[INFO] cloning repository https://github.com/liteprotocol/mpc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/liteprotocol/mpc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fliteprotocol%2Fmpc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fliteprotocol%2Fmpc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 995422ba3e170deb76c4dea629734b2068c3a2cd
[INFO] checking liteprotocol/mpc against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fliteprotocol%2Fmpc" "/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/liteprotocol/mpc 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/liteprotocol/mpc
[INFO] finished tweaking git repo https://github.com/liteprotocol/mpc
[INFO] tweaked toml for git repo https://github.com/liteprotocol/mpc written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/liteprotocol/mpc 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]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/zcash-hackworks/sapling-crypto`
[INFO] [stderr]     Updating git repository `https://github.com/gtank/blake2-rfc`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 7 packages
[INFO] [stderr]       Adding gcc v0.3.55
[INFO] [stderr]     Updating libc v0.2.40 -> v0.2.153
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rust-crypto v0.2.36
[INFO] [stderr]       Adding rustc-serialize v0.3.25
[INFO] [stderr]       Adding time v0.1.45 (latest: v0.3.34)
[INFO] [stderr]       Adding wasi v0.10.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-hack-impl v0.4.0
[INFO] [stderr]   Downloaded phase2 v0.2.2
[INFO] [stderr]   Downloaded proc-macro-hack v0.4.0
[INFO] [stderr]   Downloaded hex-literal-impl v0.1.1
[INFO] [stderr]   Downloaded hex-literal v0.1.1
[INFO] [stderr]   Downloaded bellman v0.1.0
[INFO] [stderr]   Downloaded pairing v0.14.2
[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] 7542be34bd4d893037af3000f71e74478987be62b0075fee83097700d86161e8
[INFO] running `Command { std: "docker" "start" "-a" "7542be34bd4d893037af3000f71e74478987be62b0075fee83097700d86161e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7542be34bd4d893037af3000f71e74478987be62b0075fee83097700d86161e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7542be34bd4d893037af3000f71e74478987be62b0075fee83097700d86161e8", kill_on_drop: false }`
[INFO] [stdout] 7542be34bd4d893037af3000f71e74478987be62b0075fee83097700d86161e8
[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] 0a40e5ed8b8aaa74d8580c83dff28cf7a7f1159c48a95d3c3c3ee0d04d002bfa
[INFO] running `Command { std: "docker" "start" "-a" "0a40e5ed8b8aaa74d8580c83dff28cf7a7f1159c48a95d3c3c3ee0d04d002bfa", kill_on_drop: false }`
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking futures v0.1.21
[INFO] [stderr]     Checking constant_time_eq v0.1.3
[INFO] [stderr]     Checking crossbeam v0.3.2
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking pairing v0.14.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking bellman v0.1.0
[INFO] [stderr]     Checking phase2 v0.2.2
[INFO] [stderr]     Checking sapling-mpc v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.46s
[INFO] running `Command { std: "docker" "inspect" "0a40e5ed8b8aaa74d8580c83dff28cf7a7f1159c48a95d3c3c3ee0d04d002bfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a40e5ed8b8aaa74d8580c83dff28cf7a7f1159c48a95d3c3c3ee0d04d002bfa", kill_on_drop: false }`
[INFO] [stdout] 0a40e5ed8b8aaa74d8580c83dff28cf7a7f1159c48a95d3c3c3ee0d04d002bfa
[INFO] checking liteprotocol/mpc against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fliteprotocol%2Fmpc" "/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/liteprotocol/mpc 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/liteprotocol/mpc
[INFO] finished tweaking git repo https://github.com/liteprotocol/mpc
[INFO] tweaked toml for git repo https://github.com/liteprotocol/mpc written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/liteprotocol/mpc 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] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages
[INFO] [stderr]       Adding gcc v0.3.55
[INFO] [stderr]     Updating libc v0.2.40 -> v0.2.153
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rust-crypto v0.2.36
[INFO] [stderr]       Adding rustc-serialize v0.3.25
[INFO] [stderr]       Adding time v0.1.45 (latest: v0.3.34)
[INFO] [stderr]       Adding wasi v0.10.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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] 929a416d68d857324cbbed24818c2fc246cad566bb81576359cd9b65b021fa0a
[INFO] running `Command { std: "docker" "start" "-a" "929a416d68d857324cbbed24818c2fc246cad566bb81576359cd9b65b021fa0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "929a416d68d857324cbbed24818c2fc246cad566bb81576359cd9b65b021fa0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "929a416d68d857324cbbed24818c2fc246cad566bb81576359cd9b65b021fa0a", kill_on_drop: false }`
[INFO] [stdout] 929a416d68d857324cbbed24818c2fc246cad566bb81576359cd9b65b021fa0a
[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] 587e62bf8c4083bdacc6324a48c6ec6d70f2e954417cb290669b89507fd33917
[INFO] running `Command { std: "docker" "start" "-a" "587e62bf8c4083bdacc6324a48c6ec6d70f2e954417cb290669b89507fd33917", kill_on_drop: false }`
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking futures v0.1.21
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking constant_time_eq v0.1.3
[INFO] [stderr]     Checking crossbeam v0.3.2
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking pairing v0.14.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking bellman v0.1.0
[INFO] [stderr]     Checking phase2 v0.2.2
[INFO] [stderr]     Checking sapling-mpc v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.04s
[INFO] running `Command { std: "docker" "inspect" "587e62bf8c4083bdacc6324a48c6ec6d70f2e954417cb290669b89507fd33917", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "587e62bf8c4083bdacc6324a48c6ec6d70f2e954417cb290669b89507fd33917", kill_on_drop: false }`
[INFO] [stdout] 587e62bf8c4083bdacc6324a48c6ec6d70f2e954417cb290669b89507fd33917