[INFO] fetching crate subdown3 1.0.2...
[INFO] building subdown3-1.0.2 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate subdown3 1.0.2 into /workspace/builds/worker-2-tc2/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-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate subdown3 1.0.2 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b02765d0888b2b4771a31db104c752319fcb304998ec982afd2073426785bb4
[INFO] running `Command { std: "docker" "start" "-a" "1b02765d0888b2b4771a31db104c752319fcb304998ec982afd2073426785bb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b02765d0888b2b4771a31db104c752319fcb304998ec982afd2073426785bb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b02765d0888b2b4771a31db104c752319fcb304998ec982afd2073426785bb4", kill_on_drop: false }`
[INFO] [stdout] 1b02765d0888b2b4771a31db104c752319fcb304998ec982afd2073426785bb4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3540f60b4f8db8a961dc4aaccc974e0cdde9355104baced3a571a324c1eb12dc
[INFO] running `Command { std: "docker" "start" "-a" "3540f60b4f8db8a961dc4aaccc974e0cdde9355104baced3a571a324c1eb12dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.103
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.77
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling tokio v1.14.0
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling tracing-core v0.1.20
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling futures-sink v0.3.17
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling futures-io v0.3.17
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling http v0.2.5
[INFO] [stderr]    Compiling tracing v0.1.28
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling mio v0.7.13
[INFO] [stderr]    Compiling socket2 v0.4.2
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]    Compiling httpdate v1.0.1
[INFO] [stderr]    Compiling unicode-bidi v0.3.6
[INFO] [stderr]    Compiling tower-service v0.3.1
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling anyhow v1.0.44
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling flate2 v1.0.22
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling ipnet v2.3.1
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling http-body v0.4.3
[INFO] [stderr]    Compiling tokio-util v0.6.8
[INFO] [stderr]    Compiling async-compression v0.3.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling webpki v0.21.4
[INFO] [stderr]    Compiling sct v0.6.1
[INFO] [stderr]    Compiling rustls v0.19.1
[INFO] [stderr]    Compiling webpki-roots v0.21.1
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling tokio-rustls v0.22.0
[INFO] [stderr]    Compiling h2 v0.3.4
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling hyper v0.14.13
[INFO] [stderr]    Compiling hyper-rustls v0.22.1
[INFO] [stderr]    Compiling reqwest v0.11.4
[INFO] [stderr]    Compiling 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 39.24s
[INFO] running `Command { std: "docker" "inspect" "3540f60b4f8db8a961dc4aaccc974e0cdde9355104baced3a571a324c1eb12dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3540f60b4f8db8a961dc4aaccc974e0cdde9355104baced3a571a324c1eb12dc", kill_on_drop: false }`
[INFO] [stdout] 3540f60b4f8db8a961dc4aaccc974e0cdde9355104baced3a571a324c1eb12dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6fb9436e2045b26db545c955294fded5a5f7f9dfd7e5876906166e0e8ffab4e7
[INFO] running `Command { std: "docker" "start" "-a" "6fb9436e2045b26db545c955294fded5a5f7f9dfd7e5876906166e0e8ffab4e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.84s
[INFO] running `Command { std: "docker" "inspect" "6fb9436e2045b26db545c955294fded5a5f7f9dfd7e5876906166e0e8ffab4e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fb9436e2045b26db545c955294fded5a5f7f9dfd7e5876906166e0e8ffab4e7", kill_on_drop: false }`
[INFO] [stdout] 6fb9436e2045b26db545c955294fded5a5f7f9dfd7e5876906166e0e8ffab4e7