[INFO] fetching crate zb 0.1.0...
[INFO] checking zb-0.1.0 against master#e0ba2d038db3afa968e13075b1d6eabd24339708 for pr-112988
[INFO] extracting crate zb 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate zb 0.1.0 on toolchain e0ba2d038db3afa968e13075b1d6eabd24339708
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e0ba2d038db3afa968e13075b1d6eabd24339708" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zb 0.1.0
[INFO] finished tweaking crates.io crate zb 0.1.0
[INFO] tweaked toml for crates.io crate zb 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate zb 0.1.0 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" "+e0ba2d038db3afa968e13075b1d6eabd24339708" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+e0ba2d038db3afa968e13075b1d6eabd24339708" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c6801cfd95f414c8fc94fdf78e471a3a0e9223d27527c48657b85bda677c79d
[INFO] running `Command { std: "docker" "start" "-a" "7c6801cfd95f414c8fc94fdf78e471a3a0e9223d27527c48657b85bda677c79d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c6801cfd95f414c8fc94fdf78e471a3a0e9223d27527c48657b85bda677c79d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c6801cfd95f414c8fc94fdf78e471a3a0e9223d27527c48657b85bda677c79d", kill_on_drop: false }`
[INFO] [stdout] 7c6801cfd95f414c8fc94fdf78e471a3a0e9223d27527c48657b85bda677c79d
[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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+e0ba2d038db3afa968e13075b1d6eabd24339708" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 870fcdf493c33833ff0af956acd0fd7789c5a57c7786eefa3b3e1ee5b82016f9
[INFO] running `Command { std: "docker" "start" "-a" "870fcdf493c33833ff0af956acd0fd7789c5a57c7786eefa3b3e1ee5b82016f9", kill_on_drop: false }`
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[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling actix-macros v0.2.3
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[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling clap_derive v3.1.7
[INFO] [stderr]     Checking tracing v0.1.34
[INFO] [stderr]     Checking tokio-util v0.7.1
[INFO] [stderr]     Checking actix-server v2.1.1
[INFO] [stderr]     Checking comrak v0.10.1
[INFO] [stderr]     Checking actix-codec v0.5.0
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]     Checking serde_indextree v0.2.0
[INFO] [stderr]     Checking h2 v0.3.13
[INFO] [stderr]     Checking clap v3.1.12
[INFO] [stderr]     Checking orgize v0.9.0
[INFO] [stderr]     Checking zstd v0.10.0+zstd.1.5.2
[INFO] [stderr]     Checking actix-http v3.0.4
[INFO] [stderr]     Checking zip v0.6.2
[INFO] [stderr]     Checking actix-web v4.0.1
[INFO] [stderr]     Checking zb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:75:21
[INFO] [stdout]    |
[INFO] [stdout] 75 |                     file.read_to_string(&mut contents);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |                     let _ = file.read_to_string(&mut contents);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:96:21
[INFO] [stdout]    |
[INFO] [stdout] 96 |                     file.read_to_end(&mut contents);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 96 |                     let _ = file.read_to_end(&mut contents);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:75:21
[INFO] [stdout]    |
[INFO] [stdout] 75 |                     file.read_to_string(&mut contents);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |                     let _ = file.read_to_string(&mut contents);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:96:21
[INFO] [stdout]    |
[INFO] [stdout] 96 |                     file.read_to_end(&mut contents);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 96 |                     let _ = file.read_to_end(&mut contents);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.61s
[INFO] running `Command { std: "docker" "inspect" "870fcdf493c33833ff0af956acd0fd7789c5a57c7786eefa3b3e1ee5b82016f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "870fcdf493c33833ff0af956acd0fd7789c5a57c7786eefa3b3e1ee5b82016f9", kill_on_drop: false }`
[INFO] [stdout] 870fcdf493c33833ff0af956acd0fd7789c5a57c7786eefa3b3e1ee5b82016f9