[INFO] cloning repository https://github.com/udzura/fork-wait-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/udzura/fork-wait-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fudzura%2Ffork-wait-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fudzura%2Ffork-wait-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0758baa381c002d7c3f2044abc105db022a26601
[INFO] checking udzura/fork-wait-example against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fudzura%2Ffork-wait-example" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/udzura/fork-wait-example
[INFO] finished tweaking git repo https://github.com/udzura/fork-wait-example
[INFO] tweaked toml for git repo https://github.com/udzura/fork-wait-example written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/udzura/fork-wait-example on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/udzura/fork-wait-example 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af61b097288f6dadcc4d78acf99ee1db61544c77afc190d64645bd8f5b5bf6f4
[INFO] running `Command { std: "docker" "start" "-a" "af61b097288f6dadcc4d78acf99ee1db61544c77afc190d64645bd8f5b5bf6f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af61b097288f6dadcc4d78acf99ee1db61544c77afc190d64645bd8f5b5bf6f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af61b097288f6dadcc4d78acf99ee1db61544c77afc190d64645bd8f5b5bf6f4", kill_on_drop: false }`
[INFO] [stdout] af61b097288f6dadcc4d78acf99ee1db61544c77afc190d64645bd8f5b5bf6f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 17f48c7499ac9afcaf682aecb2f6bf0c3529bf683f61e40aa0b87678f541c6b7
[INFO] running `Command { std: "docker" "start" "-a" "17f48c7499ac9afcaf682aecb2f6bf0c3529bf683f61e40aa0b87678f541c6b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking minimum-container-example v0.1.0 (/opt/rustwide/workdir/minimum-container-example)
[INFO] [stderr]     Checking cloexec-example v0.1.0 (/opt/rustwide/workdir/cloexec-example)
[INFO] [stderr]     Checking fork-wait-example v0.1.0 (/opt/rustwide/workdir/worker-example)
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> minimum-container-example/src/main.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |         if let Err(e) = execvp(&cmd, &args.as_ref()) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> minimum-container-example/src/main.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |         if let Err(e) = execvp(&cmd, &args.as_ref()) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.05s
[INFO] running `Command { std: "docker" "inspect" "17f48c7499ac9afcaf682aecb2f6bf0c3529bf683f61e40aa0b87678f541c6b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17f48c7499ac9afcaf682aecb2f6bf0c3529bf683f61e40aa0b87678f541c6b7", kill_on_drop: false }`
[INFO] [stdout] 17f48c7499ac9afcaf682aecb2f6bf0c3529bf683f61e40aa0b87678f541c6b7