[INFO] updating cached repository vorner/mix
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vorner/mix
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vorner/mix" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/vorner/mix"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/vorner/mix'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vorner/mix" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/vorner/mix"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/vorner/mix'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f28bcd808dd0799a495a5b9cce7b3634721bea79
[INFO] sha for GitHub repo vorner/mix: f28bcd808dd0799a495a5b9cce7b3634721bea79
[INFO] validating manifest of vorner/mix on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of vorner/mix on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing vorner/mix
[INFO] finished frobbing vorner/mix
[INFO] frobbed toml for vorner/mix written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/vorner/mix/Cargo.toml
[INFO] started frobbing vorner/mix
[INFO] finished frobbing vorner/mix
[INFO] frobbed toml for vorner/mix written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/vorner/mix/Cargo.toml
[INFO] crate vorner/mix already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking vorner/mix against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-0/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/vorner/mix:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8db13b6590c573763eed83bbd20c55dc026483950c97f4149d298d0c750c3ab0
[INFO] running `"docker" "start" "-a" "8db13b6590c573763eed83bbd20c55dc026483950c97f4149d298d0c750c3ab0"`
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]     Checking byteorder v1.2.6
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[INFO] [stderr]     Checking crossbeam-utils v0.5.0
[INFO] [stderr]     Checking lazycell v1.2.0
[INFO] [stderr]     Checking futures v0.1.24
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking rustc-demangle v0.1.9
[INFO] [stderr]     Checking ucd-util v0.1.1
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[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking unicode-width v0.1.5
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[INFO] [stderr]     Checking linked-hash-map v0.5.1
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[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking utf8-ranges v1.0.1
[INFO] [stderr]     Checking rust-ini v0.12.2
[INFO] [stderr]     Checking termcolor v1.0.4
[INFO] [stderr]     Checking same-file v1.0.3
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking log v0.4.5
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling context v2.1.0
[INFO] [stderr]    Compiling rlua v0.15.2
[INFO] [stderr]     Checking tokio-executor v0.1.5
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking humantime v1.1.1
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking num_cpus v1.8.0
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[INFO] [stderr]     Checking yaml-rust v0.4.2
[INFO] [stderr]     Checking walkdir v2.2.5
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking smallvec v0.6.5
[INFO] [stderr]     Checking lock_api v0.1.4
[INFO] [stderr]     Checking num-traits v0.2.6
[INFO] [stderr]     Checking tokio-current-thread v0.1.3
[INFO] [stderr]     Checking tokio-timer v0.2.7
[INFO] [stderr]     Checking ryu v0.2.6
[INFO] [stderr]     Checking serde v1.0.79
[INFO] [stderr]     Checking bytes v0.4.10
[INFO] [stderr]     Checking lazy_static v1.1.0
[INFO] [stderr]     Checking kernel32-sys v0.2.2
[INFO] [stderr]     Checking tokio-io v0.1.9
[INFO] [stderr]     Checking memchr v2.1.0
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking backtrace-sys v0.1.24
[INFO] [stderr]     Checking serde_test v0.8.23
[INFO] [stderr]     Checking serde_json v1.0.31
[INFO] [stderr]     Checking toml v0.4.7
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking crossbeam-epoch v0.5.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]    Compiling syn v0.15.6
[INFO] [stderr]     Checking nom v4.0.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking aho-corasick v0.6.8
[INFO] [stderr]     Checking tokio-codec v0.1.1
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[INFO] [stderr]     Checking flate2 v1.0.2
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking crossbeam-deque v0.6.1
[INFO] [stderr]     Checking regex v1.0.5
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking structopt v0.2.10
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking tokio-reactor v0.1.6
[INFO] [stderr]     Checking once_cell v0.1.6
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking tokio-threadpool v0.1.7
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio-uds v0.2.2
[INFO] [stderr]     Checking tokio-udp v0.1.2
[INFO] [stderr]     Checking serde-hjson v0.8.1
[INFO] [stderr]     Checking tokio-fs v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]     Checking tokio v0.1.11
[INFO] [stderr]     Checking config v0.9.1
[INFO] [stderr]     Checking corona v0.4.0
[INFO] [stderr]     Checking mix v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/mailbox/task.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn new(inner: Arc<T>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_inner`
[INFO] [stderr]   --> src/mailbox/task.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn into_inner(self) -> Arc<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `perform`
[INFO] [stderr]   --> src/mailbox/task.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     fn perform(self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/mailbox/task.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     fn pop(&mut self) -> Option<Task> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `turn`
[INFO] [stderr]    --> src/mailbox/task.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub(super) fn turn(&mut self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `MailboxContent`
[INFO] [stderr]    --> src/mailbox.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 |     MailboxContent(Arc<Mailbox>),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/mailbox/task.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn new(inner: Arc<T>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_inner`
[INFO] [stderr]   --> src/mailbox/task.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn into_inner(self) -> Arc<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `perform`
[INFO] [stderr]   --> src/mailbox/task.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     fn perform(self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/mailbox/task.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     fn pop(&mut self) -> Option<Task> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `turn`
[INFO] [stderr]    --> src/mailbox/task.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub(super) fn turn(&mut self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `MailboxContent`
[INFO] [stderr]    --> src/mailbox.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 |     MailboxContent(Arc<Mailbox>),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 47s
[INFO] running `"docker" "inspect" "8db13b6590c573763eed83bbd20c55dc026483950c97f4149d298d0c750c3ab0"`
[INFO] running `"docker" "rm" "-f" "8db13b6590c573763eed83bbd20c55dc026483950c97f4149d298d0c750c3ab0"`
[INFO] [stdout] 8db13b6590c573763eed83bbd20c55dc026483950c97f4149d298d0c750c3ab0