[INFO] updating cached repository https://github.com/jaroslaw-weber/learn-korean-tools
[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] 6d7c879950bb102405f8f2ff92a538691292c7c7
[INFO] testing jaroslaw-weber/learn-korean-tools against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaroslaw-weber%2Flearn-korean-tools" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jaroslaw-weber/learn-korean-tools on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jaroslaw-weber/learn-korean-tools
[INFO] finished tweaking git repo https://github.com/jaroslaw-weber/learn-korean-tools
[INFO] tweaked toml for git repo https://github.com/jaroslaw-weber/learn-korean-tools written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jaroslaw-weber/learn-korean-tools already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-3/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c3e20b6b5e48762c958402401a937731a4590f34dbc7355044563fb37987cfeb
[INFO] running `"docker" "start" "-a" "c3e20b6b5e48762c958402401a937731a4590f34dbc7355044563fb37987cfeb"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling smallvec v1.4.0
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling yansi v0.3.4
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling itoa v0.3.4
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling dtoa v0.4.5
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling state v0.2.2
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling hex v0.2.0
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling pest v0.4.1
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling phf_shared v0.7.21
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling term-painter v0.2.4
[INFO] [stderr]    Compiling rocket v0.2.11
[INFO] [stderr]    Compiling rocket_codegen v0.2.11
[INFO] [stderr]    Compiling unicode-normalization v0.1.12
[INFO] [stderr]    Compiling phf v0.7.21
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling stringprep v0.1.2
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling base64 v0.6.0
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.36
[INFO] [stderr]    Compiling bstr v0.2.12
[INFO] [stderr]    Compiling generic-array v0.9.0
[INFO] [stderr]    Compiling digest v0.7.6
[INFO] [stderr]    Compiling crypto-mac v0.5.2
[INFO] [stderr]    Compiling sha2 v0.7.1
[INFO] [stderr]    Compiling hmac v0.5.0
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling serde_json v0.9.10
[INFO] [stderr]    Compiling postgres-protocol v0.3.2
[INFO] [stderr]    Compiling cookie v0.6.2
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling handlebars v0.27.0
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling error-chain v0.8.1
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling chrono v0.3.0
[INFO] [stderr]    Compiling postgres-shared v0.3.0
[INFO] [stderr]    Compiling handlebars v0.25.3
[INFO] [stderr]    Compiling tera v0.7.2
[INFO] [stderr]    Compiling postgres v0.14.2
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr] error[E0432]: unresolved import `std::net::lookup_host`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rocket-0.2.11/src/config/config.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::net::{IpAddr, lookup_host};
[INFO] [stderr]   |                        ^^^^^^^^^^^ no `lookup_host` in `net`
[INFO] [stderr] 
[INFO] [stderr] error[E0283]: type annotations needed
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rocket-0.2.11/src/http/header.rs:480:47
[INFO] [stderr]     |
[INFO] [stderr] 480 |                 Header::new(key.as_str(), val.borrow())
[INFO] [stderr]     |                                               ^^^^^^ cannot infer type for enum `std::borrow::Cow<'_, str>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: cannot satisfy `std::borrow::Cow<'_, str>: std::borrow::Borrow<_>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0283, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0283`.
[INFO] [stderr] error: could not compile `rocket`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c3e20b6b5e48762c958402401a937731a4590f34dbc7355044563fb37987cfeb"`
[INFO] running `"docker" "rm" "-f" "c3e20b6b5e48762c958402401a937731a4590f34dbc7355044563fb37987cfeb"`
[INFO] [stdout] c3e20b6b5e48762c958402401a937731a4590f34dbc7355044563fb37987cfeb