[INFO] cloning repository https://github.com/vimhash/number-to-letter-converter [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vimhash/number-to-letter-converter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvimhash%2Fnumber-to-letter-converter", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvimhash%2Fnumber-to-letter-converter'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 89b8b4ea6d357b14a1a346ecaf2a374cbb05375b [INFO] checking vimhash/number-to-letter-converter against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvimhash%2Fnumber-to-letter-converter" "/workspace/builds/worker-10/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/vimhash/number-to-letter-converter on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/vimhash/number-to-letter-converter [INFO] finished tweaking git repo https://github.com/vimhash/number-to-letter-converter [INFO] tweaked toml for git repo https://github.com/vimhash/number-to-letter-converter written to /workspace/builds/worker-10/source/Cargo.toml [INFO] crate git repo https://github.com/vimhash/number-to-letter-converter already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 29ba0a20a26b92d96bdb0ff0f749379d7b332b2f7db55b0c1bd8ee5450094d33 [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" "29ba0a20a26b92d96bdb0ff0f749379d7b332b2f7db55b0c1bd8ee5450094d33", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "29ba0a20a26b92d96bdb0ff0f749379d7b332b2f7db55b0c1bd8ee5450094d33", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "29ba0a20a26b92d96bdb0ff0f749379d7b332b2f7db55b0c1bd8ee5450094d33", kill_on_drop: false }` [INFO] [stdout] 29ba0a20a26b92d96bdb0ff0f749379d7b332b2f7db55b0c1bd8ee5450094d33 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] b394a1dd9e4f49ca852111612c5bf550c70af0767027c2899c53eba3516cf0cd [INFO] running `Command { std: "docker" "start" "-a" "b394a1dd9e4f49ca852111612c5bf550c70af0767027c2899c53eba3516cf0cd", kill_on_drop: false }` [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Checking tinyvec_macros v0.1.0 [INFO] [stderr] Compiling version_check v0.1.5 [INFO] [stderr] Checking traitobject v0.1.0 [INFO] [stderr] Compiling serde_json v1.0.62 [INFO] [stderr] Checking percent-encoding v1.0.1 [INFO] [stderr] Compiling syn v1.0.60 [INFO] [stderr] Checking once_cell v1.5.2 [INFO] [stderr] Checking language-tags v0.2.2 [INFO] [stderr] Checking itoa v0.4.7 [INFO] [stderr] Checking typeable v0.1.2 [INFO] [stderr] Checking modifier v0.1.0 [INFO] [stderr] Checking base64 v0.9.3 [INFO] [stderr] Checking time v0.1.44 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking tinyvec v1.1.1 [INFO] [stderr] Checking unsafe-any v0.4.2 [INFO] [stderr] Checking typemap v0.3.3 [INFO] [stderr] Checking thread_local v1.1.3 [INFO] [stderr] Compiling unicase v1.4.2 [INFO] [stderr] Checking plugin v0.2.6 [INFO] [stderr] Checking regex v1.4.3 [INFO] [stderr] Checking log v0.3.9 [INFO] [stderr] Checking mime v0.2.6 [INFO] [stderr] Checking mustache v0.9.0 [INFO] [stderr] Checking unicode-normalization v0.1.17 [INFO] [stderr] Checking idna v0.1.5 [INFO] [stderr] Checking url v1.7.2 [INFO] [stderr] Compiling serde_derive v1.0.123 [INFO] [stderr] Checking hyper v0.10.16 [INFO] [stderr] Checking nickel v0.11.0 [INFO] [stderr] Checking numbers_to_letters2 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/control.rs:5:13 [INFO] [stdout] | [INFO] [stdout] 5 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/control/cardinals.rs:2:13 [INFO] [stdout] | [INFO] [stdout] 2 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/control/cardinals.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/cardinals.rs:2:13 [INFO] [stdout] | [INFO] [stdout] 2 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/cardinals.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/control.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let mut number_len = number_string.len(); [INFO] [stdout] | ----^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/control.rs:5:13 [INFO] [stdout] | [INFO] [stdout] 5 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/control/cardinals.rs:2:13 [INFO] [stdout] | [INFO] [stdout] 2 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/control/cardinals.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/cardinals.rs:2:13 [INFO] [stdout] | [INFO] [stdout] 2 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/cardinals.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | let mut result = String::from(""); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/control.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let mut number_len = number_string.len(); [INFO] [stdout] | ----^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 31.94s [INFO] running `Command { std: "docker" "inspect" "b394a1dd9e4f49ca852111612c5bf550c70af0767027c2899c53eba3516cf0cd", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b394a1dd9e4f49ca852111612c5bf550c70af0767027c2899c53eba3516cf0cd", kill_on_drop: false }` [INFO] [stdout] b394a1dd9e4f49ca852111612c5bf550c70af0767027c2899c53eba3516cf0cd