[INFO] fetching crate simple-matrix 0.1.2...
[INFO] checking simple-matrix-0.1.2 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate simple-matrix 0.1.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate simple-matrix 0.1.2 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple-matrix 0.1.2
[INFO] finished tweaking crates.io crate simple-matrix 0.1.2
[INFO] tweaked toml for crates.io crate simple-matrix 0.1.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: the cargo feature `edition` has been stabilized in the 1.31 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/nightly/cargo/reference/manifest.html#the-edition-field for more information about using this feature.
[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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7671a824d10fe5cddaaf40fd7bd56993a87f3bbab37443d6ce6cb81fec022fd7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7671a824d10fe5cddaaf40fd7bd56993a87f3bbab37443d6ce6cb81fec022fd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7671a824d10fe5cddaaf40fd7bd56993a87f3bbab37443d6ce6cb81fec022fd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7671a824d10fe5cddaaf40fd7bd56993a87f3bbab37443d6ce6cb81fec022fd7", kill_on_drop: false }`
[INFO] [stdout] 7671a824d10fe5cddaaf40fd7bd56993a87f3bbab37443d6ce6cb81fec022fd7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30cb7512be84dca6a94590858dd8340cb133eb9cce6b45d9e392954d8d4e7b6e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "30cb7512be84dca6a94590858dd8340cb133eb9cce6b45d9e392954d8d4e7b6e", kill_on_drop: false }`
[INFO] [stderr] warning: the cargo feature `edition` has been stabilized in the 1.31 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/nightly/cargo/reference/manifest.html#the-edition-field for more information about using this feature.
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]     Checking simple-matrix v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking quickcheck v0.6.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling cast v0.2.5
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.67s
[INFO] running `Command { std: "docker" "inspect" "30cb7512be84dca6a94590858dd8340cb133eb9cce6b45d9e392954d8d4e7b6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30cb7512be84dca6a94590858dd8340cb133eb9cce6b45d9e392954d8d4e7b6e", kill_on_drop: false }`
[INFO] [stdout] 30cb7512be84dca6a94590858dd8340cb133eb9cce6b45d9e392954d8d4e7b6e