[INFO] cloning repository https://github.com/realaravinth/mCaptcha
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/realaravinth/mCaptcha" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frealaravinth%2FmCaptcha", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frealaravinth%2FmCaptcha'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86bfa464b153bdab0c58433e2296b2887cf90c37
[INFO] checking realaravinth/mCaptcha against 895980e0290783bb09b1ccf1b11f14eb09b10430 for pr-160186
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frealaravinth%2FmCaptcha" "/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/realaravinth/mCaptcha
[INFO] finished tweaking git repo https://github.com/realaravinth/mCaptcha
[INFO] tweaked toml for git repo https://github.com/realaravinth/mCaptcha written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/realaravinth/mCaptcha on toolchain 895980e0290783bb09b1ccf1b11f14eb09b10430
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/realaravinth/mCaptcha 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" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 1187446203d82e2da02e8f15c1e1840c5d93048251f8f26774a55111d5a51122
[INFO] running `Command { std: "docker" "start" "1187446203d82e2da02e8f15c1e1840c5d93048251f8f26774a55111d5a51122", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1187446203d82e2da02e8f15c1e1840c5d93048251f8f26774a55111d5a51122", 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" "1187446203d82e2da02e8f15c1e1840c5d93048251f8f26774a55111d5a51122" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1187446203d82e2da02e8f15c1e1840c5d93048251f8f26774a55111d5a51122", 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" "1187446203d82e2da02e8f15c1e1840c5d93048251f8f26774a55111d5a51122" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]    Compiling darling v0.20.11
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[INFO] [stderr]     Checking idna_adapter v1.2.2
[INFO] [stderr]     Checking idna v1.1.0
[INFO] [stderr]     Checking url v2.5.8
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[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking redis v1.2.1
[INFO] [stderr]     Checking mcaptcha_pow_sha256 v0.5.0
[INFO] [stderr]     Checking libmcaptcha v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `log::debug`
[INFO] [stdout]   --> src/queue.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use log::debug;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::error`
[INFO] [stdout]   --> src/queue.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use log::error;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::mcaptcha`
[INFO] [stdout]    --> src/master/embedded/counter.rs:226:9
[INFO] [stdout]     |
[INFO] [stdout] 226 |     use crate::mcaptcha;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::debug`
[INFO] [stdout]   --> src/queue.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use log::debug;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/master/redis/master.rs:118:26
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn handle(&mut self, m: GetInternalData, ctx: &mut Self::Context) -> Self::Result {
[INFO] [stdout]     |                          ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> src/master/redis/master.rs:118:46
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn handle(&mut self, m: GetInternalData, ctx: &mut Self::Context) -> Self::Result {
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/master/redis/master.rs:126:26
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn handle(&mut self, m: SetInternalData, ctx: &mut Self::Context) -> Self::Result {
[INFO] [stdout]     |                          ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> src/master/redis/master.rs:126:46
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn handle(&mut self, m: SetInternalData, ctx: &mut Self::Context) -> Self::Result {
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/master/embedded/master.rs:254:13
[INFO] [stdout]     |
[INFO] [stdout] 254 |             tx.send(Ok(data));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 254 |             let _unused = tx.send(Ok(data));
[INFO] [stdout]     |             +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/master/redis/master.rs:118:26
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn handle(&mut self, m: GetInternalData, ctx: &mut Self::Context) -> Self::Result {
[INFO] [stdout]     |                          ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> src/master/redis/master.rs:118:46
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn handle(&mut self, m: GetInternalData, ctx: &mut Self::Context) -> Self::Result {
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/master/redis/master.rs:126:26
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn handle(&mut self, m: SetInternalData, ctx: &mut Self::Context) -> Self::Result {
[INFO] [stdout]     |                          ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> src/master/redis/master.rs:126:46
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn handle(&mut self, m: SetInternalData, ctx: &mut Self::Context) -> Self::Result {
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/master/embedded/master.rs:254:13
[INFO] [stdout]     |
[INFO] [stdout] 254 |             tx.send(Ok(data));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 254 |             let _unused = tx.send(Ok(data));
[INFO] [stdout]     |             +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused dependency `num_cpus`
[INFO] [stderr]   --> Cargo.toml:26:15
[INFO] [stderr]    |
[INFO] [stderr] 26 | [dependencies.num_cpus]
[INFO] [stderr]    |               ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `num_cpus`
[INFO] [stderr] warning: unused dependency `pretty_env_logger`
[INFO] [stderr]   --> Cargo.toml:30:15
[INFO] [stderr]    |
[INFO] [stderr] 30 | [dependencies.pretty_env_logger]
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `pretty_env_logger`
[INFO] [stderr] warning: `libmcaptcha` (manifest) generated 2 warnings
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 48.41s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: redis v1.2.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 10`
[INFO] running `Command { std: "docker" "inspect" "1187446203d82e2da02e8f15c1e1840c5d93048251f8f26774a55111d5a51122", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1187446203d82e2da02e8f15c1e1840c5d93048251f8f26774a55111d5a51122", kill_on_drop: false }`
[INFO] [stdout] 1187446203d82e2da02e8f15c1e1840c5d93048251f8f26774a55111d5a51122
