ruby/rubygems · error · Gem::InstallError

cargo metadata failed#{exit_reason}

Error message

cargo metadata failed#{exit_reason}

What it means

Error "cargo metadata failed#{exit_reason}" thrown in ruby/rubygems.

Source

Thrown at lib/rubygems/ext/cargo_builder.rb:227

      rescue StandardError => error
        raise Gem::InstallError, "cargo metadata failed #{error.message}"
      end

    unless status.success?
      if Gem.configuration.really_verbose
        puts output
      else
        results << output
      end

      exit_reason =
        if status.exited?
          ", exit code #{status.exitstatus}"
        elsif status.signaled?
          ", uncaught signal #{status.termsig}"
        end

      raise Gem::InstallError, "cargo metadata failed#{exit_reason}"
    end

    # cargo metadata output is specified as json
    require "json"
    metadata = JSON.parse(output)
    package = metadata["packages"].find {|pkg| normalize_path(pkg["manifest_path"]) == manifest_path }
    unless package
      found = metadata["packages"].map {|md| "#{md["name"]} at #{md["manifest_path"]}" }
      raise Gem::InstallError, <<-EOF
failed to determine cargo package name

looking for: #{manifest_path}

found:
#{found.join("\n")}
EOF
    end
    package["name"].tr("-", "_")

View on GitHub (pinned to 86cbb817a3)

When it happens

Trigger: Thrown at lib/rubygems/ext/cargo_builder.rb:227 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ruby/rubygems@86cbb817a3 (2026-08-23). Data as JSON: /api/errors/f1da76008a178e18. Report an issue: GitHub.