Description

I was increasing SYNTH_MAX_FANOUT to try to remove the warning about fanout. At 15, the PDN fails and the flow stops with an error.

Environment

python3 ./env.py issue-survey
Kernel: Linux v5.15.0-41-generic
Distribution: ubuntu 20.04
Python: v3.8.10 (OK)
Container Engine: docker v20.10.7 (OK)
OpenLane Git Version: f9b5781f5ef0bbdf39ab1c2bbd78be8db11b27f2
pip: INSTALLED
pip:venv: INSTALLED
---
PDK Version Verification Status: OK
---
Git Log (Last 3 Commits)

f9b5781 2022-07-01T16:04:31+02:00 Fix a bug with `-overwrite` (#1171) - Anton Blanchard -  (grafted, HEAD, tag: 2022.07.02_01.38.08)

Reproduction Material

• Upload a tarball containing the relevant design. Have done. Didn't bother with issue_reproducible - see below.

RUN_2022.07.27_14.37.12.tar.gz

./flow -design seven_segment_seconds

Expected behavior

Tools should finish the flow.

Other questions

Why is issue_reproducible so huge? The uncompressed directory is 7.2GB. I had a quick look and it seems to recursively pack itself.
28k files. Compressed with tar.gz -> 1.2GB. Didn't bother attaching here.