[INFO] cloning repository https://github.com/kazukiyoshida/how-linux-works
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kazukiyoshida/how-linux-works" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukiyoshida%2Fhow-linux-works", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukiyoshida%2Fhow-linux-works'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b90f18d1783c3f4a82d40ee5bb44bf4ff7aed3ca
[INFO] testing kazukiyoshida/how-linux-works against master#ec6f9a5b4413f74386267ef8efc93712c2ce6db6 for pr-155739-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukiyoshida%2Fhow-linux-works" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kazukiyoshida/how-linux-works
[INFO] finished tweaking git repo https://github.com/kazukiyoshida/how-linux-works
[INFO] tweaked toml for git repo https://github.com/kazukiyoshida/how-linux-works written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kazukiyoshida/how-linux-works on toolchain ec6f9a5b4413f74386267ef8efc93712c2ce6db6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kazukiyoshida/how-linux-works 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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.66
[INFO] [stderr]   Downloaded nix v0.19.1
[INFO] [stderr]   Downloaded libc v0.2.86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5acac6e3e79d50d07dea91152bfe5bf0374f0aee1f8595d43b942a224a8a4e83
[INFO] running `Command { std: "docker" "start" "-a" "5acac6e3e79d50d07dea91152bfe5bf0374f0aee1f8595d43b942a224a8a4e83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5acac6e3e79d50d07dea91152bfe5bf0374f0aee1f8595d43b942a224a8a4e83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5acac6e3e79d50d07dea91152bfe5bf0374f0aee1f8595d43b942a224a8a4e83", kill_on_drop: false }`
[INFO] [stdout] 5acac6e3e79d50d07dea91152bfe5bf0374f0aee1f8595d43b942a224a8a4e83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a71b69c4c114bb3216645879c4c74e291be44223f67c338db00704438ebdfd73
[INFO] running `Command { std: "docker" "start" "-a" "a71b69c4c114bb3216645879c4c74e291be44223f67c338db00704438ebdfd73", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling nix v0.19.1
[INFO] [stderr]    Compiling how-linux-works v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/bin/fork-and-exec.rs:24:54
[INFO] [stdout]    |
[INFO] [stdout] 24 |             execv(&cmd, &[cmd.clone(), msg]).unwrap();
[INFO] [stdout]    |             -----------------------------------------^ unreachable expression
[INFO] [stdout]    |             |
[INFO] [stdout]    |             any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]   --> src/bin/fork-and-exec.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |             execv(&cmd, &[cmd.clone(), msg]).unwrap();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.88s
[INFO] running `Command { std: "docker" "inspect" "a71b69c4c114bb3216645879c4c74e291be44223f67c338db00704438ebdfd73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a71b69c4c114bb3216645879c4c74e291be44223f67c338db00704438ebdfd73", kill_on_drop: false }`
[INFO] [stdout] a71b69c4c114bb3216645879c4c74e291be44223f67c338db00704438ebdfd73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4ad2a989ab9ef69ac5dfa0b651fb066129b05f12121159f1021c7c6d08ac36f
[INFO] running `Command { std: "docker" "start" "-a" "c4ad2a989ab9ef69ac5dfa0b651fb066129b05f12121159f1021c7c6d08ac36f", kill_on_drop: false }`
[INFO] [stderr]    Compiling how-linux-works v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/bin/fork-and-exec.rs:24:54
[INFO] [stdout]    |
[INFO] [stdout] 24 |             execv(&cmd, &[cmd.clone(), msg]).unwrap();
[INFO] [stdout]    |             -----------------------------------------^ unreachable expression
[INFO] [stdout]    |             |
[INFO] [stdout]    |             any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]   --> src/bin/fork-and-exec.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |             execv(&cmd, &[cmd.clone(), msg]).unwrap();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "c4ad2a989ab9ef69ac5dfa0b651fb066129b05f12121159f1021c7c6d08ac36f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4ad2a989ab9ef69ac5dfa0b651fb066129b05f12121159f1021c7c6d08ac36f", kill_on_drop: false }`
[INFO] [stdout] c4ad2a989ab9ef69ac5dfa0b651fb066129b05f12121159f1021c7c6d08ac36f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 13c75401f4f9781c5f8631b17536aca824c28600e826467291ec3624086e0773
[INFO] running `Command { std: "docker" "start" "-a" "13c75401f4f9781c5f8631b17536aca824c28600e826467291ec3624086e0773", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/bin/fork-and-exec.rs:24:54
[INFO] [stderr]    |
[INFO] [stderr] 24 |             execv(&cmd, &[cmd.clone(), msg]).unwrap();
[INFO] [stderr]    |             -----------------------------------------^ unreachable expression
[INFO] [stderr]    |             |
[INFO] [stderr]    |             any code following this expression is unreachable
[INFO] [stderr]    |
[INFO] [stderr] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stderr]   --> src/bin/fork-and-exec.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |             execv(&cmd, &[cmd.clone(), msg]).unwrap();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `how-linux-works` (bin "fork-and-exec" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/bin/fork.rs (/opt/rustwide/target/debug/deps/fork-7bb4b4ebb75b26bc)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/fork-and-exec.rs (/opt/rustwide/target/debug/deps/fork_and_exec-96776f4171c4ab00)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "13c75401f4f9781c5f8631b17536aca824c28600e826467291ec3624086e0773", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13c75401f4f9781c5f8631b17536aca824c28600e826467291ec3624086e0773", kill_on_drop: false }`
[INFO] [stdout] 13c75401f4f9781c5f8631b17536aca824c28600e826467291ec3624086e0773
