[INFO] cloning repository https://github.com/thevaibhav-dixit/rust-learnings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thevaibhav-dixit/rust-learnings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthevaibhav-dixit%2Frust-learnings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthevaibhav-dixit%2Frust-learnings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5845e67b556b5a29b9477aec05dea7d851210eec
[INFO] checking thevaibhav-dixit/rust-learnings against try#446cb600aa4837dd6c513f14fa0d25a909b177d7 for pr-149195
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthevaibhav-dixit%2Frust-learnings" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/thevaibhav-dixit/rust-learnings
[INFO] finished tweaking git repo https://github.com/thevaibhav-dixit/rust-learnings
[INFO] tweaked toml for git repo https://github.com/thevaibhav-dixit/rust-learnings written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/thevaibhav-dixit/rust-learnings on toolchain 446cb600aa4837dd6c513f14fa0d25a909b177d7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/thevaibhav-dixit/rust-learnings 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" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 30e8b54757e91b911f94100d82fd5a4a6b14078f2afaab3be75eb1e9f9a97c53
[INFO] running `Command { std: "docker" "start" "-a" "30e8b54757e91b911f94100d82fd5a4a6b14078f2afaab3be75eb1e9f9a97c53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30e8b54757e91b911f94100d82fd5a4a6b14078f2afaab3be75eb1e9f9a97c53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30e8b54757e91b911f94100d82fd5a4a6b14078f2afaab3be75eb1e9f9a97c53", kill_on_drop: false }`
[INFO] [stdout] 30e8b54757e91b911f94100d82fd5a4a6b14078f2afaab3be75eb1e9f9a97c53
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00b2b7ba104c47ee9ff5b5e8532b7ebdd9e1ab2157dc2aa90304aa28d053fd2c
[INFO] running `Command { std: "docker" "start" "-a" "00b2b7ba104c47ee9ff5b5e8532b7ebdd9e1ab2157dc2aa90304aa28d053fd2c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]    Compiling lock_api v0.4.13
[INFO] [stderr]     Checking bytes v1.10.1
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]     Checking signal-hook-registry v1.4.5
[INFO] [stderr]     Checking mio v1.0.4
[INFO] [stderr]     Checking socket2 v0.5.10
[INFO] [stderr]     Checking parking_lot v0.12.4
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]     Checking tokio v1.45.1
[INFO] [stderr]     Checking rust-learnings v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Rpn` is never constructed
[INFO] [stdout]  --> src/rpn.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Rpn {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `eval` are never used
[INFO] [stdout]   --> src/rpn.rs:7:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl Rpn {
[INFO] [stdout]    | -------- associated items in this implementation
[INFO] [stdout]  7 |     fn new(source: String) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn eval(&mut self) -> i32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.12s
[INFO] running `Command { std: "docker" "inspect" "00b2b7ba104c47ee9ff5b5e8532b7ebdd9e1ab2157dc2aa90304aa28d053fd2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00b2b7ba104c47ee9ff5b5e8532b7ebdd9e1ab2157dc2aa90304aa28d053fd2c", kill_on_drop: false }`
[INFO] [stdout] 00b2b7ba104c47ee9ff5b5e8532b7ebdd9e1ab2157dc2aa90304aa28d053fd2c