[INFO] cloning repository https://github.com/sd2k/dc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sd2k/dc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsd2k%2Fdc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsd2k%2Fdc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] acbb8a6664a2b7351c436a331a818901355e3d89
[INFO] checking sd2k/dc against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsd2k%2Fdc" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sd2k/dc 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/sd2k/dc
[INFO] finished tweaking git repo https://github.com/sd2k/dc
[INFO] tweaked toml for git repo https://github.com/sd2k/dc written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sd2k/dc 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3aa2fe60a99443871077b6bb79af6689e51d7c4960b36e3e61c7f84435d9a0bd
[INFO] running `Command { std: "docker" "start" "-a" "3aa2fe60a99443871077b6bb79af6689e51d7c4960b36e3e61c7f84435d9a0bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3aa2fe60a99443871077b6bb79af6689e51d7c4960b36e3e61c7f84435d9a0bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3aa2fe60a99443871077b6bb79af6689e51d7c4960b36e3e61c7f84435d9a0bd", kill_on_drop: false }`
[INFO] [stdout] 3aa2fe60a99443871077b6bb79af6689e51d7c4960b36e3e61c7f84435d9a0bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 6752674ef6387c25f431c7d5610bad8fb9ac34657be80165fa2b3cdf42a1bca7
[INFO] running `Command { std: "docker" "start" "-a" "6752674ef6387c25f431c7d5610bad8fb9ac34657be80165fa2b3cdf42a1bca7", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking tracing-core v0.1.19
[INFO] [stderr]     Checking sharded-slab v0.1.3
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]    Compiling eyre v0.6.5
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]     Checking rustc-demangle v0.1.20
[INFO] [stderr]     Checking owo-colors v1.3.0
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking indenter v0.3.3
[INFO] [stderr]     Checking object v0.26.1
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking tracing-subscriber v0.2.20
[INFO] [stderr]     Checking tracing-error v0.1.2
[INFO] [stderr]     Checking color-spantrace v0.1.6
[INFO] [stderr]     Checking color-eyre v0.5.11
[INFO] [stderr]     Checking dc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.55s
[INFO] running `Command { std: "docker" "inspect" "6752674ef6387c25f431c7d5610bad8fb9ac34657be80165fa2b3cdf42a1bca7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6752674ef6387c25f431c7d5610bad8fb9ac34657be80165fa2b3cdf42a1bca7", kill_on_drop: false }`
[INFO] [stdout] 6752674ef6387c25f431c7d5610bad8fb9ac34657be80165fa2b3cdf42a1bca7
[INFO] checking sd2k/dc against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsd2k%2Fdc" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sd2k/dc 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/sd2k/dc
[INFO] finished tweaking git repo https://github.com/sd2k/dc
[INFO] tweaked toml for git repo https://github.com/sd2k/dc written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/sd2k/dc 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 7df5eb6d038606ddcf75ab89d7e8591972a08508a5c4b76e603cd66716f92906
[INFO] running `Command { std: "docker" "start" "-a" "7df5eb6d038606ddcf75ab89d7e8591972a08508a5c4b76e603cd66716f92906", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7df5eb6d038606ddcf75ab89d7e8591972a08508a5c4b76e603cd66716f92906", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7df5eb6d038606ddcf75ab89d7e8591972a08508a5c4b76e603cd66716f92906", kill_on_drop: false }`
[INFO] [stdout] 7df5eb6d038606ddcf75ab89d7e8591972a08508a5c4b76e603cd66716f92906
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 46d9705735d824210da0d0f3ac535edb1ced7a6cfb32026d5306bf7c41fdc87b
[INFO] running `Command { std: "docker" "start" "-a" "46d9705735d824210da0d0f3ac535edb1ced7a6cfb32026d5306bf7c41fdc87b", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking tracing-core v0.1.19
[INFO] [stderr]     Checking sharded-slab v0.1.3
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling eyre v0.6.5
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking indenter v0.3.3
[INFO] [stderr]     Checking owo-colors v1.3.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking rustc-demangle v0.1.20
[INFO] [stderr]     Checking object v0.26.1
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking tracing-subscriber v0.2.20
[INFO] [stderr]     Checking tracing-error v0.1.2
[INFO] [stderr]     Checking color-spantrace v0.1.6
[INFO] [stderr]     Checking color-eyre v0.5.11
[INFO] [stderr]     Checking dc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.09s
[INFO] running `Command { std: "docker" "inspect" "46d9705735d824210da0d0f3ac535edb1ced7a6cfb32026d5306bf7c41fdc87b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46d9705735d824210da0d0f3ac535edb1ced7a6cfb32026d5306bf7c41fdc87b", kill_on_drop: false }`
[INFO] [stdout] 46d9705735d824210da0d0f3ac535edb1ced7a6cfb32026d5306bf7c41fdc87b