[INFO] cloning repository https://github.com/mixlayer/mixlayer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mixlayer/mixlayer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmixlayer%2Fmixlayer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmixlayer%2Fmixlayer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 697146f2c1540764e2e242aee75d470aea6bb9c9
[INFO] checking mixlayer/mixlayer against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmixlayer%2Fmixlayer" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mixlayer/mixlayer 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/mixlayer/mixlayer
[INFO] finished tweaking git repo https://github.com/mixlayer/mixlayer
[INFO] tweaked toml for git repo https://github.com/mixlayer/mixlayer written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mixlayer/mixlayer 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]  Downloading crates ...
[INFO] [stderr]   Downloaded which v4.3.0
[INFO] [stderr]   Downloaded prost-derive v0.11.0
[INFO] [stderr]   Downloaded prost-build v0.11.1
[INFO] [stderr]   Downloaded prost v0.11.0
[INFO] [stderr]   Downloaded prost-types v0.11.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 20546701786ba62c46bb9c0dd1e6be12971cbd190db88db60163da528d86996b
[INFO] running `Command { std: "docker" "start" "-a" "20546701786ba62c46bb9c0dd1e6be12971cbd190db88db60163da528d86996b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20546701786ba62c46bb9c0dd1e6be12971cbd190db88db60163da528d86996b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20546701786ba62c46bb9c0dd1e6be12971cbd190db88db60163da528d86996b", kill_on_drop: false }`
[INFO] [stdout] 20546701786ba62c46bb9c0dd1e6be12971cbd190db88db60163da528d86996b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 31316889c138c399eb5654d3dab9c00215bf87bef8f5d6ac583947301e9c8496
[INFO] running `Command { std: "docker" "start" "-a" "31316889c138c399eb5654d3dab9c00215bf87bef8f5d6ac583947301e9c8496", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.75
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling anyhow v1.0.66
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]     Checking itoa v1.0.4
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling multimap v0.8.3
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking ryu v1.0.11
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]    Compiling which v4.3.0
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v2.0.48
[INFO] [stderr]    Compiling regex v1.6.0
[INFO] [stderr]    Compiling petgraph v0.6.2
[INFO] [stderr]     Checking mixlayer-macros v0.1.0 (/opt/rustwide/workdir/lib-macros)
[INFO] [stderr]    Compiling prost-derive v0.11.0
[INFO] [stderr]    Compiling serde_derive v1.0.194
[INFO] [stderr]    Compiling prost v0.11.0
[INFO] [stderr]    Compiling prost-types v0.11.1
[INFO] [stderr]    Compiling prost-build v0.11.1
[INFO] [stderr]    Compiling mixlayer-runtime-ffi v0.1.0 (/opt/rustwide/workdir/runtime-ffi)
[INFO] [stderr]     Checking mixlayer-data v0.1.0 (/opt/rustwide/workdir/data)
[INFO] [stderr]     Checking mixlayer-graph v0.1.0 (/opt/rustwide/workdir/graph)
[INFO] [stderr]     Checking mixlayer v0.1.0 (/opt/rustwide/workdir/lib)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.90s
[INFO] running `Command { std: "docker" "inspect" "31316889c138c399eb5654d3dab9c00215bf87bef8f5d6ac583947301e9c8496", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31316889c138c399eb5654d3dab9c00215bf87bef8f5d6ac583947301e9c8496", kill_on_drop: false }`
[INFO] [stdout] 31316889c138c399eb5654d3dab9c00215bf87bef8f5d6ac583947301e9c8496
[INFO] checking mixlayer/mixlayer against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmixlayer%2Fmixlayer" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mixlayer/mixlayer 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/mixlayer/mixlayer
[INFO] finished tweaking git repo https://github.com/mixlayer/mixlayer
[INFO] tweaked toml for git repo https://github.com/mixlayer/mixlayer written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mixlayer/mixlayer 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] af3b2220725e941e40e2c9e4c3fc08a5c3b31c353e0074e35475f925d1588ac3
[INFO] running `Command { std: "docker" "start" "-a" "af3b2220725e941e40e2c9e4c3fc08a5c3b31c353e0074e35475f925d1588ac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af3b2220725e941e40e2c9e4c3fc08a5c3b31c353e0074e35475f925d1588ac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af3b2220725e941e40e2c9e4c3fc08a5c3b31c353e0074e35475f925d1588ac3", kill_on_drop: false }`
[INFO] [stdout] af3b2220725e941e40e2c9e4c3fc08a5c3b31c353e0074e35475f925d1588ac3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 7dbc61afdfb03f2c962c8f017a864b78ec3d172440069df7b45618b3ac95fcce
[INFO] running `Command { std: "docker" "start" "-a" "7dbc61afdfb03f2c962c8f017a864b78ec3d172440069df7b45618b3ac95fcce", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.75
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling anyhow v1.0.66
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]     Checking itoa v1.0.4
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stderr]     Checking ryu v1.0.11
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling multimap v0.8.3
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v2.0.48
[INFO] [stderr]    Compiling which v4.3.0
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling petgraph v0.6.2
[INFO] [stderr]    Compiling regex v1.6.0
[INFO] [stderr]     Checking mixlayer-macros v0.1.0 (/opt/rustwide/workdir/lib-macros)
[INFO] [stderr]    Compiling prost-derive v0.11.0
[INFO] [stderr]    Compiling serde_derive v1.0.194
[INFO] [stderr]    Compiling prost v0.11.0
[INFO] [stderr]    Compiling prost-types v0.11.1
[INFO] [stderr]    Compiling prost-build v0.11.1
[INFO] [stderr]    Compiling mixlayer-runtime-ffi v0.1.0 (/opt/rustwide/workdir/runtime-ffi)
[INFO] [stderr]     Checking mixlayer-data v0.1.0 (/opt/rustwide/workdir/data)
[INFO] [stderr]     Checking mixlayer-graph v0.1.0 (/opt/rustwide/workdir/graph)
[INFO] [stderr]     Checking mixlayer v0.1.0 (/opt/rustwide/workdir/lib)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.13s
[INFO] running `Command { std: "docker" "inspect" "7dbc61afdfb03f2c962c8f017a864b78ec3d172440069df7b45618b3ac95fcce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dbc61afdfb03f2c962c8f017a864b78ec3d172440069df7b45618b3ac95fcce", kill_on_drop: false }`
[INFO] [stdout] 7dbc61afdfb03f2c962c8f017a864b78ec3d172440069df7b45618b3ac95fcce