[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 beta-2021-09-08 for beta-1.56-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvimhash%2Fnumber-to-letter-converter" "/workspace/builds/worker-33/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-33/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/vimhash/number-to-letter-converter on toolchain beta-2021-09-08 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-33/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" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] afb23f81075f6687a498e087b13d741ec91f7b537e3b5b0de24e266baf096494 [INFO] running `Command { std: "docker" "start" "-a" "afb23f81075f6687a498e087b13d741ec91f7b537e3b5b0de24e266baf096494", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "afb23f81075f6687a498e087b13d741ec91f7b537e3b5b0de24e266baf096494", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "afb23f81075f6687a498e087b13d741ec91f7b537e3b5b0de24e266baf096494", kill_on_drop: false }` [INFO] [stdout] afb23f81075f6687a498e087b13d741ec91f7b537e3b5b0de24e266baf096494 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7375cddba2ca6da203fa071f8899e511cc38b5e6900d0ab294bca53cc751d0e8 [INFO] running `Command { std: "docker" "start" "-a" "7375cddba2ca6da203fa071f8899e511cc38b5e6900d0ab294bca53cc751d0e8", kill_on_drop: false }` [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling tinyvec_macros v0.1.0 [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 matches v0.1.8 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Compiling traitobject v0.1.0 [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling version_check v0.1.5 [INFO] [stderr] Compiling httparse v1.3.5 [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling once_cell v1.5.2 [INFO] [stderr] Compiling serde_json v1.0.62 [INFO] [stderr] Compiling syn v1.0.60 [INFO] [stderr] Compiling byteorder v1.4.2 [INFO] [stderr] Compiling percent-encoding v1.0.1 [INFO] [stderr] Compiling safemem v0.3.3 [INFO] [stderr] Compiling regex-syntax v0.6.22 [INFO] [stderr] Compiling language-tags v0.2.2 [INFO] [stderr] Compiling itoa v0.4.7 [INFO] [stderr] Compiling typeable v0.1.2 [INFO] [stderr] Compiling serde_derive v1.0.123 [INFO] [stderr] Compiling groupable v0.2.0 [INFO] [stderr] Compiling modifier v0.1.0 [INFO] [stderr] Compiling lazy_static v1.4.0 [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 base64 v0.9.3 [INFO] [stderr] Compiling unicase v1.4.2 [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 quote v1.0.9 [INFO] [stderr] Compiling time v0.1.44 [INFO] [stderr] Compiling num_cpus v1.13.0 [INFO] [stderr] Compiling unicode-normalization v0.1.17 [INFO] [stderr] Compiling idna v0.1.5 [INFO] [stderr] Compiling regex v1.4.3 [INFO] [stderr] Compiling url v1.7.2 [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/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] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 10.10s [INFO] running `Command { std: "docker" "inspect" "7375cddba2ca6da203fa071f8899e511cc38b5e6900d0ab294bca53cc751d0e8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7375cddba2ca6da203fa071f8899e511cc38b5e6900d0ab294bca53cc751d0e8", kill_on_drop: false }` [INFO] [stdout] 7375cddba2ca6da203fa071f8899e511cc38b5e6900d0ab294bca53cc751d0e8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 55d7943a0127259caf390078e31c0d8f706b1c5d36c916e95891b793313e92bb [INFO] running `Command { std: "docker" "start" "-a" "55d7943a0127259caf390078e31c0d8f706b1c5d36c916e95891b793313e92bb", 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/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] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.73s [INFO] running `Command { std: "docker" "inspect" "55d7943a0127259caf390078e31c0d8f706b1c5d36c916e95891b793313e92bb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "55d7943a0127259caf390078e31c0d8f706b1c5d36c916e95891b793313e92bb", kill_on_drop: false }` [INFO] [stdout] 55d7943a0127259caf390078e31c0d8f706b1c5d36c916e95891b793313e92bb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] f096de74aac55aff4a64ce08064f97dc3cc5a92e8dad4fa5b6bf6ed97e3ed81e [INFO] running `Command { std: "docker" "start" "-a" "f096de74aac55aff4a64ce08064f97dc3cc5a92e8dad4fa5b6bf6ed97e3ed81e", kill_on_drop: false }` [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/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: 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: 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 0.03s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/numbers_to_letters2-0c60a1a042a4762c) [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" "f096de74aac55aff4a64ce08064f97dc3cc5a92e8dad4fa5b6bf6ed97e3ed81e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f096de74aac55aff4a64ce08064f97dc3cc5a92e8dad4fa5b6bf6ed97e3ed81e", kill_on_drop: false }` [INFO] [stdout] f096de74aac55aff4a64ce08064f97dc3cc5a92e8dad4fa5b6bf6ed97e3ed81e