[INFO] fetching crate syntaxdot-encoders 0.5.0...
[INFO] checking syntaxdot-encoders-0.5.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate syntaxdot-encoders 0.5.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate syntaxdot-encoders 0.5.0 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 syntaxdot-encoders 0.5.0
[INFO] finished tweaking crates.io crate syntaxdot-encoders 0.5.0
[INFO] tweaked toml for crates.io crate syntaxdot-encoders 0.5.0 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 94 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding fixedbitset v0.4.2 (latest: v0.5.6)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding ordered-float v2.10.1 (latest: v4.2.0)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[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 conllu v0.8.0
[INFO] [stderr]   Downloaded numberer v0.2.1
[INFO] [stderr]   Downloaded seqalign v0.2.3
[INFO] [stderr]   Downloaded fst v0.4.7
[INFO] [stderr]   Downloaded udgraph v0.8.0
[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] ec75473e01d0cd77f54b1b2eb8643ae346116afb89cca234e1c7c95faa5584a1
[INFO] running `Command { std: "docker" "start" "-a" "ec75473e01d0cd77f54b1b2eb8643ae346116afb89cca234e1c7c95faa5584a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec75473e01d0cd77f54b1b2eb8643ae346116afb89cca234e1c7c95faa5584a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec75473e01d0cd77f54b1b2eb8643ae346116afb89cca234e1c7c95faa5584a1", kill_on_drop: false }`
[INFO] [stdout] ec75473e01d0cd77f54b1b2eb8643ae346116afb89cca234e1c7c95faa5584a1
[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] bd0c2460d4da5f3cf80a4e57e48688b0cb83a013a7c914e170a8022d97bc5182
[INFO] running `Command { std: "docker" "start" "-a" "bd0c2460d4da5f3cf80a4e57e48688b0cb83a013a7c914e170a8022d97bc5182", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling regex-syntax v0.8.3
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]     Checking fixedbitset v0.4.2
[INFO] [stderr]    Compiling fst v0.4.7
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking numberer v0.2.1
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking seqalign v0.2.3
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]     Checking udgraph v0.8.0
[INFO] [stderr]     Checking conllu v0.8.0
[INFO] [stderr]     Checking ndarray-rand v0.14.0
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling caseless v0.2.1
[INFO] [stderr]     Checking syntaxdot-encoders v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.05s
[INFO] running `Command { std: "docker" "inspect" "bd0c2460d4da5f3cf80a4e57e48688b0cb83a013a7c914e170a8022d97bc5182", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd0c2460d4da5f3cf80a4e57e48688b0cb83a013a7c914e170a8022d97bc5182", kill_on_drop: false }`
[INFO] [stdout] bd0c2460d4da5f3cf80a4e57e48688b0cb83a013a7c914e170a8022d97bc5182
[INFO] checking syntaxdot-encoders-0.5.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate syntaxdot-encoders 0.5.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate syntaxdot-encoders 0.5.0 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 syntaxdot-encoders 0.5.0
[INFO] finished tweaking crates.io crate syntaxdot-encoders 0.5.0
[INFO] tweaked toml for crates.io crate syntaxdot-encoders 0.5.0 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 94 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding fixedbitset v0.4.2 (latest: v0.5.6)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding ordered-float v2.10.1 (latest: v4.2.0)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[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-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] a541a619e44dfe516823d4f9446f736d07def2f891199d31a5d784e18832a8da
[INFO] running `Command { std: "docker" "start" "-a" "a541a619e44dfe516823d4f9446f736d07def2f891199d31a5d784e18832a8da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a541a619e44dfe516823d4f9446f736d07def2f891199d31a5d784e18832a8da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a541a619e44dfe516823d4f9446f736d07def2f891199d31a5d784e18832a8da", kill_on_drop: false }`
[INFO] [stdout] a541a619e44dfe516823d4f9446f736d07def2f891199d31a5d784e18832a8da
[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] 5dcb7b6a12baa6a0633881cd8760bf91bc36574f4a89cf9691fa0c4b719bfb7f
[INFO] running `Command { std: "docker" "start" "-a" "5dcb7b6a12baa6a0633881cd8760bf91bc36574f4a89cf9691fa0c4b719bfb7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling regex-syntax v0.8.3
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]     Checking fixedbitset v0.4.2
[INFO] [stderr]    Compiling fst v0.4.7
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking numberer v0.2.1
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking seqalign v0.2.3
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]     Checking udgraph v0.8.0
[INFO] [stderr]     Checking conllu v0.8.0
[INFO] [stderr]     Checking ndarray-rand v0.14.0
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling caseless v0.2.1
[INFO] [stderr]     Checking syntaxdot-encoders v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.96s
[INFO] running `Command { std: "docker" "inspect" "5dcb7b6a12baa6a0633881cd8760bf91bc36574f4a89cf9691fa0c4b719bfb7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dcb7b6a12baa6a0633881cd8760bf91bc36574f4a89cf9691fa0c4b719bfb7f", kill_on_drop: false }`
[INFO] [stdout] 5dcb7b6a12baa6a0633881cd8760bf91bc36574f4a89cf9691fa0c4b719bfb7f