[INFO] cloning repository https://github.com/ThimoPischel/butter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ThimoPischel/butter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThimoPischel%2Fbutter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThimoPischel%2Fbutter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38179f90697131ab615e01df1eeb7682511d0c37
[INFO] checking ThimoPischel/butter against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThimoPischel%2Fbutter" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ThimoPischel/butter 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 git repo https://github.com/ThimoPischel/butter
[INFO] finished tweaking git repo https://github.com/ThimoPischel/butter
[INFO] tweaked toml for git repo https://github.com/ThimoPischel/butter written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ThimoPischel/butter 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded chronoutil v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] edbb3ea08dfffd42b91563a27c75dd3763dd6de144cc19cde219980239f57eb2
[INFO] running `Command { std: "docker" "start" "-a" "edbb3ea08dfffd42b91563a27c75dd3763dd6de144cc19cde219980239f57eb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "edbb3ea08dfffd42b91563a27c75dd3763dd6de144cc19cde219980239f57eb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edbb3ea08dfffd42b91563a27c75dd3763dd6de144cc19cde219980239f57eb2", kill_on_drop: false }`
[INFO] [stdout] edbb3ea08dfffd42b91563a27c75dd3763dd6de144cc19cde219980239f57eb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 687fc956d95af6647d6602e5bb38b31d7ea3fbcc53adf896988c2646910ac465
[INFO] running `Command { std: "docker" "start" "-a" "687fc956d95af6647d6602e5bb38b31d7ea3fbcc53adf896988c2646910ac465", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]    Compiling tokio v1.20.1
[INFO] [stderr]     Checking iana-time-zone v0.1.46
[INFO] [stderr]    Compiling anyhow v1.0.64
[INFO] [stderr]    Compiling serde_json v1.0.83
[INFO] [stderr]     Checking once_cell v1.13.1
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking parking_lot_core v0.9.3
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking mio v0.8.4
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking chrono v0.4.22
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking chronoutil v0.2.3
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.144
[INFO] [stderr]     Checking butter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `size` and `mime_type` are never read
[INFO] [stdout]   --> src/helper.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct RcloneLsjsonItem {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub size: i64,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 20 |     #[serde(rename = "MimeType")]
[INFO] [stdout] 21 |     pub mime_type: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `size` and `mime_type` are never read
[INFO] [stdout]   --> src/helper.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct RcloneLsjsonItem {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub size: i64,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 20 |     #[serde(rename = "MimeType")]
[INFO] [stdout] 21 |     pub mime_type: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.97s
[INFO] running `Command { std: "docker" "inspect" "687fc956d95af6647d6602e5bb38b31d7ea3fbcc53adf896988c2646910ac465", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "687fc956d95af6647d6602e5bb38b31d7ea3fbcc53adf896988c2646910ac465", kill_on_drop: false }`
[INFO] [stdout] 687fc956d95af6647d6602e5bb38b31d7ea3fbcc53adf896988c2646910ac465
[INFO] checking ThimoPischel/butter against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThimoPischel%2Fbutter" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ThimoPischel/butter 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 git repo https://github.com/ThimoPischel/butter
[INFO] finished tweaking git repo https://github.com/ThimoPischel/butter
[INFO] tweaked toml for git repo https://github.com/ThimoPischel/butter written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ThimoPischel/butter 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] 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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3eb9d56498772c1b3cb7c4c36da31ae0a91a47ee03adf6a11f13bc879ac82fa
[INFO] running `Command { std: "docker" "start" "-a" "e3eb9d56498772c1b3cb7c4c36da31ae0a91a47ee03adf6a11f13bc879ac82fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3eb9d56498772c1b3cb7c4c36da31ae0a91a47ee03adf6a11f13bc879ac82fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3eb9d56498772c1b3cb7c4c36da31ae0a91a47ee03adf6a11f13bc879ac82fa", kill_on_drop: false }`
[INFO] [stdout] e3eb9d56498772c1b3cb7c4c36da31ae0a91a47ee03adf6a11f13bc879ac82fa
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eae3e3dc5f1b15e92dbee4ccff4cf217ae982a798404cf34be6dffe365f310d0
[INFO] running `Command { std: "docker" "start" "-a" "eae3e3dc5f1b15e92dbee4ccff4cf217ae982a798404cf34be6dffe365f310d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]    Compiling tokio v1.20.1
[INFO] [stderr]     Checking iana-time-zone v0.1.46
[INFO] [stderr]    Compiling anyhow v1.0.64
[INFO] [stderr]    Compiling serde_json v1.0.83
[INFO] [stderr]     Checking once_cell v1.13.1
[INFO] [stderr]     Checking parking_lot_core v0.9.3
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking mio v0.8.4
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking chrono v0.4.22
[INFO] [stderr]     Checking chronoutil v0.2.3
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.144
[INFO] [stderr]     Checking butter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `size` and `mime_type` are never read
[INFO] [stdout]   --> src/helper.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct RcloneLsjsonItem {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub size: i64,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 20 |     #[serde(rename = "MimeType")]
[INFO] [stdout] 21 |     pub mime_type: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `size` and `mime_type` are never read
[INFO] [stdout]   --> src/helper.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct RcloneLsjsonItem {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub size: i64,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 20 |     #[serde(rename = "MimeType")]
[INFO] [stdout] 21 |     pub mime_type: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 23.68s
[INFO] running `Command { std: "docker" "inspect" "eae3e3dc5f1b15e92dbee4ccff4cf217ae982a798404cf34be6dffe365f310d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eae3e3dc5f1b15e92dbee4ccff4cf217ae982a798404cf34be6dffe365f310d0", kill_on_drop: false }`
[INFO] [stdout] eae3e3dc5f1b15e92dbee4ccff4cf217ae982a798404cf34be6dffe365f310d0