[INFO] cloning repository https://github.com/ToToSpl/r_matrix
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ToToSpl/r_matrix" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToToSpl%2Fr_matrix", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToToSpl%2Fr_matrix'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9cb0988757b02026d8a203ee3dfc970e1e5875eb
[INFO] checking ToToSpl/r_matrix against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToToSpl%2Fr_matrix" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ToToSpl/r_matrix 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/ToToSpl/r_matrix
[INFO] finished tweaking git repo https://github.com/ToToSpl/r_matrix
[INFO] tweaked toml for git repo https://github.com/ToToSpl/r_matrix written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ToToSpl/r_matrix 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 ctrlc v3.2.3
[INFO] [stderr]   Downloaded nix v0.25.0
[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] 35e40d4e798a130026fe1bcf75431fa5810e105e5c23a3b01dbbab246beb7540
[INFO] running `Command { std: "docker" "start" "-a" "35e40d4e798a130026fe1bcf75431fa5810e105e5c23a3b01dbbab246beb7540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35e40d4e798a130026fe1bcf75431fa5810e105e5c23a3b01dbbab246beb7540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35e40d4e798a130026fe1bcf75431fa5810e105e5c23a3b01dbbab246beb7540", kill_on_drop: false }`
[INFO] [stdout] 35e40d4e798a130026fe1bcf75431fa5810e105e5c23a3b01dbbab246beb7540
[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] 3ee1e92a0e7f4a570339f13d831ce385756bb80b270557fab57a56fe3c8d9334
[INFO] running `Command { std: "docker" "start" "-a" "3ee1e92a0e7f4a570339f13d831ce385756bb80b270557fab57a56fe3c8d9334", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.131
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking nix v0.25.0
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ctrlc v3.2.3
[INFO] [stderr]     Checking r_matrix v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.65s
[INFO] running `Command { std: "docker" "inspect" "3ee1e92a0e7f4a570339f13d831ce385756bb80b270557fab57a56fe3c8d9334", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ee1e92a0e7f4a570339f13d831ce385756bb80b270557fab57a56fe3c8d9334", kill_on_drop: false }`
[INFO] [stdout] 3ee1e92a0e7f4a570339f13d831ce385756bb80b270557fab57a56fe3c8d9334
[INFO] checking ToToSpl/r_matrix against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToToSpl%2Fr_matrix" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ToToSpl/r_matrix 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/ToToSpl/r_matrix
[INFO] finished tweaking git repo https://github.com/ToToSpl/r_matrix
[INFO] tweaked toml for git repo https://github.com/ToToSpl/r_matrix written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ToToSpl/r_matrix 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] a8536f7d0e8418f3095ee9e83a3af4b821e8bcbd20be030982fab8298d3fe361
[INFO] running `Command { std: "docker" "start" "-a" "a8536f7d0e8418f3095ee9e83a3af4b821e8bcbd20be030982fab8298d3fe361", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8536f7d0e8418f3095ee9e83a3af4b821e8bcbd20be030982fab8298d3fe361", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8536f7d0e8418f3095ee9e83a3af4b821e8bcbd20be030982fab8298d3fe361", kill_on_drop: false }`
[INFO] [stdout] a8536f7d0e8418f3095ee9e83a3af4b821e8bcbd20be030982fab8298d3fe361
[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] 551ff6b32cbfdb8b0a38e800f0b7be4f2472eb2e737a5803fd6767ec2c2438ac
[INFO] running `Command { std: "docker" "start" "-a" "551ff6b32cbfdb8b0a38e800f0b7be4f2472eb2e737a5803fd6767ec2c2438ac", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.131
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking nix v0.25.0
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ctrlc v3.2.3
[INFO] [stderr]     Checking r_matrix v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.36s
[INFO] running `Command { std: "docker" "inspect" "551ff6b32cbfdb8b0a38e800f0b7be4f2472eb2e737a5803fd6767ec2c2438ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "551ff6b32cbfdb8b0a38e800f0b7be4f2472eb2e737a5803fd6767ec2c2438ac", kill_on_drop: false }`
[INFO] [stdout] 551ff6b32cbfdb8b0a38e800f0b7be4f2472eb2e737a5803fd6767ec2c2438ac