[INFO] fetching crate tack 0.1.1-alpha...
[INFO] building tack-0.1.1-alpha against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate tack 0.1.1-alpha into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate tack 0.1.1-alpha
[INFO] finished tweaking crates.io crate tack 0.1.1-alpha
[INFO] tweaked toml for crates.io crate tack 0.1.1-alpha written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tack 0.1.1-alpha on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a3f76fed2cbe45dcaeb9da96640686a9319905266d0babbda42c0edcd129546
[INFO] running `Command { std: "docker" "start" "-a" "3a3f76fed2cbe45dcaeb9da96640686a9319905266d0babbda42c0edcd129546", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a3f76fed2cbe45dcaeb9da96640686a9319905266d0babbda42c0edcd129546", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a3f76fed2cbe45dcaeb9da96640686a9319905266d0babbda42c0edcd129546", kill_on_drop: false }`
[INFO] [stdout] 3a3f76fed2cbe45dcaeb9da96640686a9319905266d0babbda42c0edcd129546
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e88d53ee2287f81e1c930ce4e4da9ead799258fcdd970df9b2192b708bcc0bd
[INFO] running `Command { std: "docker" "start" "-a" "6e88d53ee2287f81e1c930ce4e4da9ead799258fcdd970df9b2192b708bcc0bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling tack v0.1.1-alpha (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `valid_braces` is never used
[INFO] [stdout]   --> src/lib.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn valid_braces<'a>(s: &'a str) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "6e88d53ee2287f81e1c930ce4e4da9ead799258fcdd970df9b2192b708bcc0bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e88d53ee2287f81e1c930ce4e4da9ead799258fcdd970df9b2192b708bcc0bd", kill_on_drop: false }`
[INFO] [stdout] 6e88d53ee2287f81e1c930ce4e4da9ead799258fcdd970df9b2192b708bcc0bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90028bd1ccb26df5ae0afa087ac9a8be6515774af34b4431cad26c2cad7fcb46
[INFO] running `Command { std: "docker" "start" "-a" "90028bd1ccb26df5ae0afa087ac9a8be6515774af34b4431cad26c2cad7fcb46", kill_on_drop: false }`
[INFO] [stderr]    Compiling tack v0.1.1-alpha (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `valid_braces` is never used
[INFO] [stdout]   --> src/lib.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn valid_braces<'a>(s: &'a str) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "90028bd1ccb26df5ae0afa087ac9a8be6515774af34b4431cad26c2cad7fcb46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90028bd1ccb26df5ae0afa087ac9a8be6515774af34b4431cad26c2cad7fcb46", kill_on_drop: false }`
[INFO] [stdout] 90028bd1ccb26df5ae0afa087ac9a8be6515774af34b4431cad26c2cad7fcb46