[INFO] fetching crate slog-extlog 8.1.0...
[INFO] checking slog-extlog-8.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate slog-extlog 8.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate slog-extlog 8.1.0 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] removed /workspace/builds/worker-1-tc1/source/.cargo/config
[INFO] started tweaking crates.io crate slog-extlog 8.1.0
[INFO] finished tweaking crates.io crate slog-extlog 8.1.0
[INFO] tweaked toml for crates.io crate slog-extlog 8.1.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages
[INFO] [stderr]       Adding erased-serde v0.3.31 (latest: v0.4.4)
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bencher v0.1.5
[INFO] [stderr]   Downloaded iobuffer v0.2.0
[INFO] [stderr]   Downloaded slog-json v2.6.1
[INFO] [stderr]   Downloaded slog-extlog-derive v8.1.0
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82547c19cffd3e12797c1a6079fb6875e1de4921dd907f5d4913b40abd246662
[INFO] running `Command { std: "docker" "start" "-a" "82547c19cffd3e12797c1a6079fb6875e1de4921dd907f5d4913b40abd246662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82547c19cffd3e12797c1a6079fb6875e1de4921dd907f5d4913b40abd246662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82547c19cffd3e12797c1a6079fb6875e1de4921dd907f5d4913b40abd246662", kill_on_drop: false }`
[INFO] [stdout] 82547c19cffd3e12797c1a6079fb6875e1de4921dd907f5d4913b40abd246662
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79af2cef9737add7acc5a135948340fdcabd002b5f633ca99160545fd09b6cb7
[INFO] running `Command { std: "docker" "start" "-a" "79af2cef9737add7acc5a135948340fdcabd002b5f633ca99160545fd09b6cb7", kill_on_drop: false }`
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]     Checking num-conv v0.1.0
[INFO] [stderr]     Checking time-core v0.1.2
[INFO] [stderr]     Checking iobuffer v0.2.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking erased-serde v0.3.31
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking slog-json v2.6.1
[INFO] [stderr]     Checking slog-extlog v8.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling slog-extlog-derive v8.1.0
[INFO] [stdout] warning: struct `FooDecrLog` is never constructed
[INFO] [stdout]   --> benches/stats.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct FooDecrLog {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CumulBucketCounterLog` is never constructed
[INFO] [stdout]    --> tests/stats_query.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | struct CumulBucketCounterLog {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.09s
[INFO] running `Command { std: "docker" "inspect" "79af2cef9737add7acc5a135948340fdcabd002b5f633ca99160545fd09b6cb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79af2cef9737add7acc5a135948340fdcabd002b5f633ca99160545fd09b6cb7", kill_on_drop: false }`
[INFO] [stdout] 79af2cef9737add7acc5a135948340fdcabd002b5f633ca99160545fd09b6cb7
[INFO] checking slog-extlog-8.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate slog-extlog 8.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate slog-extlog 8.1.0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-1-tc2/source/.cargo/config
[INFO] started tweaking crates.io crate slog-extlog 8.1.0
[INFO] finished tweaking crates.io crate slog-extlog 8.1.0
[INFO] tweaked toml for crates.io crate slog-extlog 8.1.0 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages
[INFO] [stderr]       Adding erased-serde v0.3.31 (latest: v0.4.4)
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2abc90178cdbbd989088dae2357775eb025efbe5c4d0aec67d64574987bcb93
[INFO] running `Command { std: "docker" "start" "-a" "e2abc90178cdbbd989088dae2357775eb025efbe5c4d0aec67d64574987bcb93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2abc90178cdbbd989088dae2357775eb025efbe5c4d0aec67d64574987bcb93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2abc90178cdbbd989088dae2357775eb025efbe5c4d0aec67d64574987bcb93", kill_on_drop: false }`
[INFO] [stdout] e2abc90178cdbbd989088dae2357775eb025efbe5c4d0aec67d64574987bcb93
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f0490738984f65c23df672347c72a7cfe0a3fd44fc4afb0ab6d8e5bbb552bbd2
[INFO] running `Command { std: "docker" "start" "-a" "f0490738984f65c23df672347c72a7cfe0a3fd44fc4afb0ab6d8e5bbb552bbd2", kill_on_drop: false }`
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]     Checking time-core v0.1.2
[INFO] [stderr]     Checking num-conv v0.1.0
[INFO] [stderr]     Checking iobuffer v0.2.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]    Compiling erased-serde v0.3.31
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking slog-json v2.6.1
[INFO] [stderr]    Compiling slog-extlog-derive v8.1.0
[INFO] [stderr]     Checking slog-extlog v8.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `FooDecrLog` is never constructed
[INFO] [stdout]   --> benches/stats.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct FooDecrLog {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CumulBucketCounterLog` is never constructed
[INFO] [stdout]    --> tests/stats_query.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | struct CumulBucketCounterLog {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.01s
[INFO] running `Command { std: "docker" "inspect" "f0490738984f65c23df672347c72a7cfe0a3fd44fc4afb0ab6d8e5bbb552bbd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0490738984f65c23df672347c72a7cfe0a3fd44fc4afb0ab6d8e5bbb552bbd2", kill_on_drop: false }`
[INFO] [stdout] f0490738984f65c23df672347c72a7cfe0a3fd44fc4afb0ab6d8e5bbb552bbd2