[INFO] fetching crate taikai 0.1.0...
[INFO] checking taikai-0.1.0 against master#201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba for pr-63809
[INFO] extracting crate taikai 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate taikai 0.1.0 on toolchain 201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba
[INFO] running `"/workspace/cargo-home/bin/cargo" "+201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate taikai 0.1.0
[INFO] finished tweaking crates.io crate taikai 0.1.0
[INFO] tweaked toml for crates.io crate taikai 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba" "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] ba69cf95a3da041c9f8ef85abcb61355e7067606fbe0cb55573913798784d0db
[INFO] running `"docker" "start" "-a" "ba69cf95a3da041c9f8ef85abcb61355e7067606fbe0cb55573913798784d0db"`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling linked-hash-map v0.5.2
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]     Checking tuple_utils v0.3.0
[INFO] [stderr]     Checking proc-macro2 v0.4.30
[INFO] [stderr]     Checking memchr v2.2.1
[INFO] [stderr]    Compiling encoding_rs v0.8.20
[INFO] [stderr]     Checking serde_yaml v0.8.11
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling yaml-rust v0.4.3
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]     Checking taikai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]    --> src/type_spec.rs:134:36
[INFO] [stderr]     |
[INFO] [stderr] 134 |     pub fn resolve_enum(&self, mut path: Vec<&str>) -> Enum {
[INFO] [stderr]     |                                    ^^^^ help: consider prefixing with an underscore: `_path`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/attribute.rs:212:43
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let read_scalar = if let Some(ref e) = self.enum_ {
[INFO] [stderr]     |                                           ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/type_spec.rs:134:32
[INFO] [stderr]     |
[INFO] [stderr] 134 |     pub fn resolve_enum(&self, mut path: Vec<&str>) -> Enum {
[INFO] [stderr]     |                                ----^^^^
[INFO] [stderr]     |                                |
[INFO] [stderr]     |                                help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]    --> src/type_spec.rs:134:36
[INFO] [stderr]     |
[INFO] [stderr] 134 |     pub fn resolve_enum(&self, mut path: Vec<&str>) -> Enum {
[INFO] [stderr]     |                                    ^^^^ help: consider prefixing with an underscore: `_path`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/attribute.rs:212:43
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let read_scalar = if let Some(ref e) = self.enum_ {
[INFO] [stderr]     |                                           ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/type_spec.rs:134:32
[INFO] [stderr]     |
[INFO] [stderr] 134 |     pub fn resolve_enum(&self, mut path: Vec<&str>) -> Enum {
[INFO] [stderr]     |                                ----^^^^
[INFO] [stderr]     |                                |
[INFO] [stderr]     |                                help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]    --> src/type_spec.rs:134:36
[INFO] [stderr]     |
[INFO] [stderr] 134 |     pub fn resolve_enum(&self, mut path: Vec<&str>) -> Enum {
[INFO] [stderr]     |                                    ^^^^ help: consider prefixing with an underscore: `_path`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/attribute.rs:212:43
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let read_scalar = if let Some(ref e) = self.enum_ {
[INFO] [stderr]     |                                           ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/type_spec.rs:134:32
[INFO] [stderr]     |
[INFO] [stderr] 134 |     pub fn resolve_enum(&self, mut path: Vec<&str>) -> Enum {
[INFO] [stderr]     |                                ----^^^^
[INFO] [stderr]     |                                |
[INFO] [stderr]     |                                help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.32s
[INFO] running `"docker" "inspect" "ba69cf95a3da041c9f8ef85abcb61355e7067606fbe0cb55573913798784d0db"`
[INFO] running `"docker" "rm" "-f" "ba69cf95a3da041c9f8ef85abcb61355e7067606fbe0cb55573913798784d0db"`
[INFO] [stdout] ba69cf95a3da041c9f8ef85abcb61355e7067606fbe0cb55573913798784d0db