Error generating files

[pmenon]

I'm getting the following error using this plugin from rules_proto_grpc:

thread 'main' panicked at 'no source code info in request', external/crate-index__prost-build-0.11.1/src/code_generator.rs:56:14
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
--rust_prost_plugin_out: protoc-gen-rust_prost_plugin: Plugin failed with status code 101.

Bazel version is 5.3.0. Any reason this might be occuring?

[neoeinstein]

Prost-build expects to be able to find source code info from the protoc compiler so that it can include doc comments from the original protoc file. Without any valid source info, prost-build will error out. It sounds like you're using a non-standard protobuf compiler, which may not provide this source info. It's possible that we could support this by providing a default empty source info if none is provided, but there may be deeper expectations within prost-build itself that would expect to find some source info (even if empty) for every item.

[bpalermo]

@neoeinstein any chance this is fixed in the newer version?
https://github.com/tokio-rs/prost/blob/master/prost-build/src/code_generator.rs#L54