[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] testing vimhash/number-to-letter-converter against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvimhash%2Fnumber-to-letter-converter" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/vimhash/number-to-letter-converter on toolchain 722e1797249a965b6335aebd65d777f917e498f1 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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-8/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" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 5188597a83c5c6dd7faf77d317e286f25602aa6532403b4489f6034a3a7fbb67 [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" "5188597a83c5c6dd7faf77d317e286f25602aa6532403b4489f6034a3a7fbb67", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "5188597a83c5c6dd7faf77d317e286f25602aa6532403b4489f6034a3a7fbb67", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5188597a83c5c6dd7faf77d317e286f25602aa6532403b4489f6034a3a7fbb67", kill_on_drop: false }` [INFO] [stdout] 5188597a83c5c6dd7faf77d317e286f25602aa6532403b4489f6034a3a7fbb67 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 2b977c85c377393e15f195e63d140a9f82ee576fa4a4fabbb02d1120651cfe9b [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" "2b977c85c377393e15f195e63d140a9f82ee576fa4a4fabbb02d1120651cfe9b", kill_on_drop: false }` [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling cfg-if v1.0.0 [INFO] [stderr] Compiling libc v0.2.86 [INFO] [stderr] Compiling serde v1.0.123 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Compiling traitobject v0.1.0 [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Compiling httparse v1.3.5 [INFO] [stderr] Compiling once_cell v1.5.2 [INFO] [stderr] Compiling byteorder v1.4.2 [INFO] [stderr] Compiling safemem v0.3.3 [INFO] [stderr] Compiling percent-encoding v1.0.1 [INFO] [stderr] Compiling serde_json v1.0.62 [INFO] [stderr] Compiling syn v1.0.60 [INFO] [stderr] Compiling language-tags v0.2.2 [INFO] [stderr] Compiling typeable v0.1.2 [INFO] [stderr] Compiling regex-syntax v0.6.22 [INFO] [stderr] Compiling itoa v0.4.7 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling modifier v0.1.0 [INFO] [stderr] Compiling groupable v0.2.0 [INFO] [stderr] Compiling tinyvec v1.1.1 [INFO] [stderr] Compiling unicode-bidi v0.3.4 [INFO] [stderr] Compiling unsafe-any v0.4.2 [INFO] [stderr] Compiling thread_local v1.1.3 [INFO] [stderr] Compiling typemap v0.3.3 [INFO] [stderr] Compiling quote v1.0.9 [INFO] [stderr] Compiling base64 v0.9.3 [INFO] [stderr] Compiling plugin v0.2.6 [INFO] [stderr] Compiling log v0.3.9 [INFO] [stderr] Compiling aho-corasick v0.7.15 [INFO] [stderr] Compiling mime v0.2.6 [INFO] [stderr] Compiling unicode-normalization v0.1.17 [INFO] [stderr] Compiling num_cpus v1.13.0 [INFO] [stderr] Compiling time v0.1.44 [INFO] [stderr] Compiling regex v1.4.3 [INFO] [stderr] Compiling idna v0.1.5 [INFO] [stderr] Compiling url v1.7.2 [INFO] [stderr] Compiling serde_derive v1.0.123 [INFO] [stderr] Compiling hyper v0.10.16 [INFO] [stderr] Compiling mustache v0.9.0 [INFO] [stderr] Compiling nickel v0.11.0 [INFO] [stderr] Compiling 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/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: 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: 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] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 03s [INFO] running `Command { std: "docker" "inspect" "2b977c85c377393e15f195e63d140a9f82ee576fa4a4fabbb02d1120651cfe9b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2b977c85c377393e15f195e63d140a9f82ee576fa4a4fabbb02d1120651cfe9b", kill_on_drop: false }` [INFO] [stdout] 2b977c85c377393e15f195e63d140a9f82ee576fa4a4fabbb02d1120651cfe9b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--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] d7c370133fead090ffebb2f733cd86e930500b6e961f1d5a5509d8ca305824c7 [INFO] running `Command { std: "docker" "start" "-a" "d7c370133fead090ffebb2f733cd86e930500b6e961f1d5a5509d8ca305824c7", kill_on_drop: false }` [INFO] [stderr] Compiling 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/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: 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: 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] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.82s [INFO] running `Command { std: "docker" "inspect" "d7c370133fead090ffebb2f733cd86e930500b6e961f1d5a5509d8ca305824c7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d7c370133fead090ffebb2f733cd86e930500b6e961f1d5a5509d8ca305824c7", kill_on_drop: false }` [INFO] [stdout] d7c370133fead090ffebb2f733cd86e930500b6e961f1d5a5509d8ca305824c7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 9541d2691d5e77efaf2a60e3f1d0f12ecf9c2f6864bbb2fd8d185b6219adb426 [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" "9541d2691d5e77efaf2a60e3f1d0f12ecf9c2f6864bbb2fd8d185b6219adb426", 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] [stderr] warning: value assigned to `result` is never read [INFO] [stderr] --> src/control.rs:5:13 [INFO] [stderr] | [INFO] [stderr] 5 | let mut result = String::from(""); [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: value assigned to `result` is never read [INFO] [stderr] --> src/cardinals.rs:2:13 [INFO] [stderr] | [INFO] [stderr] 2 | let mut result = String::from(""); [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: value assigned to `result` is never read [INFO] [stderr] --> src/cardinals.rs:20:13 [INFO] [stderr] | [INFO] [stderr] 20 | let mut result = String::from(""); [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: value assigned to `result` is never read [INFO] [stderr] --> src/control/cardinals.rs:2:13 [INFO] [stderr] | [INFO] [stderr] 2 | let mut result = String::from(""); [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: value assigned to `result` is never read [INFO] [stderr] --> src/control/cardinals.rs:20:13 [INFO] [stderr] | [INFO] [stderr] 20 | let mut result = String::from(""); [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/control.rs:9:9 [INFO] [stderr] | [INFO] [stderr] 9 | let mut number_len = number_string.len(); [INFO] [stderr] | ----^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `numbers_to_letters2` (bin "numbers_to_letters2" test) generated 6 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.16s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/numbers_to_letters2-7fe1ed38d5f4f0cd) [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test tests::test_calc ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "9541d2691d5e77efaf2a60e3f1d0f12ecf9c2f6864bbb2fd8d185b6219adb426", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9541d2691d5e77efaf2a60e3f1d0f12ecf9c2f6864bbb2fd8d185b6219adb426", kill_on_drop: false }` [INFO] [stdout] 9541d2691d5e77efaf2a60e3f1d0f12ecf9c2f6864bbb2fd8d185b6219adb426