[INFO] fetching crate serde_krds 0.1.1...
[INFO] checking serde_krds-0.1.1 against try#24cd45d7714ba43afd4b8e62fb677b069b21c4a5 for pr-129543
[INFO] extracting crate serde_krds 0.1.1 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate serde_krds 0.1.1 on toolchain 24cd45d7714ba43afd4b8e62fb677b069b21c4a5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_krds 0.1.1
[INFO] finished tweaking crates.io crate serde_krds 0.1.1
[INFO] tweaked toml for crates.io crate serde_krds 0.1.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aab4e45ece19db59e2649aece7d1612407db1d59c90411da81ee4c33bca0bc8f
[INFO] running `Command { std: "docker" "start" "-a" "aab4e45ece19db59e2649aece7d1612407db1d59c90411da81ee4c33bca0bc8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aab4e45ece19db59e2649aece7d1612407db1d59c90411da81ee4c33bca0bc8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aab4e45ece19db59e2649aece7d1612407db1d59c90411da81ee4c33bca0bc8f", kill_on_drop: false }`
[INFO] [stdout] aab4e45ece19db59e2649aece7d1612407db1d59c90411da81ee4c33bca0bc8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1408598158edda1dea9405df6db9376871ea2ba2cfb1d362113928e0a2ba838
[INFO] running `Command { std: "docker" "start" "-a" "f1408598158edda1dea9405df6db9376871ea2ba2cfb1d362113928e0a2ba838", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking serde_krds v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `MapKeySerializer` is never constructed
[INFO] [stdout]    --> src/ser.rs:366:8
[INFO] [stdout]     |
[INFO] [stdout] 366 | struct MapKeySerializer;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bad_key_err` is never used
[INFO] [stdout]    --> src/ser.rs:368:4
[INFO] [stdout]     |
[INFO] [stdout] 368 | fn bad_key_err() -> Error {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking kindle_formats v0.1.3
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MapKeySerializer` is never constructed
[INFO] [stdout]    --> src/ser.rs:366:8
[INFO] [stdout]     |
[INFO] [stdout] 366 | struct MapKeySerializer;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bad_key_err` is never used
[INFO] [stdout]    --> src/ser.rs:368:4
[INFO] [stdout]     |
[INFO] [stdout] 368 | fn bad_key_err() -> Error {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.13s
[INFO] running `Command { std: "docker" "inspect" "f1408598158edda1dea9405df6db9376871ea2ba2cfb1d362113928e0a2ba838", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1408598158edda1dea9405df6db9376871ea2ba2cfb1d362113928e0a2ba838", kill_on_drop: false }`
[INFO] [stdout] f1408598158edda1dea9405df6db9376871ea2ba2cfb1d362113928e0a2ba838