[INFO] fetching crate subdown3 1.0.2...
[INFO] checking subdown3-1.0.2 against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] extracting crate subdown3 1.0.2 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate subdown3 1.0.2
[INFO] finished tweaking crates.io crate subdown3 1.0.2
[INFO] tweaked toml for crates.io crate subdown3 1.0.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate subdown3 1.0.2 on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate subdown3 1.0.2 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v1.0.29
[INFO] [stderr]   Downloaded winreg v0.7.0
[INFO] [stderr]   Downloaded serde_urlencoded v0.7.0
[INFO] [stderr]   Downloaded sct v0.6.1
[INFO] [stderr]   Downloaded httparse v1.5.1
[INFO] [stderr]   Downloaded proc-macro2 v1.0.29
[INFO] [stderr]   Downloaded flate2 v1.0.22
[INFO] [stderr]   Downloaded mio v0.7.13
[INFO] [stderr]   Downloaded async-compression v0.3.8
[INFO] [stderr]   Downloaded tracing-core v0.1.20
[INFO] [stderr]   Downloaded tinyvec v1.5.0
[INFO] [stderr]   Downloaded webpki v0.21.4
[INFO] [stderr]   Downloaded rustls v0.19.1
[INFO] [stderr]   Downloaded webpki-roots v0.21.1
[INFO] [stderr]   Downloaded syn v1.0.77
[INFO] [stderr]   Downloaded tracing v0.1.28
[INFO] [stderr]   Downloaded reqwest v0.11.4
[INFO] [stderr]   Downloaded hyper-rustls v0.22.1
[INFO] [stderr]   Downloaded libc v0.2.103
[INFO] [stderr]   Downloaded tokio-rustls v0.22.0
[INFO] [stderr]   Downloaded once_cell v1.8.0
[INFO] [stderr]   Downloaded thiserror v1.0.29
[INFO] [stderr]   Downloaded tokio v1.14.0
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2d78bc464d0d948415f3cf1027453ee57dcbf643ed9766aabcf458fd0e1e5f21
[INFO] running `Command { std: "docker" "start" "-a" "2d78bc464d0d948415f3cf1027453ee57dcbf643ed9766aabcf458fd0e1e5f21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d78bc464d0d948415f3cf1027453ee57dcbf643ed9766aabcf458fd0e1e5f21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d78bc464d0d948415f3cf1027453ee57dcbf643ed9766aabcf458fd0e1e5f21", kill_on_drop: false }`
[INFO] [stdout] 2d78bc464d0d948415f3cf1027453ee57dcbf643ed9766aabcf458fd0e1e5f21
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68ac6cafdc3d1775fabcf9739a4ca57ff2cc5424494beb6777c50caeae38e422
[INFO] running `Command { std: "docker" "start" "-a" "68ac6cafdc3d1775fabcf9739a4ca57ff2cc5424494beb6777c50caeae38e422", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.103
[INFO] [stderr]    Compiling syn v1.0.77
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling tokio v1.14.0
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]     Checking tracing-core v0.1.20
[INFO] [stderr]     Checking http v0.2.5
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking futures-sink v0.3.17
[INFO] [stderr]     Checking futures-io v0.3.17
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]     Checking tinyvec v1.5.0
[INFO] [stderr]     Checking httpdate v1.0.1
[INFO] [stderr]    Compiling anyhow v1.0.44
[INFO] [stderr]     Checking tracing v0.1.28
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking http-body v0.4.3
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]     Checking tokio-util v0.6.8
[INFO] [stderr]     Checking async-compression v0.3.8
[INFO] [stderr]     Checking webpki v0.21.4
[INFO] [stderr]     Checking sct v0.6.1
[INFO] [stderr]     Checking rustls v0.19.1
[INFO] [stderr]     Checking webpki-roots v0.21.1
[INFO] [stderr]     Checking thiserror v1.0.29
[INFO] [stderr]     Checking tokio-rustls v0.22.0
[INFO] [stderr]     Checking h2 v0.3.4
[INFO] [stderr]     Checking hyper v0.14.13
[INFO] [stderr]     Checking serde_json v1.0.68
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking hyper-rustls v0.22.1
[INFO] [stderr]     Checking reqwest v0.11.4
[INFO] [stderr]     Checking subdown3 v1.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]    --> src/main.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |         format!("{}: {}", resp.status(), resp.url());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 146 |         let _ = format!("{}: {}", resp.status(), resp.url());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]    --> src/main.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |         format!("{}: {}", resp.status(), resp.url());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 146 |         let _ = format!("{}: {}", resp.status(), resp.url());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.90s
[INFO] running `Command { std: "docker" "inspect" "68ac6cafdc3d1775fabcf9739a4ca57ff2cc5424494beb6777c50caeae38e422", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68ac6cafdc3d1775fabcf9739a4ca57ff2cc5424494beb6777c50caeae38e422", kill_on_drop: false }`
[INFO] [stdout] 68ac6cafdc3d1775fabcf9739a4ca57ff2cc5424494beb6777c50caeae38e422