[INFO] fetching crate wca 0.4.0...
[INFO] checking wca-0.4.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate wca 0.4.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate wca 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 wca 0.4.0
[INFO] finished tweaking crates.io crate wca 0.4.0
[INFO] tweaked toml for crates.io crate wca 0.4.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate wca 0.4.0 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded inspect_type v0.5.0
[INFO] [stderr]   Downloaded typing_tools v0.3.0
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[INFO] [stderr]   Downloaded basic-toml v0.1.4
[INFO] [stderr]   Downloaded type_constructor v0.1.19
[INFO] [stderr]   Downloaded winterval v0.1.5
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[INFO] [stderr]   Downloaded derive_tools v0.2.0
[INFO] [stderr]   Downloaded interval_adapter v0.2.3
[INFO] [stderr]   Downloaded macro_tools v0.2.0
[INFO] [stderr]   Downloaded mod_interface v0.6.0
[INFO] [stderr]   Downloaded former_meta v0.2.0
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[INFO] [stderr]   Downloaded impls_index v0.2.0
[INFO] [stderr]   Downloaded mod_interface_meta v0.3.0
[INFO] [stderr]   Downloaded meta_tools v0.5.0
[INFO] [stderr]   Downloaded strs_tools v0.3.0
[INFO] [stderr]   Downloaded mod_interface v0.4.0
[INFO] [stderr]   Downloaded dissimilar v1.0.7
[INFO] [stderr]   Downloaded implements v0.3.0
[INFO] [stderr]   Downloaded semver v1.0.19
[INFO] [stderr]   Downloaded is_slice v0.4.0
[INFO] [stderr]   Downloaded derive_tools_meta v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] b52784751e4db108972a9c75956472a3a5d86ae5a5c48fab3951afd611e7b7e4
[INFO] running `Command { std: "docker" "start" "-a" "b52784751e4db108972a9c75956472a3a5d86ae5a5c48fab3951afd611e7b7e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b52784751e4db108972a9c75956472a3a5d86ae5a5c48fab3951afd611e7b7e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b52784751e4db108972a9c75956472a3a5d86ae5a5c48fab3951afd611e7b7e4", kill_on_drop: false }`
[INFO] [stdout] b52784751e4db108972a9c75956472a3a5d86ae5a5c48fab3951afd611e7b7e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] ac9c407163b48c7c60de5a7beec16b9c562a634da967c4bb49be09fd2242c415
[INFO] running `Command { std: "docker" "start" "-a" "ac9c407163b48c7c60de5a7beec16b9c562a634da967c4bb49be09fd2242c415", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.68
[INFO] [stderr]    Compiling interval_adapter v0.2.3
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling semver v1.0.19
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling thiserror v1.0.49
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]    Compiling trybuild v1.0.85
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking lexical-util v0.8.5
[INFO] [stderr]    Compiling derive_tools v0.7.0
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking is_slice v0.4.0
[INFO] [stderr]     Checking for_each v0.3.0
[INFO] [stderr]     Checking type_constructor v0.1.19
[INFO] [stderr]     Checking literally v0.1.3
[INFO] [stderr]     Checking itertools v0.11.0
[INFO] [stderr]     Checking implements v0.3.0
[INFO] [stderr]     Checking termcolor v1.3.0
[INFO] [stderr]     Checking dissimilar v1.0.7
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking winterval v0.1.5
[INFO] [stderr]     Checking diagnostics_tools v0.3.0
[INFO] [stderr]     Checking closure v0.3.0
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking anymap v0.12.1
[INFO] [stderr]     Checking data_type v0.1.9
[INFO] [stderr]     Checking mem_tools v0.1.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking lexical-parse-integer v0.8.6
[INFO] [stderr]     Checking lexical-write-integer v0.8.5
[INFO] [stderr]    Compiling inspect_type v0.5.0
[INFO] [stderr]    Compiling test_tools v0.5.0
[INFO] [stderr]     Checking lexical-parse-float v0.8.5
[INFO] [stderr]     Checking lexical-write-float v0.8.5
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking typing_tools v0.3.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking lexical-core v0.8.5
[INFO] [stderr]     Checking iter_tools v0.4.0
[INFO] [stderr]     Checking lexical v6.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.49
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]     Checking basic-toml v0.1.4
[INFO] [stderr]     Checking serde_json v1.0.107
[INFO] [stderr]     Checking error_tools v0.4.0
[INFO] [stderr]    Compiling macro_tools v0.3.0
[INFO] [stderr]    Compiling macro_tools v0.2.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling derive_tools_meta v0.2.0
[INFO] [stderr]    Compiling derive_tools_meta v0.6.0
[INFO] [stderr]    Compiling former_meta v0.2.0
[INFO] [stderr]    Compiling impls_index_meta v0.2.0
[INFO] [stderr]     Checking impls_index v0.2.0
[INFO] [stderr]    Compiling variadic_from v0.2.0
[INFO] [stderr]     Checking former v0.2.0
[INFO] [stderr]     Checking strs_tools v0.3.0
[INFO] [stderr]    Compiling derive_tools v0.2.0
[INFO] [stderr]    Compiling mod_interface_meta v0.6.0
[INFO] [stderr]    Compiling mod_interface_meta v0.3.0
[INFO] [stderr]     Checking mod_interface v0.4.0
[INFO] [stderr]     Checking meta_tools v0.5.0
[INFO] [stderr]     Checking mod_interface v0.6.0
[INFO] [stderr]     Checking wca v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.43s
[INFO] running `Command { std: "docker" "inspect" "ac9c407163b48c7c60de5a7beec16b9c562a634da967c4bb49be09fd2242c415", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac9c407163b48c7c60de5a7beec16b9c562a634da967c4bb49be09fd2242c415", kill_on_drop: false }`
[INFO] [stdout] ac9c407163b48c7c60de5a7beec16b9c562a634da967c4bb49be09fd2242c415
[INFO] checking wca-0.4.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate wca 0.4.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate wca 0.4.0 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 wca 0.4.0
[INFO] finished tweaking crates.io crate wca 0.4.0
[INFO] tweaked toml for crates.io crate wca 0.4.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate wca 0.4.0 already has a lockfile, it will not be regenerated
[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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] a567efdc315ad407ae5b9e71d4aeee439d50b22a0273cbe99b3b6268839b2994
[INFO] running `Command { std: "docker" "start" "-a" "a567efdc315ad407ae5b9e71d4aeee439d50b22a0273cbe99b3b6268839b2994", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a567efdc315ad407ae5b9e71d4aeee439d50b22a0273cbe99b3b6268839b2994", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a567efdc315ad407ae5b9e71d4aeee439d50b22a0273cbe99b3b6268839b2994", kill_on_drop: false }`
[INFO] [stdout] a567efdc315ad407ae5b9e71d4aeee439d50b22a0273cbe99b3b6268839b2994
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] e5ec1c769f9ecf0254e707269c7fffca404a97ebd5b1f7312ab1e8746ba08002
[INFO] running `Command { std: "docker" "start" "-a" "e5ec1c769f9ecf0254e707269c7fffca404a97ebd5b1f7312ab1e8746ba08002", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.68
[INFO] [stderr]    Compiling interval_adapter v0.2.3
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling semver v1.0.19
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]    Compiling thiserror v1.0.49
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]    Compiling trybuild v1.0.85
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking lexical-util v0.8.5
[INFO] [stderr]    Compiling derive_tools v0.7.0
[INFO] [stderr]    Compiling itertools v0.11.0
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking literally v0.1.3
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking implements v0.3.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking type_constructor v0.1.19
[INFO] [stderr]     Checking for_each v0.3.0
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]     Checking dissimilar v1.0.7
[INFO] [stderr]     Checking winterval v0.1.5
[INFO] [stderr]     Checking is_slice v0.4.0
[INFO] [stderr]     Checking termcolor v1.3.0
[INFO] [stderr]     Checking mem_tools v0.1.1
[INFO] [stderr]     Checking data_type v0.1.9
[INFO] [stderr]     Checking anymap v0.12.1
[INFO] [stderr]     Checking closure v0.3.0
[INFO] [stderr]     Checking diagnostics_tools v0.3.0
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking lexical-write-integer v0.8.5
[INFO] [stderr]     Checking lexical-parse-integer v0.8.6
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking lexical-parse-float v0.8.5
[INFO] [stderr]     Checking lexical-write-float v0.8.5
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling inspect_type v0.5.0
[INFO] [stderr]    Compiling test_tools v0.5.0
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking iter_tools v0.4.0
[INFO] [stderr]     Checking typing_tools v0.3.0
[INFO] [stderr]     Checking lexical-core v0.8.5
[INFO] [stderr]     Checking lexical v6.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.49
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]     Checking basic-toml v0.1.4
[INFO] [stderr]     Checking serde_json v1.0.107
[INFO] [stderr]     Checking error_tools v0.4.0
[INFO] [stderr]    Compiling macro_tools v0.3.0
[INFO] [stderr]    Compiling macro_tools v0.2.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling derive_tools_meta v0.2.0
[INFO] [stderr]    Compiling derive_tools_meta v0.6.0
[INFO] [stderr]    Compiling impls_index_meta v0.2.0
[INFO] [stderr]    Compiling former_meta v0.2.0
[INFO] [stderr]    Compiling variadic_from v0.2.0
[INFO] [stderr]     Checking impls_index v0.2.0
[INFO] [stderr]     Checking former v0.2.0
[INFO] [stderr]    Compiling derive_tools v0.2.0
[INFO] [stderr]    Compiling mod_interface_meta v0.3.0
[INFO] [stderr]    Compiling mod_interface_meta v0.6.0
[INFO] [stderr]     Checking strs_tools v0.3.0
[INFO] [stderr]     Checking mod_interface v0.6.0
[INFO] [stderr]     Checking wca v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking mod_interface v0.4.0
[INFO] [stderr]     Checking meta_tools v0.5.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.33s
[INFO] running `Command { std: "docker" "inspect" "e5ec1c769f9ecf0254e707269c7fffca404a97ebd5b1f7312ab1e8746ba08002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5ec1c769f9ecf0254e707269c7fffca404a97ebd5b1f7312ab1e8746ba08002", kill_on_drop: false }`
[INFO] [stdout] e5ec1c769f9ecf0254e707269c7fffca404a97ebd5b1f7312ab1e8746ba08002