[INFO] fetching crate file_scanner 0.2.0...
[INFO] checking file_scanner-0.2.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate file_scanner 0.2.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate file_scanner 0.2.0 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] started tweaking crates.io crate file_scanner 0.2.0
[INFO] finished tweaking crates.io crate file_scanner 0.2.0
[INFO] tweaked toml for crates.io crate file_scanner 0.2.0 written to /workspace/builds/worker-1-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]     Updating crates.io index
[INFO] [stderr]      Locking 29 packages to latest compatible versions
[INFO] [stderr]       Adding aho-corasick v0.6.10 (available: v1.1.3)
[INFO] [stderr]       Adding buf_redux v0.6.3 (available: v0.8.4)
[INFO] [stderr]       Adding memchr v1.0.2 (available: v2.7.4)
[INFO] [stderr]       Adding num v0.1.42 (available: v0.4.3)
[INFO] [stderr]       Adding num-bigint v0.1.44 (available: v0.4.6)
[INFO] [stderr]       Adding num-complex v0.1.43 (available: v0.4.6)
[INFO] [stderr]       Adding num-rational v0.1.42 (available: v0.4.2)
[INFO] [stderr]       Adding rand v0.4.6 (available: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (available: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (available: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (available: v0.8.3)
[INFO] [stderr]       Adding regex v0.2.11 (available: v1.10.6)
[INFO] [stderr]       Adding regex-syntax v0.5.6 (available: v0.8.4)
[INFO] [stderr]       Adding safemem v0.2.0 (available: v0.3.3)
[INFO] [stderr]       Adding thread_local v0.3.6 (available: v1.1.8)
[INFO] [stderr]       Adding ucd-util v0.1.10 (available: v0.2.1)
[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] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f641fd0fd3ee110716352177401227a6c3db5fe6850fde45756227c5ec3e52ff
[INFO] running `Command { std: "docker" "start" "-a" "f641fd0fd3ee110716352177401227a6c3db5fe6850fde45756227c5ec3e52ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f641fd0fd3ee110716352177401227a6c3db5fe6850fde45756227c5ec3e52ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f641fd0fd3ee110716352177401227a6c3db5fe6850fde45756227c5ec3e52ff", kill_on_drop: false }`
[INFO] [stdout] f641fd0fd3ee110716352177401227a6c3db5fe6850fde45756227c5ec3e52ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 8b1b12102396a66a928286b9eed8e4fb6ecefab09d53ad5bd4245bd7b65b530f
[INFO] running `Command { std: "docker" "start" "-a" "8b1b12102396a66a928286b9eed8e4fb6ecefab09d53ad5bd4245bd7b65b530f", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking ucd-util v0.1.10
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking utf8-ranges v1.0.5
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking buf_redux v0.6.3
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking file_scanner v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.30s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: num-bigint v0.1.44, num-complex v0.1.43, num-rational v0.1.42
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "8b1b12102396a66a928286b9eed8e4fb6ecefab09d53ad5bd4245bd7b65b530f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b1b12102396a66a928286b9eed8e4fb6ecefab09d53ad5bd4245bd7b65b530f", kill_on_drop: false }`
[INFO] [stdout] 8b1b12102396a66a928286b9eed8e4fb6ecefab09d53ad5bd4245bd7b65b530f