[INFO] fetching crate custom_error 1.9.2...
[INFO] checking custom_error-1.9.2 against master#020bbe46bdf613c0b8211984eaa8e5fe97d6c92d for pr-122960
[INFO] extracting crate custom_error 1.9.2 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate custom_error 1.9.2 on toolchain 020bbe46bdf613c0b8211984eaa8e5fe97d6c92d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate custom_error 1.9.2
[INFO] finished tweaking crates.io crate custom_error 1.9.2
[INFO] tweaked toml for crates.io crate custom_error 1.9.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4dad572213d1e5f4a4a3036091613013f48d3ebd23a1d49dfac60520c47d08b2
[INFO] running `Command { std: "docker" "start" "-a" "4dad572213d1e5f4a4a3036091613013f48d3ebd23a1d49dfac60520c47d08b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dad572213d1e5f4a4a3036091613013f48d3ebd23a1d49dfac60520c47d08b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dad572213d1e5f4a4a3036091613013f48d3ebd23a1d49dfac60520c47d08b2", kill_on_drop: false }`
[INFO] [stdout] 4dad572213d1e5f4a4a3036091613013f48d3ebd23a1d49dfac60520c47d08b2
[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" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7951d0d900fa1192b4b59730fe8c8a7089896365537222162362c530876c475
[INFO] running `Command { std: "docker" "start" "-a" "e7951d0d900fa1192b4b59730fe8c8a7089896365537222162362c530876c475", kill_on_drop: false }`
[INFO] [stderr]     Checking custom_error v1.9.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: named argument `description` is not used by name
[INFO] [stdout]    --> src/lib.rs:580:32
[INFO] [stdout]     |
[INFO] [stdout] 580 |         custom_error!(MyError {description: &'static str} = "{}");
[INFO] [stdout]     |                                ^^^^^^^^^^^ this named argument is referred to by position in formatting string
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(named_arguments_used_positionally)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: named argument `x` is not used by name
[INFO] [stdout]    --> src/lib.rs:652:41
[INFO] [stdout]     |
[INFO] [stdout] 652 |             custom_error! {pub MyError {x: &'static str} = "{}"}
[INFO] [stdout]     |                                         ^ this named argument is referred to by position in formatting string
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: named argument `x` is not used by name
[INFO] [stdout]    --> src/lib.rs:662:17
[INFO] [stdout]     |
[INFO] [stdout] 662 |                 x: &'static str
[INFO] [stdout]     |                 ^ this named argument is referred to by position in formatting string
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> tests/tests.rs:5:70
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::{fs::File, io, io::ErrorKind, io::Read, num::ParseIntError, result::Result};
[INFO] [stdout]   |                                                                      ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/020bbe46bdf613c0b8211984eaa8e5fe97d6c92d/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "e7951d0d900fa1192b4b59730fe8c8a7089896365537222162362c530876c475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7951d0d900fa1192b4b59730fe8c8a7089896365537222162362c530876c475", kill_on_drop: false }`
[INFO] [stdout] e7951d0d900fa1192b4b59730fe8c8a7089896365537222162362c530876c475
[INFO] checking custom_error-1.9.2 against try#8e5ca945edcf8a11e3cd7ac6d9fda930a8832cde for pr-122960
[INFO] extracting crate custom_error 1.9.2 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate custom_error 1.9.2 on toolchain 8e5ca945edcf8a11e3cd7ac6d9fda930a8832cde
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8e5ca945edcf8a11e3cd7ac6d9fda930a8832cde" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate custom_error 1.9.2
[INFO] finished tweaking crates.io crate custom_error 1.9.2
[INFO] tweaked toml for crates.io crate custom_error 1.9.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8e5ca945edcf8a11e3cd7ac6d9fda930a8832cde" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8e5ca945edcf8a11e3cd7ac6d9fda930a8832cde" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+8e5ca945edcf8a11e3cd7ac6d9fda930a8832cde" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90bb9ea17e8ba536531fafa3fd5717d83fb06aad89594272212be54c1a3be3d5
[INFO] running `Command { std: "docker" "start" "-a" "90bb9ea17e8ba536531fafa3fd5717d83fb06aad89594272212be54c1a3be3d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90bb9ea17e8ba536531fafa3fd5717d83fb06aad89594272212be54c1a3be3d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90bb9ea17e8ba536531fafa3fd5717d83fb06aad89594272212be54c1a3be3d5", kill_on_drop: false }`
[INFO] [stdout] 90bb9ea17e8ba536531fafa3fd5717d83fb06aad89594272212be54c1a3be3d5
[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" "+8e5ca945edcf8a11e3cd7ac6d9fda930a8832cde" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 177583aed15244e59c9257b69244457ac8e2fc1dddcaf1dc84c3c1df6613d538
[INFO] running `Command { std: "docker" "start" "-a" "177583aed15244e59c9257b69244457ac8e2fc1dddcaf1dc84c3c1df6613d538", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] skipping non-2021 edition `2018`
[INFO] running `Command { std: "docker" "inspect" "177583aed15244e59c9257b69244457ac8e2fc1dddcaf1dc84c3c1df6613d538", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "177583aed15244e59c9257b69244457ac8e2fc1dddcaf1dc84c3c1df6613d538", kill_on_drop: false }`
[INFO] [stdout] 177583aed15244e59c9257b69244457ac8e2fc1dddcaf1dc84c3c1df6613d538