[INFO] cloning repository https://github.com/jleano/pyo3-dns-tutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jleano/pyo3-dns-tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjleano%2Fpyo3-dns-tutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjleano%2Fpyo3-dns-tutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cd34c942c79652532bf4d47037ab7d88a93c38bf
[INFO] checking jleano/pyo3-dns-tutorial against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjleano%2Fpyo3-dns-tutorial" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jleano/pyo3-dns-tutorial 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 git repo https://github.com/jleano/pyo3-dns-tutorial
[INFO] finished tweaking git repo https://github.com/jleano/pyo3-dns-tutorial
[INFO] tweaked toml for git repo https://github.com/jleano/pyo3-dns-tutorial written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jleano/pyo3-dns-tutorial 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] 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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26789d7893af0095d1b60b6e93046ea4f2ab2dfa9f0f71d45cfe66d823941ef2
[INFO] running `Command { std: "docker" "start" "-a" "26789d7893af0095d1b60b6e93046ea4f2ab2dfa9f0f71d45cfe66d823941ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26789d7893af0095d1b60b6e93046ea4f2ab2dfa9f0f71d45cfe66d823941ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26789d7893af0095d1b60b6e93046ea4f2ab2dfa9f0f71d45cfe66d823941ef2", kill_on_drop: false }`
[INFO] [stdout] 26789d7893af0095d1b60b6e93046ea4f2ab2dfa9f0f71d45cfe66d823941ef2
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03e8b0d5afbcc03430238ccf77b77ddb11da4a8a200d78e12351bcba99c18c7d
[INFO] running `Command { std: "docker" "start" "-a" "03e8b0d5afbcc03430238ccf77b77ddb11da4a8a200d78e12351bcba99c18c7d", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.12.11
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking smallvec v1.11.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking unindent v0.1.11
[INFO] [stderr]     Checking lock_api v0.4.10
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling pyo3-build-config v0.19.2
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling pyo3-ffi v0.19.2
[INFO] [stderr]    Compiling pyo3 v0.19.2
[INFO] [stderr]    Compiling pyo3-macros-backend v0.19.2
[INFO] [stderr]    Compiling pyo3-macros v0.19.2
[INFO] [stderr]     Checking dns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.38s
[INFO] running `Command { std: "docker" "inspect" "03e8b0d5afbcc03430238ccf77b77ddb11da4a8a200d78e12351bcba99c18c7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03e8b0d5afbcc03430238ccf77b77ddb11da4a8a200d78e12351bcba99c18c7d", kill_on_drop: false }`
[INFO] [stdout] 03e8b0d5afbcc03430238ccf77b77ddb11da4a8a200d78e12351bcba99c18c7d
[INFO] checking jleano/pyo3-dns-tutorial against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjleano%2Fpyo3-dns-tutorial" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jleano/pyo3-dns-tutorial 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 git repo https://github.com/jleano/pyo3-dns-tutorial
[INFO] finished tweaking git repo https://github.com/jleano/pyo3-dns-tutorial
[INFO] tweaked toml for git repo https://github.com/jleano/pyo3-dns-tutorial written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jleano/pyo3-dns-tutorial 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 42fc0342de4042dfa53e16ff2fec1af3234a35a167fafec3a0f7daf1b52491ae
[INFO] running `Command { std: "docker" "start" "-a" "42fc0342de4042dfa53e16ff2fec1af3234a35a167fafec3a0f7daf1b52491ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42fc0342de4042dfa53e16ff2fec1af3234a35a167fafec3a0f7daf1b52491ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42fc0342de4042dfa53e16ff2fec1af3234a35a167fafec3a0f7daf1b52491ae", kill_on_drop: false }`
[INFO] [stdout] 42fc0342de4042dfa53e16ff2fec1af3234a35a167fafec3a0f7daf1b52491ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 1e23892d8e91c1dd31dadd98c230a65b444fb9e5ab07709d076b58bfa1f9ea07
[INFO] running `Command { std: "docker" "start" "-a" "1e23892d8e91c1dd31dadd98c230a65b444fb9e5ab07709d076b58bfa1f9ea07", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.12.11
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking smallvec v1.11.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking unindent v0.1.11
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking lock_api v0.4.10
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling pyo3-build-config v0.19.2
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling pyo3-ffi v0.19.2
[INFO] [stderr]    Compiling pyo3 v0.19.2
[INFO] [stderr]    Compiling pyo3-macros-backend v0.19.2
[INFO] [stderr]    Compiling pyo3-macros v0.19.2
[INFO] [stderr]     Checking dns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.78s
[INFO] running `Command { std: "docker" "inspect" "1e23892d8e91c1dd31dadd98c230a65b444fb9e5ab07709d076b58bfa1f9ea07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e23892d8e91c1dd31dadd98c230a65b444fb9e5ab07709d076b58bfa1f9ea07", kill_on_drop: false }`
[INFO] [stdout] 1e23892d8e91c1dd31dadd98c230a65b444fb9e5ab07709d076b58bfa1f9ea07