[INFO] cloning repository https://github.com/1kbgz/fsspec-browser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/1kbgz/fsspec-browser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1kbgz%2Ffsspec-browser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1kbgz%2Ffsspec-browser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a88a09051df95cb9c5b29a96ca72084a420f72cd
[INFO] checking 1kbgz/fsspec-browser against 52995a223f2919dd3e2e427231db90a257350ded for pr-129249-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1kbgz%2Ffsspec-browser" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/1kbgz/fsspec-browser
[INFO] finished tweaking git repo https://github.com/1kbgz/fsspec-browser
[INFO] tweaked toml for git repo https://github.com/1kbgz/fsspec-browser written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/1kbgz/fsspec-browser on toolchain 52995a223f2919dd3e2e427231db90a257350ded
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/1kbgz/fsspec-browser already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 3419461a811b2114e740f95e863a878c6555d6dc397588404fa7e2dde6f28f87
[INFO] running `Command { std: "docker" "start" "3419461a811b2114e740f95e863a878c6555d6dc397588404fa7e2dde6f28f87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3419461a811b2114e740f95e863a878c6555d6dc397588404fa7e2dde6f28f87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3419461a811b2114e740f95e863a878c6555d6dc397588404fa7e2dde6f28f87" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3419461a811b2114e740f95e863a878c6555d6dc397588404fa7e2dde6f28f87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3419461a811b2114e740f95e863a878c6555d6dc397588404fa7e2dde6f28f87" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] error: useless conversion to the same type: `PyErr`
[INFO] [stdout]    --> rust/python/lib.rs:162:54
[INFO] [stdout]     |
[INFO] [stdout] 162 | fn run_browser(py: Python<'_>, argv: Vec<String>) -> PyResult<()> {
[INFO] [stdout]     |                                                      ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `PyErr`
[INFO] [stdout]    --> rust/python/lib.rs:162:54
[INFO] [stdout]     |
[INFO] [stdout] 162 | fn run_browser(py: Python<'_>, argv: Vec<String>) -> PyResult<()> {
[INFO] [stdout]     |                                                      ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fsspec_browser_py` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `fsspec_browser_py` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "3419461a811b2114e740f95e863a878c6555d6dc397588404fa7e2dde6f28f87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3419461a811b2114e740f95e863a878c6555d6dc397588404fa7e2dde6f28f87", kill_on_drop: false }`
[INFO] [stdout] 3419461a811b2114e740f95e863a878c6555d6dc397588404fa7e2dde6f28f87