[INFO] fetching crate mqttrust 0.6.0...
[INFO] building mqttrust-0.6.0 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate mqttrust 0.6.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate mqttrust 0.6.0 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mqttrust 0.6.0
[INFO] finished tweaking crates.io crate mqttrust 0.6.0
[INFO] tweaked toml for crates.io crate mqttrust 0.6.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 27 packages to latest compatible versions
[INFO] [stderr]       Adding heapless v0.7.17 (available: v0.8.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5e6aa60d09989d97573403f0d6ad9d9fe31984d3fb6ef751a9d044ea79df77b
[INFO] running `Command { std: "docker" "start" "-a" "c5e6aa60d09989d97573403f0d6ad9d9fe31984d3fb6ef751a9d044ea79df77b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5e6aa60d09989d97573403f0d6ad9d9fe31984d3fb6ef751a9d044ea79df77b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5e6aa60d09989d97573403f0d6ad9d9fe31984d3fb6ef751a9d044ea79df77b", kill_on_drop: false }`
[INFO] [stdout] c5e6aa60d09989d97573403f0d6ad9d9fe31984d3fb6ef751a9d044ea79df77b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96547d4a29c9283c8986ac4f9510767827548957bff09c124be5ac014df0e164
[INFO] running `Command { std: "docker" "start" "-a" "96547d4a29c9283c8986ac4f9510767827548957bff09c124be5ac014df0e164", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.24
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling hash32 v0.2.1
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]    Compiling mqttrust v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `into_result` is never used
[INFO] [stdout]    --> src/fmt.rs:226:8
[INFO] [stdout]     |
[INFO] [stdout] 223 | pub trait Try {
[INFO] [stdout]     |           --- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 226 |     fn into_result(self) -> Result<Self::Ok, Self::Error>;
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "96547d4a29c9283c8986ac4f9510767827548957bff09c124be5ac014df0e164", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96547d4a29c9283c8986ac4f9510767827548957bff09c124be5ac014df0e164", kill_on_drop: false }`
[INFO] [stdout] 96547d4a29c9283c8986ac4f9510767827548957bff09c124be5ac014df0e164
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c425a9c748d90fe8d5e30b11eefc4c5c5a6507388c65433f6764a997f4347c35
[INFO] running `Command { std: "docker" "start" "-a" "c425a9c748d90fe8d5e30b11eefc4c5c5a6507388c65433f6764a997f4347c35", kill_on_drop: false }`
[INFO] [stderr]    Compiling mqttrust v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `into_result` is never used
[INFO] [stdout]    --> src/fmt.rs:226:8
[INFO] [stdout]     |
[INFO] [stdout] 223 | pub trait Try {
[INFO] [stdout]     |           --- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 226 |     fn into_result(self) -> Result<Self::Ok, Self::Error>;
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_result` is never used
[INFO] [stdout]    --> src/fmt.rs:226:8
[INFO] [stdout]     |
[INFO] [stdout] 223 | pub trait Try {
[INFO] [stdout]     |           --- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 226 |     fn into_result(self) -> Result<Self::Ok, Self::Error>;
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "c425a9c748d90fe8d5e30b11eefc4c5c5a6507388c65433f6764a997f4347c35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c425a9c748d90fe8d5e30b11eefc4c5c5a6507388c65433f6764a997f4347c35", kill_on_drop: false }`
[INFO] [stdout] c425a9c748d90fe8d5e30b11eefc4c5c5a6507388c65433f6764a997f4347c35