nextpnr-himbaechel core dumps on simple gowin example design

[philtomson]

I was told on IRC that nextpnr-gowin in deprecated and to use nextpnr-himbaechel. I ran the following commandline:

$ nextpnr-himbaechel --json counter.json --write counter_pnr.json --freq 27 --device GW1NR-LV9QN88PC6/I5 --vopt family=GW1N-9C --vopt cst=tangnano9k.cst

With this result:
Info: Using uarch 'gowin' for device 'GW1NR-LV9QN88PC6/I5'
terminate called after throwing an instance of 'nextpnr_himbaechel::assertion_failure'
what(): Assertion failure: int(ctx->idstring_idx_to_str->size()) == idx (/work/_builds/linux-x64/nextpnr-himbaechel/nextpnr/common/kernel/idstring.cc:46)
Aborted (core dumped)

This was the nextpnr-himbaechel from the 2025_02_11 oss-cad-suite release build (today's). I happened to have an older version of oss-cad-suite (2024_2_16) and tried running the exact same command line and it works (does not core dump, successfully creates a counter_pnr.json file)

For the design files see: https://github.com/lushaylabs/tangnano9k-series-examples/tree/master/counter (counter.v tangnano9k.cst)

[whitequark]

cc @yrabbit

[yrabbit]

Same thing? #1452