[INFO] updating cached repository https://github.com/museun/whatfeatures
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 690ce72ec1233887f8a06f52221eefaf1838b2f3
[INFO] checking museun/whatfeatures against master#339f574809bf8e4166b8de3cdbe7df181d37af3d for pr-71896
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Fwhatfeatures" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/museun/whatfeatures on toolchain 339f574809bf8e4166b8de3cdbe7df181d37af3d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+339f574809bf8e4166b8de3cdbe7df181d37af3d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/museun/whatfeatures
[INFO] finished tweaking git repo https://github.com/museun/whatfeatures
[INFO] tweaked toml for git repo https://github.com/museun/whatfeatures written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/museun/whatfeatures already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+339f574809bf8e4166b8de3cdbe7df181d37af3d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "/opt/rustwide/cargo-home/bin/cargo" "+339f574809bf8e4166b8de3cdbe7df181d37af3d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 412cbce84279c5efe143580320ad01c3574d310102f5fc22525a2a966f0c2bf5
[INFO] running `"docker" "start" "-a" "412cbce84279c5efe143580320ad01c3574d310102f5fc22525a2a966f0c2bf5"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking openssl-probe v0.1.2
[INFO] [stderr]     Checking rle-decode-fast v1.0.1
[INFO] [stderr]    Compiling cargo-whatfeatures v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]    Compiling openssl-sys v0.9.53
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking lexical_bool v0.1.3
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking libflate v0.1.27
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]    Compiling openssl v0.10.26
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.103
[INFO] [stderr]    Compiling thiserror-impl v1.0.9
[INFO] [stderr]    Compiling structopt-derive v0.3.5
[INFO] [stderr]     Checking thiserror v1.0.9
[INFO] [stderr]     Checking structopt v0.3.5
[INFO] [stderr]     Checking serde v1.0.103
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking attohttpc v0.6.0
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/output/text.rs:422:9
[INFO] [stderr]     |
[INFO] [stderr] 422 |         std::mem::replace(self, Default::default());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/output/text.rs:427:9
[INFO] [stderr]     |
[INFO] [stderr] 427 |         std::mem::replace(self, State::Next);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/output/text.rs:422:9
[INFO] [stderr]     |
[INFO] [stderr] 422 |         std::mem::replace(self, Default::default());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/output/text.rs:427:9
[INFO] [stderr]     |
[INFO] [stderr] 427 |         std::mem::replace(self, State::Next);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 17s
[INFO] running `"docker" "inspect" "412cbce84279c5efe143580320ad01c3574d310102f5fc22525a2a966f0c2bf5"`
[INFO] running `"docker" "rm" "-f" "412cbce84279c5efe143580320ad01c3574d310102f5fc22525a2a966f0c2bf5"`
[INFO] [stdout] 412cbce84279c5efe143580320ad01c3574d310102f5fc22525a2a966f0c2bf5