[INFO] fetching crate fundu-core 0.3.0...
[INFO] checking fundu-core-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate fundu-core 0.3.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate fundu-core 0.3.0 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 fundu-core 0.3.0
[INFO] finished tweaking crates.io crate fundu-core 0.3.0
[INFO] tweaked toml for crates.io crate fundu-core 0.3.0 written to /workspace/builds/worker-0-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 46 packages
[INFO] [stderr]       Adding time v0.3.20 (latest: v0.3.34)
[INFO] [stderr]       Adding time-core v0.1.0 (latest: v0.1.2)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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 serde_test v1.0.176
[INFO] [stderr]   Downloaded time-core v0.1.0
[INFO] [stderr]   Downloaded time v0.3.20
[INFO] [stderr]   Downloaded relative-path v1.9.2
[INFO] [stderr]   Downloaded rstest_macros v0.18.2
[INFO] [stderr]   Downloaded rstest v0.18.2
[INFO] [stderr]   Downloaded rstest_reuse v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4cf94fad2abf3e5ae9c4e166c5b349d6e426704015873efeadd21a8f9cbe84b1
[INFO] running `Command { std: "docker" "start" "-a" "4cf94fad2abf3e5ae9c4e166c5b349d6e426704015873efeadd21a8f9cbe84b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cf94fad2abf3e5ae9c4e166c5b349d6e426704015873efeadd21a8f9cbe84b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cf94fad2abf3e5ae9c4e166c5b349d6e426704015873efeadd21a8f9cbe84b1", kill_on_drop: false }`
[INFO] [stdout] 4cf94fad2abf3e5ae9c4e166c5b349d6e426704015873efeadd21a8f9cbe84b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 6e648489b42568ee02d2866815a7e51ed44418bb2098585a3ad60969ba295ec4
[INFO] running `Command { std: "docker" "start" "-a" "6e648489b42568ee02d2866815a7e51ed44418bb2098585a3ad60969ba295ec4", kill_on_drop: false }`
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling relative-path v1.9.2
[INFO] [stderr]     Checking fundu-core v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]     Checking serde_test v1.0.176
[INFO] [stderr]    Compiling rstest_macros v0.18.2
[INFO] [stderr]    Compiling rstest_reuse v0.6.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking rstest v0.18.2
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.27s
[INFO] running `Command { std: "docker" "inspect" "6e648489b42568ee02d2866815a7e51ed44418bb2098585a3ad60969ba295ec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e648489b42568ee02d2866815a7e51ed44418bb2098585a3ad60969ba295ec4", kill_on_drop: false }`
[INFO] [stdout] 6e648489b42568ee02d2866815a7e51ed44418bb2098585a3ad60969ba295ec4
[INFO] checking fundu-core-0.3.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate fundu-core 0.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate fundu-core 0.3.0 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] started tweaking crates.io crate fundu-core 0.3.0
[INFO] finished tweaking crates.io crate fundu-core 0.3.0
[INFO] tweaked toml for crates.io crate fundu-core 0.3.0 written to /workspace/builds/worker-0-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 46 packages
[INFO] [stderr]       Adding time v0.3.20 (latest: v0.3.34)
[INFO] [stderr]       Adding time-core v0.1.0 (latest: v0.1.2)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 41308d84d2f3aa72a7dfdeb1c54431180662448baf46557b30d4bb028c3ad1e7
[INFO] running `Command { std: "docker" "start" "-a" "41308d84d2f3aa72a7dfdeb1c54431180662448baf46557b30d4bb028c3ad1e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41308d84d2f3aa72a7dfdeb1c54431180662448baf46557b30d4bb028c3ad1e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41308d84d2f3aa72a7dfdeb1c54431180662448baf46557b30d4bb028c3ad1e7", kill_on_drop: false }`
[INFO] [stdout] 41308d84d2f3aa72a7dfdeb1c54431180662448baf46557b30d4bb028c3ad1e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 616d7ac38892da9157a5ca81c9d51d4155b0a559923a7774e270e443eeedb16f
[INFO] running `Command { std: "docker" "start" "-a" "616d7ac38892da9157a5ca81c9d51d4155b0a559923a7774e270e443eeedb16f", kill_on_drop: false }`
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling relative-path v1.9.2
[INFO] [stderr]     Checking fundu-core v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]     Checking serde_test v1.0.176
[INFO] [stderr]    Compiling rstest_macros v0.18.2
[INFO] [stderr]    Compiling rstest_reuse v0.6.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking rstest v0.18.2
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.79s
[INFO] running `Command { std: "docker" "inspect" "616d7ac38892da9157a5ca81c9d51d4155b0a559923a7774e270e443eeedb16f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "616d7ac38892da9157a5ca81c9d51d4155b0a559923a7774e270e443eeedb16f", kill_on_drop: false }`
[INFO] [stdout] 616d7ac38892da9157a5ca81c9d51d4155b0a559923a7774e270e443eeedb16f