[INFO] cloning repository https://github.com/pLesur/serde_slim
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pLesur/serde_slim" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FpLesur%2Fserde_slim", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FpLesur%2Fserde_slim'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 29d809a58494f4d9286112074392f77f50e3c7d3
[INFO] testing pLesur/serde_slim against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FpLesur%2Fserde_slim" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pLesur/serde_slim on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pLesur/serde_slim
[INFO] finished tweaking git repo https://github.com/pLesur/serde_slim
[INFO] tweaked toml for git repo https://github.com/pLesur/serde_slim written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/pLesur/serde_slim already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ce6822b451fb157ca1fde2340010d830e86279a567f30a31952d55c3940bf9f
[INFO] running `Command { std: "docker" "start" "-a" "5ce6822b451fb157ca1fde2340010d830e86279a567f30a31952d55c3940bf9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ce6822b451fb157ca1fde2340010d830e86279a567f30a31952d55c3940bf9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ce6822b451fb157ca1fde2340010d830e86279a567f30a31952d55c3940bf9f", kill_on_drop: false }`
[INFO] [stdout] 5ce6822b451fb157ca1fde2340010d830e86279a567f30a31952d55c3940bf9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4672cbf3d4a31dcf3c0f72dc3979acdfcda064a119cafe39547aac82432255f
[INFO] running `Command { std: "docker" "start" "-a" "e4672cbf3d4a31dcf3c0f72dc3979acdfcda064a119cafe39547aac82432255f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling serde_slim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.56s
[INFO] running `Command { std: "docker" "inspect" "e4672cbf3d4a31dcf3c0f72dc3979acdfcda064a119cafe39547aac82432255f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4672cbf3d4a31dcf3c0f72dc3979acdfcda064a119cafe39547aac82432255f", kill_on_drop: false }`
[INFO] [stdout] e4672cbf3d4a31dcf3c0f72dc3979acdfcda064a119cafe39547aac82432255f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 434be01b2b7c4a5d10d6e64710dde7f03d9a9345a5fd541464503a2409704051
[INFO] running `Command { std: "docker" "start" "-a" "434be01b2b7c4a5d10d6e64710dde7f03d9a9345a5fd541464503a2409704051", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_slim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> tests/basic.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(custom_attribute)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![register_tool]` and `#![register_attr]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `serde` in this scope
[INFO] [stdout]  --> tests/basic.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 |         #[serde(skip_serializing)]
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serde_slim`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "434be01b2b7c4a5d10d6e64710dde7f03d9a9345a5fd541464503a2409704051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "434be01b2b7c4a5d10d6e64710dde7f03d9a9345a5fd541464503a2409704051", kill_on_drop: false }`
[INFO] [stdout] 434be01b2b7c4a5d10d6e64710dde7f03d9a9345a5fd541464503a2409704051