[INFO] cloning repository https://github.com/Sonahit/rust-mem
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Sonahit/rust-mem" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSonahit%2Frust-mem", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSonahit%2Frust-mem'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 246f1827c7555bf75169f202308a21baf3acf620
[INFO] testing Sonahit/rust-mem against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSonahit%2Frust-mem" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Sonahit/rust-mem on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Sonahit/rust-mem
[INFO] finished tweaking git repo https://github.com/Sonahit/rust-mem
[INFO] tweaked toml for git repo https://github.com/Sonahit/rust-mem written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Sonahit/rust-mem already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d336df4a848403ca48649c3948f950f45ece51bef1e887d3c0a70b8fe21bb158
[INFO] running `Command { std: "docker" "start" "-a" "d336df4a848403ca48649c3948f950f45ece51bef1e887d3c0a70b8fe21bb158", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d336df4a848403ca48649c3948f950f45ece51bef1e887d3c0a70b8fe21bb158", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d336df4a848403ca48649c3948f950f45ece51bef1e887d3c0a70b8fe21bb158", kill_on_drop: false }`
[INFO] [stdout] d336df4a848403ca48649c3948f950f45ece51bef1e887d3c0a70b8fe21bb158
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b679fadad61f2bdb3d6e52f7ba02bf77c43509d561f49a4c257a2a166672460
[INFO] running `Command { std: "docker" "start" "-a" "6b679fadad61f2bdb3d6e52f7ba02bf77c43509d561f49a4c257a2a166672460", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling hook_protocol v0.1.0 (https://github.com/Sonahit/rust-hook#db05feeb)
[INFO] [stderr]    Compiling mem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `read_file_concurrent`
[INFO] [stdout]  --> src/read_file.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn read_file_concurrent(filename: &str) -> Result<Vec<u8>, std::io::Error> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `drain_reader`
[INFO] [stdout]   --> src/read_file.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn drain_reader(reader: &mut BufReader<File>, sender: Sender<u8>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.77s
[INFO] running `Command { std: "docker" "inspect" "6b679fadad61f2bdb3d6e52f7ba02bf77c43509d561f49a4c257a2a166672460", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b679fadad61f2bdb3d6e52f7ba02bf77c43509d561f49a4c257a2a166672460", kill_on_drop: false }`
[INFO] [stdout] 6b679fadad61f2bdb3d6e52f7ba02bf77c43509d561f49a4c257a2a166672460
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79436a0a13d28c894392ad21afba6943490bfb4522f24377d5040224344a6715
[INFO] running `Command { std: "docker" "start" "-a" "79436a0a13d28c894392ad21afba6943490bfb4522f24377d5040224344a6715", kill_on_drop: false }`
[INFO] [stderr]    Compiling mem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `read_file_concurrent`
[INFO] [stdout]  --> src/read_file.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn read_file_concurrent(filename: &str) -> Result<Vec<u8>, std::io::Error> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `drain_reader`
[INFO] [stdout]   --> src/read_file.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn drain_reader(reader: &mut BufReader<File>, sender: Sender<u8>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "79436a0a13d28c894392ad21afba6943490bfb4522f24377d5040224344a6715", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79436a0a13d28c894392ad21afba6943490bfb4522f24377d5040224344a6715", kill_on_drop: false }`
[INFO] [stdout] 79436a0a13d28c894392ad21afba6943490bfb4522f24377d5040224344a6715
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 685444dba6b68739681881b99e06eaa0e5d0d3f3370cd6624294a31c32de47e7
[INFO] running `Command { std: "docker" "start" "-a" "685444dba6b68739681881b99e06eaa0e5d0d3f3370cd6624294a31c32de47e7", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: function is never used: `read_file_concurrent`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/read_file.rs:8:8
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 8 | pub fn read_file_concurrent(filename: &str) -> Result<Vec<u8>, std::io::Error> {
[INFO] [stdout] 
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `drain_reader`
[INFO] [stderr]   --> src/read_file.rs:31:4
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn drain_reader(reader: &mut BufReader<File>, sender: Sender<u8>) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `mem` (bin "mem" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mem-4ece69b4b52f14eb)
[INFO] running `Command { std: "docker" "inspect" "685444dba6b68739681881b99e06eaa0e5d0d3f3370cd6624294a31c32de47e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "685444dba6b68739681881b99e06eaa0e5d0d3f3370cd6624294a31c32de47e7", kill_on_drop: false }`
[INFO] [stdout] 685444dba6b68739681881b99e06eaa0e5d0d3f3370cd6624294a31c32de47e7