[INFO] fetching crate prolog_parser 0.8.68...
[INFO] checking prolog_parser-0.8.68 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate prolog_parser 0.8.68 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate prolog_parser 0.8.68 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 prolog_parser 0.8.68
[INFO] finished tweaking crates.io crate prolog_parser 0.8.68
[INFO] tweaked toml for crates.io crate prolog_parser 0.8.68 written to /workspace/builds/worker-5-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 38 packages to latest compatible versions
[INFO] [stderr]       Adding arrayvec v0.4.12 (available: v0.7.6)
[INFO] [stderr]       Adding cfg-if v0.1.10 (available: v1.0.0)
[INFO] [stderr]       Adding lexical v2.2.4 (available: v7.0.2)
[INFO] [stderr]       Adding lexical-core v0.4.8 (available: v1.0.2)
[INFO] [stderr]       Adding num-bigint v0.2.6 (available: v0.4.6)
[INFO] [stderr]       Adding num-rational v0.2.4 (available: v0.4.2)
[INFO] [stderr]       Adding num-traits v0.1.43 (available: v0.2.19)
[INFO] [stderr]       Adding ordered-float v0.5.2 (available: v4.3.0)
[INFO] [stderr]       Adding rustc_version v0.2.3 (available: v0.4.1)
[INFO] [stderr]       Adding semver v0.9.0 (available: v1.0.23)
[INFO] [stderr]       Adding semver-parser v0.7.0 (available: v0.10.2)
[INFO] [stderr]       Adding static_assertions v0.3.4 (available: v1.1.0)
[INFO] [stderr]       Adding windows-sys v0.52.0 (available: v0.59.0)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] bdc20edefcae29ecc6f9a7112ac819435eaa92281cdf2db048c4f959ce63c206
[INFO] running `Command { std: "docker" "start" "-a" "bdc20edefcae29ecc6f9a7112ac819435eaa92281cdf2db048c4f959ce63c206", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bdc20edefcae29ecc6f9a7112ac819435eaa92281cdf2db048c4f959ce63c206", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdc20edefcae29ecc6f9a7112ac819435eaa92281cdf2db048c4f959ce63c206", kill_on_drop: false }`
[INFO] [stdout] bdc20edefcae29ecc6f9a7112ac819435eaa92281cdf2db048c4f959ce63c206
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] b2526fd54fc1d6094c15d82969760f46a68c7083d533b4c64e24e6b3af25350d
[INFO] running `Command { std: "docker" "start" "-a" "b2526fd54fc1d6094c15d82969760f46a68c7083d533b4c64e24e6b3af25350d", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.4
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling rug v1.26.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking unicode-segmentation v1.12.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling lexical-core v0.4.8
[INFO] [stderr]    Compiling lexical v2.2.4
[INFO] [stderr]     Checking unicode_reader v1.0.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking ordered-float v0.5.2
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "b2526fd54fc1d6094c15d82969760f46a68c7083d533b4c64e24e6b3af25350d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2526fd54fc1d6094c15d82969760f46a68c7083d533b4c64e24e6b3af25350d", kill_on_drop: false }`
[INFO] [stdout] b2526fd54fc1d6094c15d82969760f46a68c7083d533b4c64e24e6b3af25350d