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<https://github.com/The-OpenROAD-Project/OpenLane/issues/2050|#2050 Request to Bump Yosys (downgrade) to 0.33+6 (git sha1 41b34a193)>
Issue created by <https://github.com/dlmiles|dlmiles>
*Description*

Please consider revising the recent closed PR <https://github.com/The-OpenROAD-Project/OpenLane/pull/2027|#2027> (Bump Yosys) back a few weeks to:

`Yosys 0.33+6 (git sha1 41b34a193, clang 10.0.0-4ubuntu1 -fPIC -Os)`

Due to flow issues concerning:

<https://github.com/YosysHQ/yosys/issues/4039|YosysHQ/yosys#4039>

Please feel free to close this issue once you have considered the situation and made a verdict no matter the outcome, I provide this issue to advise of on-going matter.

Thanks

*Expected Behavior*

yosys-abc Assertion triggered after processing a significant number of designs (estimated worse than 3%)

Assertion causes STEP1 to fail due to abort/core-dump like crash, exit status 134

*Environment report*

```
Linux OpenLane docker
```

*Reproduction material*

See linked Yosys issue for test case and log outputs.

*Relevant log output*

See linked Yosys issue for test case and log outputs.
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>

<https://github.com/The-OpenROAD-Project/OpenLane/issues/2050|#2050 Request to Bump Yosys (downgrade) to 0.33+6 (git sha1 41b34a193)>
Issue closed as not planned by <https://github.com/donn|donn>
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>