[INFO] fetching crate mc-build-rs 0.1.0...
[INFO] checking mc-build-rs-0.1.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate mc-build-rs 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate mc-build-rs 0.1.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate mc-build-rs 0.1.0
[INFO] finished tweaking crates.io crate mc-build-rs 0.1.0
[INFO] tweaked toml for crates.io crate mc-build-rs 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 67 packages to latest compatible versions
[INFO] [stderr]       Adding float-cmp v0.9.0 (available: v0.10.0)
[INFO] [stderr]       Adding idna v0.5.0 (available: v1.0.2)
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.13.0)
[INFO] [stderr]       Adding mockall v0.11.4 (available: v0.13.0)
[INFO] [stderr]       Adding mockall_derive v0.11.4 (available: v0.13.0)
[INFO] [stderr]       Adding predicates v2.1.5 (available: v3.1.2)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.77)
[INFO] [stderr]       Adding termtree v0.4.1 (available: v0.5.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b48f6d3815f3b434424a036bd01de1235e47f5d59172fbe3f35f338b226a85a4
[INFO] running `Command { std: "docker" "start" "-a" "b48f6d3815f3b434424a036bd01de1235e47f5d59172fbe3f35f338b226a85a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b48f6d3815f3b434424a036bd01de1235e47f5d59172fbe3f35f338b226a85a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b48f6d3815f3b434424a036bd01de1235e47f5d59172fbe3f35f338b226a85a4", kill_on_drop: false }`
[INFO] [stdout] b48f6d3815f3b434424a036bd01de1235e47f5d59172fbe3f35f338b226a85a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2597f856027c14709da2cb31cc0b20f901976cf12d60a1ffdf3eceefeb1d2a3
[INFO] running `Command { std: "docker" "start" "-a" "d2597f856027c14709da2cb31cc0b20f901976cf12d60a1ffdf3eceefeb1d2a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking predicates-core v1.0.8
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking fragile v2.0.0
[INFO] [stderr]     Checking cargo-emit v0.2.1
[INFO] [stderr]     Checking downcast v0.11.0
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling mockall_double v0.3.1
[INFO] [stderr]     Checking temp-env v0.3.6
[INFO] [stderr]     Checking predicates-tree v1.0.11
[INFO] [stderr]     Checking mc-build-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking predicates v2.1.5
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking fluent-asserter v0.1.9
[INFO] [stderr]    Compiling mockall_derive v0.11.4
[INFO] [stderr]     Checking mockall v0.11.4
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.56s
[INFO] running `Command { std: "docker" "inspect" "d2597f856027c14709da2cb31cc0b20f901976cf12d60a1ffdf3eceefeb1d2a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2597f856027c14709da2cb31cc0b20f901976cf12d60a1ffdf3eceefeb1d2a3", kill_on_drop: false }`
[INFO] [stdout] d2597f856027c14709da2cb31cc0b20f901976cf12d60a1ffdf3eceefeb1d2a3