[INFO] cloning repository https://github.com/tiagocoutinho/modbus-proxy-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tiagocoutinho/modbus-proxy-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagocoutinho%2Fmodbus-proxy-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagocoutinho%2Fmodbus-proxy-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4903ea9fb5fdbadc9b60e669f9f54ce31435237d
[INFO] checking tiagocoutinho/modbus-proxy-rs against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagocoutinho%2Fmodbus-proxy-rs" "/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/tiagocoutinho/modbus-proxy-rs 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/tiagocoutinho/modbus-proxy-rs
[INFO] finished tweaking git repo https://github.com/tiagocoutinho/modbus-proxy-rs
[INFO] tweaked toml for git repo https://github.com/tiagocoutinho/modbus-proxy-rs written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tiagocoutinho/modbus-proxy-rs 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] 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] d8853ffa0186414bfc6d69e13d70c885c5d9dfa8878e58bb7748f46aafdebc54
[INFO] running `Command { std: "docker" "start" "-a" "d8853ffa0186414bfc6d69e13d70c885c5d9dfa8878e58bb7748f46aafdebc54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8853ffa0186414bfc6d69e13d70c885c5d9dfa8878e58bb7748f46aafdebc54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8853ffa0186414bfc6d69e13d70c885c5d9dfa8878e58bb7748f46aafdebc54", kill_on_drop: false }`
[INFO] [stdout] d8853ffa0186414bfc6d69e13d70c885c5d9dfa8878e58bb7748f46aafdebc54
[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] 79fa1220c2f63321d6ad3b9f4b20d88d99bcae94735123a567dcd85a3e9e4f55
[INFO] running `Command { std: "docker" "start" "-a" "79fa1220c2f63321d6ad3b9f4b20d88d99bcae94735123a567dcd85a3e9e4f55", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]    Compiling syn v1.0.83
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling futures-channel v0.3.19
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]     Checking futures-sink v0.3.19
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling serde_json v1.0.73
[INFO] [stderr]     Checking futures-io v0.3.19
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking rust-ini v0.13.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking serde-hjson v0.9.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling futures-macro v0.3.19
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking tokio v1.15.0
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking futures-executor v0.3.19
[INFO] [stderr]     Checking futures v0.3.19
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking config v0.11.0
[INFO] [stderr]     Checking modbus-proxy-rs v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.61s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v5.1.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "79fa1220c2f63321d6ad3b9f4b20d88d99bcae94735123a567dcd85a3e9e4f55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79fa1220c2f63321d6ad3b9f4b20d88d99bcae94735123a567dcd85a3e9e4f55", kill_on_drop: false }`
[INFO] [stdout] 79fa1220c2f63321d6ad3b9f4b20d88d99bcae94735123a567dcd85a3e9e4f55
[INFO] checking tiagocoutinho/modbus-proxy-rs against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagocoutinho%2Fmodbus-proxy-rs" "/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/tiagocoutinho/modbus-proxy-rs 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/tiagocoutinho/modbus-proxy-rs
[INFO] finished tweaking git repo https://github.com/tiagocoutinho/modbus-proxy-rs
[INFO] tweaked toml for git repo https://github.com/tiagocoutinho/modbus-proxy-rs written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/tiagocoutinho/modbus-proxy-rs 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] 943084e7d9bc0bcaef34dd36b44a8efad2674d633354054c1ababadc28f13a32
[INFO] running `Command { std: "docker" "start" "-a" "943084e7d9bc0bcaef34dd36b44a8efad2674d633354054c1ababadc28f13a32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "943084e7d9bc0bcaef34dd36b44a8efad2674d633354054c1ababadc28f13a32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "943084e7d9bc0bcaef34dd36b44a8efad2674d633354054c1ababadc28f13a32", kill_on_drop: false }`
[INFO] [stdout] 943084e7d9bc0bcaef34dd36b44a8efad2674d633354054c1ababadc28f13a32
[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] db3a725a3d6b92cefcdd6156f58604b46ec231da4f598d61093ad2ca2dc6e0f8
[INFO] running `Command { std: "docker" "start" "-a" "db3a725a3d6b92cefcdd6156f58604b46ec231da4f598d61093ad2ca2dc6e0f8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]    Compiling syn v1.0.83
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling futures-channel v0.3.19
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]     Checking futures-sink v0.3.19
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking futures-io v0.3.19
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling serde_json v1.0.73
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking rust-ini v0.13.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking serde-hjson v0.9.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling futures-macro v0.3.19
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]     Checking tokio v1.15.0
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking futures-executor v0.3.19
[INFO] [stderr]     Checking futures v0.3.19
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking config v0.11.0
[INFO] [stderr]     Checking modbus-proxy-rs v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.74s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v5.1.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "db3a725a3d6b92cefcdd6156f58604b46ec231da4f598d61093ad2ca2dc6e0f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db3a725a3d6b92cefcdd6156f58604b46ec231da4f598d61093ad2ca2dc6e0f8", kill_on_drop: false }`
[INFO] [stdout] db3a725a3d6b92cefcdd6156f58604b46ec231da4f598d61093ad2ca2dc6e0f8