[INFO] updating cached repository https://github.com/elderfd/genedrop_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3440a8f00e9d4a358e44f6f9045c86649e02f5f4
[INFO] checking elderfd/genedrop_rust against master#c724b67e1b474262917a5154d74e7072267593fe for pr-74315
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felderfd%2Fgenedrop_rust" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/elderfd/genedrop_rust on toolchain c724b67e1b474262917a5154d74e7072267593fe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/elderfd/genedrop_rust
[INFO] finished tweaking git repo https://github.com/elderfd/genedrop_rust
[INFO] tweaked toml for git repo https://github.com/elderfd/genedrop_rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/elderfd/genedrop_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bceb35ed470f004a1e471776c6ac6de6d6f6493f7b118e5244ad7d4fadfd796f
[INFO] running `Command { std: "docker" "start" "-a" "bceb35ed470f004a1e471776c6ac6de6d6f6493f7b118e5244ad7d4fadfd796f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bceb35ed470f004a1e471776c6ac6de6d6f6493f7b118e5244ad7d4fadfd796f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bceb35ed470f004a1e471776c6ac6de6d6f6493f7b118e5244ad7d4fadfd796f", kill_on_drop: false }`
[INFO] [stdout] bceb35ed470f004a1e471776c6ac6de6d6f6493f7b118e5244ad7d4fadfd796f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ec25fa4e26431882e374e6379bb5feabe79aa51ce3a0067147f702f488135e3
[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" "8ec25fa4e26431882e374e6379bb5feabe79aa51ce3a0067147f702f488135e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]    Compiling readonly v0.1.5
[INFO] [stderr]     Checking genedrop_core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: static variable `new_uuid` should have an upper case name
[INFO] [stdout]  --> src/individual.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | static new_uuid: fn() -> Uuid = Uuid::new_v4;
[INFO] [stdout]   |        ^^^^^^^^ help: convert the identifier to upper case: `NEW_UUID`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `new_uuid` should have an upper case name
[INFO] [stdout]  --> src/individual.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | static new_uuid: fn() -> Uuid = Uuid::new_v4;
[INFO] [stdout]   |        ^^^^^^^^ help: convert the identifier to upper case: `NEW_UUID`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.65s
[INFO] running `Command { std: "docker" "inspect" "8ec25fa4e26431882e374e6379bb5feabe79aa51ce3a0067147f702f488135e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ec25fa4e26431882e374e6379bb5feabe79aa51ce3a0067147f702f488135e3", kill_on_drop: false }`
[INFO] [stdout] 8ec25fa4e26431882e374e6379bb5feabe79aa51ce3a0067147f702f488135e3