"Plugin killed by signal 9" error when generating Python code

[Ben Karl]

I'm trying to generate Python code from the Google Ads protos without specifying a template, and I consistently run into the error:

--python_gapic_out: protoc-gen-python_gapic: Plugin killed by signal 9.

Our BUILD file is here and on this line you can see where we specify that protoc should use the ads-specific templates defined here. When I remove that line before running gbazelisk, I always get the above error.

Any help to identify what's causing the error would be greatly appreciated. Let me know if I can provide any other information.