[INFO] fetching crate frunk_core 0.4.2...
[INFO] checking frunk_core-0.4.2 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate frunk_core 0.4.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate frunk_core 0.4.2 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate frunk_core 0.4.2
[INFO] finished tweaking crates.io crate frunk_core 0.4.2
[INFO] tweaked toml for crates.io crate frunk_core 0.4.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 12 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4f2c0284cbbf787b0272977f0718627b781eaf128dd4908dc0104548e9e0c1b
[INFO] running `Command { std: "docker" "start" "-a" "a4f2c0284cbbf787b0272977f0718627b781eaf128dd4908dc0104548e9e0c1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4f2c0284cbbf787b0272977f0718627b781eaf128dd4908dc0104548e9e0c1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4f2c0284cbbf787b0272977f0718627b781eaf128dd4908dc0104548e9e0c1b", kill_on_drop: false }`
[INFO] [stdout] a4f2c0284cbbf787b0272977f0718627b781eaf128dd4908dc0104548e9e0c1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 329bbd60dc4510e12ad3ccc0d3c0928017a7df1cc0c67f47245f796330a0b940
[INFO] running `Command { std: "docker" "start" "-a" "329bbd60dc4510e12ad3ccc0d3c0928017a7df1cc0c67f47245f796330a0b940", kill_on_drop: false }`
[INFO] [stderr]    Compiling frunk_core v0.4.3
[INFO] [stderr]     Checking frunk_core v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/coproduct.rs:682:13
[INFO] [stdout]     |
[INFO] [stdout] 682 |             Coproduct::Inr(never) => match never {},
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ matches no values because `CNil` is uninhabited
[INFO] [stdout]     |
[INFO] [stdout]     = note: to learn more about uninhabited types, see https://doc.rust-lang.org/nomicon/exotic-sizes.html#empty-types
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling frunk_proc_macro_helpers v0.1.3
[INFO] [stderr]    Compiling frunk_derives v0.4.3
[INFO] [stderr]    Compiling frunk_proc_macros v0.1.3
[INFO] [stderr]     Checking frunk v0.4.3
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/coproduct.rs:682:13
[INFO] [stdout]     |
[INFO] [stdout] 682 |             Coproduct::Inr(never) => match never {},
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ matches no values because `coproduct::CNil` is uninhabited
[INFO] [stdout]     |
[INFO] [stdout]     = note: to learn more about uninhabited types, see https://doc.rust-lang.org/nomicon/exotic-sizes.html#empty-types
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` 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 5.06s
[INFO] running `Command { std: "docker" "inspect" "329bbd60dc4510e12ad3ccc0d3c0928017a7df1cc0c67f47245f796330a0b940", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "329bbd60dc4510e12ad3ccc0d3c0928017a7df1cc0c67f47245f796330a0b940", kill_on_drop: false }`
[INFO] [stdout] 329bbd60dc4510e12ad3ccc0d3c0928017a7df1cc0c67f47245f796330a0b940