go generate ./... fails with a segmentation fault

[sid-maddy]

It seems the deps job in the lint workflow has been silently failing, due to enumer exiting with a segmentation fault (and protoc not being installed or available on the PATH).
Most recent failure as of this comment: https://github.com/grafana/k6/actions/runs/12598439266/job/35113278833#step:5:594

Originally posted by @sid-maddy in #2998

Output of go generate ./...: https://github.com/user-attachments/files/18309644/go-generate-output.txt

grafana/k6 branch: master
Go version: 1.23

[oleiade]

I have been unable to reproduce with go 1.22.6:

Trying with go 1.23.

[oleiade]

Unable to reproduce with v1.23 either:

[oleiade]

I'm using the latest up-to-date version of mac OS, with go 1.23.4, and have freshly reinstalled enumer and easyjson. Can you tell us more about your system, toolchain, and how we might be able to reproduce this SEGFAULT please? 🙇🏻

[sid-maddy]

The output I shared in the issue description was using Ubuntu 24.04, Go v1.23.4 (installed using https://mise.jdx.dev).

I'm able to reproduce the issue using macOS Sequoia (15.1.1), Go v1.22.10 and v1.23.4 (both re-installed using mise as well).

With Go v1.22.10: https://github.com/user-attachments/files/18317957/go-generate-output-go1.22.10-macos.txt
With Go v1.23.4: https://github.com/user-attachments/files/18318080/go-generate-output-go1.23.4_macos.txt

[sid-maddy]

I'm also able to reproduce the issue using Go (v1.23.4) installed from Homebrew: https://github.com/user-attachments/files/18318275/go-generate-output-go1.23.4-homebrew-macos.txt

[oleiade]

Thanks for the context folks 🙇🏻

I was indeed able to reproduce. Dockerfile for reference:

FROM ubuntu:latest

# Install dependencies
RUN apt-get update && apt-get install -y \
    curl \
    git \
    build-essential \
    unzip \
    && rm -rf /var/lib/apt/lists/*

# Install Go (latest version)
RUN curl -OL https://go.dev/dl/go1.23.4.linux-amd64.tar.gz && \
    tar -C /usr/local -xzf go1.23.4.linux-amd64.tar.gz && \
    rm go1.23.4.linux-amd64.tar.gz

# Install `protoc`
RUN curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v24.4/protoc-24.4-linux-x86_64.zip && \
    unzip protoc-24.4-linux-x86_64.zip -d /usr/local && \
    rm protoc-24.4-linux-x86_64.zip

# Set environment variables
ENV PATH="/usr/local/go/bin:$PATH" GOPATH="/root/go"
ENV PATH="$GOPATH/bin:$PATH"

# Create directory for project
WORKDIR /usr/src/app

# Install `protoc-gen-go` plugin for Go
RUN go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
RUN go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest

# Install dependencies
RUN go install github.com/mailru/easyjson/[email protected]
RUN go install github.com/alvaroloes/[email protected]
RUN go install mvdan.cc/gofumpt@latest

# Download k6's latest master
RUN git clone https://github.com/grafana/k6

# Change directory to k6
WORKDIR /usr/src/app/k6

# Run go generate to assert whether it segfaults
RUN go generate ./...

Investigating some more 🔍