reports/sky130hd/microwatt/base/congestion*.rpt. When you see .rpt files appearing, run make DESIGN_CONFIG=designs/sky130hd/microwatt/config.mk gui_cts and load for instance reports/sky130hd/microwatt/base/congestion-10.rpt
4. Look at DRC errors, there's no information about which nets are congested.

$ git diff
diff --git a/flow/designs/sky130hd/microwatt/config.mk b/flow/designs/sky130hd/microwatt/config.mk
index 4b4eb79d..90745a5d 100644
--- a/flow/designs/sky130hd/microwatt/config.mk
+++ b/flow/designs/sky130hd/microwatt/config.mk
@@ -31,4 +31,4 @@ export CTS_CLUSTER_SIZE = 30
 
 export export SETUP_SLACK_MARGIN = 0.2
 
-export GLOBAL_ROUTE_ARGS=-congestion_iterations 100 -verbose
+#export GLOBAL_ROUTE_ARGS=-congestion_iterations 100 -verbose

Originally posted by @oharboe in The-OpenROAD-Project/OpenROAD-flow-scripts#1338 (reply in thread)

What I expected was to see nets in the progress reports, like I get in the final report:

[rovinski]

Resolved?