[INFO] fetching crate decision_tree 0.1.0...
[INFO] checking decision_tree-0.1.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate decision_tree 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate decision_tree 0.1.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate decision_tree 0.1.0
[INFO] finished tweaking crates.io crate decision_tree 0.1.0
[INFO] tweaked toml for crates.io crate decision_tree 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8b748927075c8a3003337943d955972a05c5559657c11ec3ade09ead72595932
[INFO] running `Command { std: "docker" "start" "-a" "8b748927075c8a3003337943d955972a05c5559657c11ec3ade09ead72595932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b748927075c8a3003337943d955972a05c5559657c11ec3ade09ead72595932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b748927075c8a3003337943d955972a05c5559657c11ec3ade09ead72595932", kill_on_drop: false }`
[INFO] [stdout] 8b748927075c8a3003337943d955972a05c5559657c11ec3ade09ead72595932
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 951c41e76001ec847f5185b59109679a696b149ebf2e74d193bf0586884f7e61
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "951c41e76001ec847f5185b59109679a696b149ebf2e74d193bf0586884f7e61", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]     Checking decision_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0583]: file not found for module `tree`
[INFO] [stdout]  --> examples/simple_tree.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | mod tree;
[INFO] [stdout]   | ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `tree`, create file "examples/tree.rs" or "examples/tree/mod.rs"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `node`
[INFO] [stdout]  --> examples/simple_tree.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod node;
[INFO] [stdout]   | ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `node`, create file "examples/node.rs" or "examples/node/mod.rs"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `tree::Tree`
[INFO] [stdout]  --> examples/simple_tree.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tree::{Tree};
[INFO] [stdout]   |            ^^^^ no `Tree` in `tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0583.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `decision_tree` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "951c41e76001ec847f5185b59109679a696b149ebf2e74d193bf0586884f7e61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "951c41e76001ec847f5185b59109679a696b149ebf2e74d193bf0586884f7e61", kill_on_drop: false }`
[INFO] [stdout] 951c41e76001ec847f5185b59109679a696b149ebf2e74d193bf0586884f7e61