[INFO] fetching crate rlua_serde 0.4.0...
[INFO] checking rlua_serde-0.4.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rlua_serde 0.4.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate rlua_serde 0.4.0 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 rlua_serde 0.4.0
[INFO] finished tweaking crates.io crate rlua_serde 0.4.0
[INFO] tweaked toml for crates.io crate rlua_serde 0.4.0 written to /workspace/builds/worker-2-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 15 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding bstr v0.2.17 (latest: v1.9.1)
[INFO] [stderr]       Adding rlua v0.17.1 (latest: v0.20.0)
[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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 04f91d75bd8639e4f3847cd07d9fa6a3c82a8aa6d5c1b1220f6f35ed8f6be28f
[INFO] running `Command { std: "docker" "start" "-a" "04f91d75bd8639e4f3847cd07d9fa6a3c82a8aa6d5c1b1220f6f35ed8f6be28f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04f91d75bd8639e4f3847cd07d9fa6a3c82a8aa6d5c1b1220f6f35ed8f6be28f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04f91d75bd8639e4f3847cd07d9fa6a3c82a8aa6d5c1b1220f6f35ed8f6be28f", kill_on_drop: false }`
[INFO] [stdout] 04f91d75bd8639e4f3847cd07d9fa6a3c82a8aa6d5c1b1220f6f35ed8f6be28f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 572bcccb25a48f510f8bb3abbae7322484ff19aeb7a16758fd02758ccf58d2e3
[INFO] running `Command { std: "docker" "start" "-a" "572bcccb25a48f510f8bb3abbae7322484ff19aeb7a16758fd02758ccf58d2e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling rlua v0.17.1
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking rlua_serde v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]   --> src/error.rs:5:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | use serde;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | extern crate serde;
[INFO] [stdout]    | ------------------- the item `serde` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]   --> src/ser.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use serde;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | extern crate serde;
[INFO] [stdout]    | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]   --> src/de.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use serde;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | extern crate serde;
[INFO] [stdout]    | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]   --> src/error.rs:5:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | use serde;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | extern crate serde;
[INFO] [stdout]    | ------------------- the item `serde` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]   --> src/ser.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use serde;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | extern crate serde;
[INFO] [stdout]    | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]   --> src/de.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use serde;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | extern crate serde;
[INFO] [stdout]    | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings 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 5.00s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rlua v0.17.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] running `Command { std: "docker" "inspect" "572bcccb25a48f510f8bb3abbae7322484ff19aeb7a16758fd02758ccf58d2e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "572bcccb25a48f510f8bb3abbae7322484ff19aeb7a16758fd02758ccf58d2e3", kill_on_drop: false }`
[INFO] [stdout] 572bcccb25a48f510f8bb3abbae7322484ff19aeb7a16758fd02758ccf58d2e3