bug: tutorial flow fails on CTS

[tampler]

Subject

[Flow] for any util, flow Makefile, or flow script issues.

Describe the bug

I'm trying to run a demo script from docs

Running the commands:

cd ./OpenROAD-flow-scripts
source env.sh
cd flow
make DESIGN_CONFIG=./designs/sky130hd/ibex/config.mk

After a while, got an error:

Error: cts.tcl, 86 child killed: illegal instruction                                                                                                                         
Command exited with non-zero status 1                                                                                                                                        
Elapsed time: 0:19.20[h:]min:sec. CPU time: user 51.02 sys 10.66 (321%). Peak memory: 229344KB.                                      
make[1]: *** [Makefile:512: do-4_1_cts] Error 1                                                                                                                              
make: *** [Makefile:512: results/sky130hd/ibex/base/4_1_cts.odb] Error 2 

Expected Behavior

Flow returns successfully

Environment

OPENROAD: /home/bku/work/go/src/gitpond.cc/eda/OpenROAD-flow-scripts/tools/OpenROAD

OS: Ubuntu 24.04
OR: OpenROAD 26Q1-2878-g770511339f
Yosys: Yosys 0.63 (git sha1 d3e297fcd, g++ 13.3.0-6ubuntu2~24.04.1 -fPIC -O3) [the-openroad-project/yosys]

To Reproduce

cd ./OpenROAD-flow-scripts
source env.sh
cd flow
make DESIGN_CONFIG=./designs/sky130hd/ibex/config.mk

Relevant log output

Screenshots

No response

Additional Context

No response

[mi-and-core]

I'm not involved, but ORFS/OR are "moving targets".

At least with a current ORFS installation and

OS: Ubuntu 24.04
OR OpenROAD 26Q1-2923-gf2408812b6
Yosys: Yosys 0.63

it works as expected.