[INFO] fetching crate serser 0.1.0...
[INFO] checking serser-0.1.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate serser 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate serser 0.1.0
[INFO] finished tweaking crates.io crate serser 0.1.0
[INFO] tweaked toml for crates.io crate serser 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serser 0.1.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] caf3f3c55fa8604a7d5ed99a7738ca752bd864b60180865b057af5cca8c474d6
[INFO] running `Command { std: "docker" "start" "-a" "caf3f3c55fa8604a7d5ed99a7738ca752bd864b60180865b057af5cca8c474d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "caf3f3c55fa8604a7d5ed99a7738ca752bd864b60180865b057af5cca8c474d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caf3f3c55fa8604a7d5ed99a7738ca752bd864b60180865b057af5cca8c474d6", kill_on_drop: false }`
[INFO] [stdout] caf3f3c55fa8604a7d5ed99a7738ca752bd864b60180865b057af5cca8c474d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e1ce6ed00b5f7c83b0b9c6301c847f68c89b80a5a7e8d399414a9e014dd3af7
[INFO] running `Command { std: "docker" "start" "-a" "6e1ce6ed00b5f7c83b0b9c6301c847f68c89b80a5a7e8d399414a9e014dd3af7", kill_on_drop: false }`
[INFO] [stderr]     Checking base64 v0.22.1
[INFO] [stderr]     Checking maybe-owned v0.3.4
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling serser_derive v0.1.0
[INFO] [stderr]     Checking serser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `AnEnum` is never used
[INFO] [stdout]    --> tests/derive_from_tokens.rs:172:14
[INFO] [stdout]     |
[INFO] [stdout] 172 |         enum AnEnum {}
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.52s
[INFO] running `Command { std: "docker" "inspect" "6e1ce6ed00b5f7c83b0b9c6301c847f68c89b80a5a7e8d399414a9e014dd3af7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e1ce6ed00b5f7c83b0b9c6301c847f68c89b80a5a7e8d399414a9e014dd3af7", kill_on_drop: false }`
[INFO] [stdout] 6e1ce6ed00b5f7c83b0b9c6301c847f68c89b80a5a7e8d399414a9e014dd3af7