[INFO] fetching crate gm-types 0.4.0-pre...
[INFO] checking gm-types-0.4.0-pre against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate gm-types 0.4.0-pre into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate gm-types 0.4.0-pre 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 gm-types 0.4.0-pre
[INFO] finished tweaking crates.io crate gm-types 0.4.0-pre
[INFO] tweaked toml for crates.io crate gm-types 0.4.0-pre written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[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] 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] 60bec2479d00b15b3c68aad677b49e9258fffd84578b6c62964ac338b3f8d947
[INFO] running `Command { std: "docker" "start" "-a" "60bec2479d00b15b3c68aad677b49e9258fffd84578b6c62964ac338b3f8d947", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60bec2479d00b15b3c68aad677b49e9258fffd84578b6c62964ac338b3f8d947", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60bec2479d00b15b3c68aad677b49e9258fffd84578b6c62964ac338b3f8d947", kill_on_drop: false }`
[INFO] [stdout] 60bec2479d00b15b3c68aad677b49e9258fffd84578b6c62964ac338b3f8d947
[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] d9a9001f0c005b84f7fe9bcb8ed3c1e531fb821b09ad700b0606befa489ffccc
[INFO] running `Command { std: "docker" "start" "-a" "d9a9001f0c005b84f7fe9bcb8ed3c1e531fb821b09ad700b0606befa489ffccc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking gm-types v0.4.0-pre (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `de` is imported redundantly
[INFO] [stdout]  --> src/events.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde::*;
[INFO] [stdout]   |     -------- the item `de` is already imported here
[INFO] [stdout] 6 | use serde_json::Value;
[INFO] [stdout] 7 | use serde::de;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `de` is imported redundantly
[INFO] [stdout]  --> src/events.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde::*;
[INFO] [stdout]   |     -------- the item `de` is already imported here
[INFO] [stdout] 6 | use serde_json::Value;
[INFO] [stdout] 7 | use serde::de;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::slice::Iter` in tuple element 1 that must be used
[INFO] [stdout]    --> src/sync.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |             self.rooms.remove(0);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::slice::Iter` in tuple element 1 that must be used
[INFO] [stdout]    --> src/sync.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |             self.rooms.remove(0);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.54s
[INFO] running `Command { std: "docker" "inspect" "d9a9001f0c005b84f7fe9bcb8ed3c1e531fb821b09ad700b0606befa489ffccc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9a9001f0c005b84f7fe9bcb8ed3c1e531fb821b09ad700b0606befa489ffccc", kill_on_drop: false }`
[INFO] [stdout] d9a9001f0c005b84f7fe9bcb8ed3c1e531fb821b09ad700b0606befa489ffccc