[INFO] cloning repository https://github.com/amscotti/rust_balanced_brackets [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amscotti/rust_balanced_brackets" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famscotti%2Frust_balanced_brackets", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famscotti%2Frust_balanced_brackets'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 926a2039b3b6981dc9f05a2a538f44fadc9c4778 [INFO] checking amscotti/rust_balanced_brackets against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famscotti%2Frust_balanced_brackets" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/amscotti/rust_balanced_brackets [INFO] finished tweaking git repo https://github.com/amscotti/rust_balanced_brackets [INFO] tweaked toml for git repo https://github.com/amscotti/rust_balanced_brackets written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/amscotti/rust_balanced_brackets on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/amscotti/rust_balanced_brackets 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b97605045ae1b643ecd4ff39de7781eb5c633d69a31a5714d50b3192eac7dc2f [INFO] running `Command { std: "docker" "start" "-a" "b97605045ae1b643ecd4ff39de7781eb5c633d69a31a5714d50b3192eac7dc2f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b97605045ae1b643ecd4ff39de7781eb5c633d69a31a5714d50b3192eac7dc2f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b97605045ae1b643ecd4ff39de7781eb5c633d69a31a5714d50b3192eac7dc2f", kill_on_drop: false }` [INFO] [stdout] b97605045ae1b643ecd4ff39de7781eb5c633d69a31a5714d50b3192eac7dc2f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b99aa8984f2e2f0389bfc8489c0c1568bf95f6ca1f49d12bc4363f9821691e56 [INFO] running `Command { std: "docker" "start" "-a" "b99aa8984f2e2f0389bfc8489c0c1568bf95f6ca1f49d12bc4363f9821691e56", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.132 [INFO] [stderr] Checking once_cell v1.13.1 [INFO] [stderr] Compiling crossbeam-utils v0.8.11 [INFO] [stderr] Compiling crossbeam-epoch v0.9.10 [INFO] [stderr] Compiling rayon-core v1.9.3 [INFO] [stderr] Compiling indexmap v1.9.1 [INFO] [stderr] Compiling rayon v1.5.3 [INFO] [stderr] Checking os_str_bytes v6.3.0 [INFO] [stderr] Checking either v1.8.0 [INFO] [stderr] Checking textwrap v0.15.0 [INFO] [stderr] Checking termcolor v1.1.3 [INFO] [stderr] Compiling proc-macro-error-attr v1.0.4 [INFO] [stderr] Checking clap_lex v0.2.4 [INFO] [stderr] Compiling proc-macro-error v1.0.4 [INFO] [stderr] Checking crossbeam-channel v0.5.6 [INFO] [stderr] Checking num_cpus v1.13.1 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Compiling clap_derive v3.2.18 [INFO] [stderr] Checking crossbeam-deque v0.8.2 [INFO] [stderr] Checking clap v3.2.19 [INFO] [stderr] Checking rust_balanced_brackets v0.1.1 (/opt/rustwide/workdir) [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/lib.rs:36:54 [INFO] [stdout] | [INFO] [stdout] 36 | fn from_str(s: &str) -> Result { [INFO] [stdout] | ______________________________________________________^ [INFO] [stdout] 37 | | Ok(BracketSequence( [INFO] [stdout] 38 | | s.chars().map(|c| c.into()).collect::>(), [INFO] [stdout] 39 | | )) [INFO] [stdout] 40 | | } [INFO] [stdout] | |_____^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/lib.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | / Ok(BracketSequence( [INFO] [stdout] 38 | | s.chars().map(|c| c.into()).collect::>(), [INFO] [stdout] 39 | | )) [INFO] [stdout] | |__________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/lib.rs:70:11 [INFO] [stdout] | [INFO] [stdout] 70 | match input.parse::() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/lib.rs:36:54 [INFO] [stdout] | [INFO] [stdout] 36 | fn from_str(s: &str) -> Result { [INFO] [stdout] | ______________________________________________________^ [INFO] [stdout] 37 | | Ok(BracketSequence( [INFO] [stdout] 38 | | s.chars().map(|c| c.into()).collect::>(), [INFO] [stdout] 39 | | )) [INFO] [stdout] 40 | | } [INFO] [stdout] | |_____^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/lib.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | / Ok(BracketSequence( [INFO] [stdout] 38 | | s.chars().map(|c| c.into()).collect::>(), [INFO] [stdout] 39 | | )) [INFO] [stdout] | |__________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/lib.rs:70:11 [INFO] [stdout] | [INFO] [stdout] 70 | match input.parse::() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rust_balanced_brackets` (lib) due to 3 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `rust_balanced_brackets` (lib test) due to 3 previous errors [INFO] running `Command { std: "docker" "inspect" "b99aa8984f2e2f0389bfc8489c0c1568bf95f6ca1f49d12bc4363f9821691e56", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b99aa8984f2e2f0389bfc8489c0c1568bf95f6ca1f49d12bc4363f9821691e56", kill_on_drop: false }` [INFO] [stdout] b99aa8984f2e2f0389bfc8489c0c1568bf95f6ca1f49d12bc4363f9821691e56