[INFO] fetching crate prototk 0.4.0...
[INFO] checking prototk-0.4.0 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-2
[INFO] extracting crate prototk 0.4.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate prototk 0.4.0 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prototk 0.4.0
[INFO] finished tweaking crates.io crate prototk 0.4.0
[INFO] tweaked toml for crates.io crate prototk 0.4.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages
[INFO] [stderr]       Adding buffertk v0.4.0 (latest: v0.6.0)
[INFO] [stderr]       Adding prototk_derive v0.4.0 (latest: v0.6.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.57)
[INFO] [stderr]       Adding zerror v0.2.0 (latest: v0.4.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded buffertk v0.4.0
[INFO] [stderr]   Downloaded prototk_derive v0.4.0
[INFO] [stderr]   Downloaded zerror v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab1b4db6b4c8bcc8cac711facfe56b44d18330d8ac21e2f7c43785975915e007
[INFO] running `Command { std: "docker" "start" "-a" "ab1b4db6b4c8bcc8cac711facfe56b44d18330d8ac21e2f7c43785975915e007", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab1b4db6b4c8bcc8cac711facfe56b44d18330d8ac21e2f7c43785975915e007", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab1b4db6b4c8bcc8cac711facfe56b44d18330d8ac21e2f7c43785975915e007", kill_on_drop: false }`
[INFO] [stdout] ab1b4db6b4c8bcc8cac711facfe56b44d18330d8ac21e2f7c43785975915e007
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1bfb96f75a5f4bdda7128eb91a5c7b90883f2397e96abe5e198d73c4640adbd5
[INFO] running `Command { std: "docker" "start" "-a" "1bfb96f75a5f4bdda7128eb91a5c7b90883f2397e96abe5e198d73c4640adbd5", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling buffertk v0.4.0
[INFO] [stderr]     Checking zerror v0.2.0
[INFO] [stderr]    Compiling prototk_derive v0.4.0
[INFO] [stderr]     Checking prototk v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]   --> src/field_types.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::convert::TryInto;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryInto` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `stack_pack` is imported redundantly
[INFO] [stdout]   --> src/field_types.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 | use buffertk::{stack_pack, Buffer, Unpackable, Unpacker};
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 19 |
[INFO] [stdout] 20 | use super::*;
[INFO] [stdout]    |     -------- the item `stack_pack` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Debug` is imported redundantly
[INFO] [stdout]     --> src/field_types.rs:1489:9
[INFO] [stdout]      |
[INFO] [stdout] 1489 |     use std::fmt::Debug;
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 1490 |
[INFO] [stdout] 1491 |     use crate::field_types::*;
[INFO] [stdout]      |         --------------------- the item `Debug` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]   --> src/field_types.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::convert::TryInto;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryInto` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `stack_pack` is imported redundantly
[INFO] [stdout]   --> src/field_types.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 | use buffertk::{stack_pack, Buffer, Unpackable, Unpacker};
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 19 |
[INFO] [stdout] 20 | use super::*;
[INFO] [stdout]    |     -------- the item `stack_pack` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Unpackable` is imported redundantly
[INFO] [stdout]   --> src/field_types.rs:18:36
[INFO] [stdout]    |
[INFO] [stdout] 18 | use buffertk::{stack_pack, Buffer, Unpackable, Unpacker};
[INFO] [stdout]    |                                    ^^^^^^^^^^
[INFO] [stdout] 19 |
[INFO] [stdout] 20 | use super::*;
[INFO] [stdout]    |     -------- the item `Unpackable` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Unpacker` is imported redundantly
[INFO] [stdout]   --> src/field_types.rs:18:48
[INFO] [stdout]    |
[INFO] [stdout] 18 | use buffertk::{stack_pack, Buffer, Unpackable, Unpacker};
[INFO] [stdout]    |                                                ^^^^^^^^
[INFO] [stdout] 19 |
[INFO] [stdout] 20 | use super::*;
[INFO] [stdout]    |     -------- the item `Unpacker` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.97s
[INFO] running `Command { std: "docker" "inspect" "1bfb96f75a5f4bdda7128eb91a5c7b90883f2397e96abe5e198d73c4640adbd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bfb96f75a5f4bdda7128eb91a5c7b90883f2397e96abe5e198d73c4640adbd5", kill_on_drop: false }`
[INFO] [stdout] 1bfb96f75a5f4bdda7128eb91a5c7b90883f2397e96abe5e198d73c4640adbd5