[INFO] cloning repository https://github.com/mmahfoud/rust-expression-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mmahfoud/rust-expression-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmahfoud%2Frust-expression-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmahfoud%2Frust-expression-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d70e245ad5cf4eb1033b362ecb49a025f4816ee2
[INFO] checking mmahfoud/rust-expression-tree against try#bac5816c5f3d02cebd0599070af62d1782530294 for pr-150408
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmahfoud%2Frust-expression-tree" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mmahfoud/rust-expression-tree
[INFO] finished tweaking git repo https://github.com/mmahfoud/rust-expression-tree
[INFO] tweaked toml for git repo https://github.com/mmahfoud/rust-expression-tree written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mmahfoud/rust-expression-tree on toolchain bac5816c5f3d02cebd0599070af62d1782530294
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bac5816c5f3d02cebd0599070af62d1782530294" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mmahfoud/rust-expression-tree 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" "+bac5816c5f3d02cebd0599070af62d1782530294" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+bac5816c5f3d02cebd0599070af62d1782530294" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd7d027dfcf9d10ce96008769d34959f03cd8ff1a49d9edae54ba25ff7e799c4
[INFO] running `Command { std: "docker" "start" "-a" "cd7d027dfcf9d10ce96008769d34959f03cd8ff1a49d9edae54ba25ff7e799c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd7d027dfcf9d10ce96008769d34959f03cd8ff1a49d9edae54ba25ff7e799c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd7d027dfcf9d10ce96008769d34959f03cd8ff1a49d9edae54ba25ff7e799c4", kill_on_drop: false }`
[INFO] [stdout] cd7d027dfcf9d10ce96008769d34959f03cd8ff1a49d9edae54ba25ff7e799c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+bac5816c5f3d02cebd0599070af62d1782530294" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 970f688db0a9544ea89d0cac8399c0304f6de7a20d48a85359a9ccfca58be4da
[INFO] running `Command { std: "docker" "start" "-a" "970f688db0a9544ea89d0cac8399c0304f6de7a20d48a85359a9ccfca58be4da", kill_on_drop: false }`
[INFO] [stderr]     Checking dummy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Substraction` and `Division` are never constructed
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum BinaryOperation {
[INFO] [stdout]   |      --------------- variants in this enum
[INFO] [stdout] 5 |     Addition,
[INFO] [stdout] 6 |     Substraction,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 7 |     Multiplication,
[INFO] [stdout] 8 |     Division,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BinaryOperation` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Exp` is never constructed
[INFO] [stdout]   --> src/main.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | enum UnaryOperation {
[INFO] [stdout]    |      -------------- variant in this enum
[INFO] [stdout] 70 |     Minus,
[INFO] [stdout] 71 |     Exp,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UnaryOperation` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Substraction` and `Division` are never constructed
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum BinaryOperation {
[INFO] [stdout]   |      --------------- variants in this enum
[INFO] [stdout] 5 |     Addition,
[INFO] [stdout] 6 |     Substraction,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 7 |     Multiplication,
[INFO] [stdout] 8 |     Division,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BinaryOperation` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Exp` is never constructed
[INFO] [stdout]   --> src/main.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | enum UnaryOperation {
[INFO] [stdout]    |      -------------- variant in this enum
[INFO] [stdout] 70 |     Minus,
[INFO] [stdout] 71 |     Exp,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UnaryOperation` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "970f688db0a9544ea89d0cac8399c0304f6de7a20d48a85359a9ccfca58be4da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "970f688db0a9544ea89d0cac8399c0304f6de7a20d48a85359a9ccfca58be4da", kill_on_drop: false }`
[INFO] [stdout] 970f688db0a9544ea89d0cac8399c0304f6de7a20d48a85359a9ccfca58be4da