[INFO] fetching crate hugox 0.1.0...
[INFO] checking hugox-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate hugox 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate hugox 0.1.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hugox 0.1.0
[INFO] finished tweaking crates.io crate hugox 0.1.0
[INFO] tweaked toml for crates.io crate hugox 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate hugox 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v3.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 961fbdd2dd3ca31d8a9ff86319d27d955cd5d66dcb6d72d158253ebcea8208e4
[INFO] running `Command { std: "docker" "start" "-a" "961fbdd2dd3ca31d8a9ff86319d27d955cd5d66dcb6d72d158253ebcea8208e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "961fbdd2dd3ca31d8a9ff86319d27d955cd5d66dcb6d72d158253ebcea8208e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "961fbdd2dd3ca31d8a9ff86319d27d955cd5d66dcb6d72d158253ebcea8208e4", kill_on_drop: false }`
[INFO] [stdout] 961fbdd2dd3ca31d8a9ff86319d27d955cd5d66dcb6d72d158253ebcea8208e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25240bf5753787c4299e1a9fbecb682445b16a9963327a21c26dc95abad2b266
[INFO] running `Command { std: "docker" "start" "-a" "25240bf5753787c4299e1a9fbecb682445b16a9963327a21c26dc95abad2b266", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]    Compiling clap_derive v3.1.4
[INFO] [stderr]     Checking clap v3.1.6
[INFO] [stderr]     Checking hugox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_utils.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         std::fs::remove_file(file.as_ref());
[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] 28 |         let _ = std::fs::remove_file(file.as_ref());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_utils.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         std::fs::remove_file(file.as_ref());
[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] 28 |         let _ = std::fs::remove_file(file.as_ref());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.67s
[INFO] running `Command { std: "docker" "inspect" "25240bf5753787c4299e1a9fbecb682445b16a9963327a21c26dc95abad2b266", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25240bf5753787c4299e1a9fbecb682445b16a9963327a21c26dc95abad2b266", kill_on_drop: false }`
[INFO] [stdout] 25240bf5753787c4299e1a9fbecb682445b16a9963327a21c26dc95abad2b266
[INFO] checking hugox-0.1.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate hugox 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate hugox 0.1.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hugox 0.1.0
[INFO] finished tweaking crates.io crate hugox 0.1.0
[INFO] tweaked toml for crates.io crate hugox 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate hugox 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dcf03ed3ddcc05ddac3a95dca550867396519fb4a46e3c272c9516370f91ad0b
[INFO] running `Command { std: "docker" "start" "-a" "dcf03ed3ddcc05ddac3a95dca550867396519fb4a46e3c272c9516370f91ad0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dcf03ed3ddcc05ddac3a95dca550867396519fb4a46e3c272c9516370f91ad0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcf03ed3ddcc05ddac3a95dca550867396519fb4a46e3c272c9516370f91ad0b", kill_on_drop: false }`
[INFO] [stdout] dcf03ed3ddcc05ddac3a95dca550867396519fb4a46e3c272c9516370f91ad0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1914ab49af68973f7a741b28e76458ec6962cadcca4bb0a56bc2d4648444fbe0
[INFO] running `Command { std: "docker" "start" "-a" "1914ab49af68973f7a741b28e76458ec6962cadcca4bb0a56bc2d4648444fbe0", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]    Compiling clap_derive v3.1.4
[INFO] [stderr]     Checking clap v3.1.6
[INFO] [stderr]     Checking hugox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_utils.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         std::fs::remove_file(file.as_ref());
[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] 28 |         let _ = std::fs::remove_file(file.as_ref());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_utils.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         std::fs::remove_file(file.as_ref());
[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] 28 |         let _ = std::fs::remove_file(file.as_ref());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.50s
[INFO] running `Command { std: "docker" "inspect" "1914ab49af68973f7a741b28e76458ec6962cadcca4bb0a56bc2d4648444fbe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1914ab49af68973f7a741b28e76458ec6962cadcca4bb0a56bc2d4648444fbe0", kill_on_drop: false }`
[INFO] [stdout] 1914ab49af68973f7a741b28e76458ec6962cadcca4bb0a56bc2d4648444fbe0