[INFO] cloning repository https://github.com/prashant-2204/user_backend_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/prashant-2204/user_backend_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprashant-2204%2Fuser_backend_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprashant-2204%2Fuser_backend_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5a6f065340c1216b3fd94e1d8c1f93e56664d04
[INFO] checking prashant-2204/user_backend_rust against 012c0bd4d516934012c9a1ecb26e9eb283d2ed75 for pr-133502-29
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprashant-2204%2Fuser_backend_rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/prashant-2204/user_backend_rust
[INFO] finished tweaking git repo https://github.com/prashant-2204/user_backend_rust
[INFO] tweaked toml for git repo https://github.com/prashant-2204/user_backend_rust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/prashant-2204/user_backend_rust on toolchain 012c0bd4d516934012c9a1ecb26e9eb283d2ed75
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012c0bd4d516934012c9a1ecb26e9eb283d2ed75" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/prashant-2204/user_backend_rust 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" "+012c0bd4d516934012c9a1ecb26e9eb283d2ed75" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] fd6dfad00e249b845eb490cd558b27bb102dbe07066fe19cf342046b1314e7b1
[INFO] running `Command { std: "docker" "start" "fd6dfad00e249b845eb490cd558b27bb102dbe07066fe19cf342046b1314e7b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd6dfad00e249b845eb490cd558b27bb102dbe07066fe19cf342046b1314e7b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "fd6dfad00e249b845eb490cd558b27bb102dbe07066fe19cf342046b1314e7b1" "/opt/rustwide/cargo-home/bin/cargo" "+012c0bd4d516934012c9a1ecb26e9eb283d2ed75" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd6dfad00e249b845eb490cd558b27bb102dbe07066fe19cf342046b1314e7b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "fd6dfad00e249b845eb490cd558b27bb102dbe07066fe19cf342046b1314e7b1" "/opt/rustwide/cargo-home/bin/cargo" "+012c0bd4d516934012c9a1ecb26e9eb283d2ed75" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]     Checking user_backend v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/handlers/user_handlers.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |         Ok(mut cursor) => {
[INFO] [stdout]    |            ----^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/handlers/user_handlers.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |         Ok(mut cursor) => {
[INFO] [stdout]    |            ----^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused dependency `futures`
[INFO] [stderr]  --> Cargo.toml:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | futures = "0.3"
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `futures`
[INFO] [stderr] warning: `user_backend` (manifest) generated 1 warning
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 35s
[INFO] running `Command { std: "docker" "inspect" "fd6dfad00e249b845eb490cd558b27bb102dbe07066fe19cf342046b1314e7b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd6dfad00e249b845eb490cd558b27bb102dbe07066fe19cf342046b1314e7b1", kill_on_drop: false }`
[INFO] [stdout] fd6dfad00e249b845eb490cd558b27bb102dbe07066fe19cf342046b1314e7b1