[INFO] fetching crate appliance 0.2.4...
[INFO] testing appliance-0.2.4 against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] extracting crate appliance 0.2.4 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate appliance 0.2.4 on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate appliance 0.2.4
[INFO] finished tweaking crates.io crate appliance 0.2.4
[INFO] tweaked toml for crates.io crate appliance 0.2.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 118 packages to latest compatible versions
[INFO] [stderr]       Adding async-io v1.13.0 (latest: v2.3.2)
[INFO] [stderr]       Adding async-lock v2.8.0 (latest: v3.3.0)
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[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
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[INFO] [stderr]       Adding event-listener v2.5.3 (latest: v5.3.0)
[INFO] [stderr]       Adding fastrand v1.9.0 (latest: v2.1.0)
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[INFO] [stderr]       Adding futures-lite v1.13.0 (latest: v2.3.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.1)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding io-lifetimes v1.0.11 (latest: v2.0.3)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.13.0)
[INFO] [stderr]       Adding linux-raw-sys v0.3.8 (latest: v0.6.4)
[INFO] [stderr]       Adding polling v2.8.0 (latest: v3.7.0)
[INFO] [stderr]       Adding rustix v0.37.27 (latest: v0.38.34)
[INFO] [stderr]       Adding socket2 v0.4.10 (latest: v0.5.7)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.1+wasi-0.2.0)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
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[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.5)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_cbor v0.11.2
[INFO] [stderr]   Downloaded half v1.8.3
[INFO] [stderr]   Downloaded criterion-plot v0.4.5
[INFO] [stderr]   Downloaded criterion v0.3.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 368559cba24b2ebf08166f8ef09805ecf7b13f062cea24f099d3c7f54708fe7c
[INFO] running `Command { std: "docker" "start" "-a" "368559cba24b2ebf08166f8ef09805ecf7b13f062cea24f099d3c7f54708fe7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "368559cba24b2ebf08166f8ef09805ecf7b13f062cea24f099d3c7f54708fe7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "368559cba24b2ebf08166f8ef09805ecf7b13f062cea24f099d3c7f54708fe7c", kill_on_drop: false }`
[INFO] [stdout] 368559cba24b2ebf08166f8ef09805ecf7b13f062cea24f099d3c7f54708fe7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd30e5ffa36e2648620c23d5342fb33ba4bbb8da3f388b565e28f61af9501d27
[INFO] running `Command { std: "docker" "start" "-a" "cd30e5ffa36e2648620c23d5342fb33ba4bbb8da3f388b565e28f61af9501d27", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling futures-core v0.3.30
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[INFO] [stderr]    Compiling appliance v0.2.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.07s
[INFO] running `Command { std: "docker" "inspect" "cd30e5ffa36e2648620c23d5342fb33ba4bbb8da3f388b565e28f61af9501d27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd30e5ffa36e2648620c23d5342fb33ba4bbb8da3f388b565e28f61af9501d27", kill_on_drop: false }`
[INFO] [stdout] cd30e5ffa36e2648620c23d5342fb33ba4bbb8da3f388b565e28f61af9501d27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b48af9a9ab87ae4d53dd3edf3809abf2cee84eec61793a33b2c67dc4908d040
[INFO] running `Command { std: "docker" "start" "-a" "5b48af9a9ab87ae4d53dd3edf3809abf2cee84eec61793a33b2c67dc4908d040", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling either v1.12.0
[INFO] [stderr]    Compiling regex-syntax v0.8.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling unicode-width v0.1.12
[INFO] [stderr]    Compiling plotters-backend v0.3.6
[INFO] [stderr]    Compiling csv-core v0.1.11
[INFO] [stderr]    Compiling half v1.8.3
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling cast v0.3.0
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.202
[INFO] [stderr]    Compiling thiserror-impl v1.0.61
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling oorandom v11.1.3
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[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling csv v1.3.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling plotters-svg v0.3.6
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling crossbeam-deque v0.8.5
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[INFO] [stderr]    Compiling appliance v0.2.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 14.81s
[INFO] running `Command { std: "docker" "inspect" "5b48af9a9ab87ae4d53dd3edf3809abf2cee84eec61793a33b2c67dc4908d040", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b48af9a9ab87ae4d53dd3edf3809abf2cee84eec61793a33b2c67dc4908d040", kill_on_drop: false }`
[INFO] [stdout] 5b48af9a9ab87ae4d53dd3edf3809abf2cee84eec61793a33b2c67dc4908d040
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e882a5aaac772a22eec884f8c8e96b1001b27395045e60a2e9a8f80cee163060
[INFO] running `Command { std: "docker" "start" "-a" "e882a5aaac772a22eec884f8c8e96b1001b27395045e60a2e9a8f80cee163060", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/appliance-4dda0db85018f779)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests appliance
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - Message (line 47) ... FAILED
[INFO] [stdout] test src/lib.rs - Handler (line 83) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Message (line 47) stdout ----
[INFO] [stdout] error[E0053]: method `handle` has an incompatible type for trait
[INFO] [stdout]   --> src/lib.rs:58:32
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn handle(&mut self, _msg: &Ping) -> usize {
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout]    |                                |
[INFO] [stdout]    |                                expected `Ping`, found `&Ping`
[INFO] [stdout]    |                                help: change the parameter type to match the trait: `Ping`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected signature `fn(&mut Appliance<'_, _>, Ping) -> _`
[INFO] [stdout]               found signature `fn(&mut Appliance<'_, _>, &Ping) -> _`
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `send_and_wait_with_timeout` found for struct `Descriptor` in the current scope
[INFO] [stdout]   --> src/lib.rs:65:22
[INFO] [stdout]    |
[INFO] [stdout] 21 |     match descriptor.send_and_wait_with_timeout(Ping, Duration::from_secs(10)) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a method `send_and_wait_sync` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 21 |     match descriptor.send_and_wait_sync(Ping, Duration::from_secs(10)) {
[INFO] [stdout]    |                      ~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0053, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0053`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Handler (line 83) stdout ----
[INFO] [stdout] error[E0053]: method `handle` has an incompatible type for trait
[INFO] [stdout]   --> src/lib.rs:94:32
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn handle(&mut self, _msg: &Ping) -> usize {
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout]    |                                |
[INFO] [stdout]    |                                expected `Ping`, found `&Ping`
[INFO] [stdout]    |                                help: change the parameter type to match the trait: `Ping`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected signature `fn(&mut Appliance<'_, _>, Ping) -> _`
[INFO] [stdout]               found signature `fn(&mut Appliance<'_, _>, &Ping) -> _`
[INFO] [stdout] 
[INFO] [stdout] error[E0053]: method `handle` has an incompatible type for trait
[INFO] [stdout]   --> src/lib.rs:105:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn handle(&mut self, _msg: &Reset) {
[INFO] [stdout]    |                                ^^^^^^
[INFO] [stdout]    |                                |
[INFO] [stdout]    |                                expected `Reset`, found `&Reset`
[INFO] [stdout]    |                                help: change the parameter type to match the trait: `Reset`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected signature `fn(&mut Appliance<'_, _>, Reset)`
[INFO] [stdout]               found signature `fn(&mut Appliance<'_, _>, &Reset)`
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: missing generics for enum `appliance::Error`
[INFO] [stdout]   --> src/lib.rs:112:36
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn main() -> Result<(), appliance::Error> {
[INFO] [stdout]    |                                    ^^^^^ expected 1 generic argument
[INFO] [stdout]    |
[INFO] [stdout] note: enum defined here, with 1 generic parameter: `M`
[INFO] [stdout]   --> /opt/rustwide/workdir/src/error.rs:6:10
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub enum Error<M> {
[INFO] [stdout]    |          ^^^^^ -
[INFO] [stdout] help: add missing generic argument
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn main() -> Result<(), appliance::Error<M>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this method takes 2 arguments but 1 argument was supplied
[INFO] [stdout]    --> src/lib.rs:114:28
[INFO] [stdout]     |
[INFO] [stdout] 33  |     assert_eq!(*descriptor.send_and_wait_sync(Ping)?, 1);
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^------ an argument of type `Option<Duration>` is missing
[INFO] [stdout]     |
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /opt/rustwide/workdir/src/lib.rs:351:12
[INFO] [stdout]     |
[INFO] [stdout] 351 |     pub fn send_and_wait_sync<M>(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: provide the argument
[INFO] [stdout]     |
[INFO] [stdout] 33  |     assert_eq!(*descriptor.send_and_wait_sync(Ping, /* Option<Duration> */)?, 1);
[INFO] [stdout]     |                                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error[E0614]: type `usize` cannot be dereferenced
[INFO] [stdout]   --> src/lib.rs:114:16
[INFO] [stdout]    |
[INFO] [stdout] 33 |     assert_eq!(*descriptor.send_and_wait_sync(Ping)?, 1);
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this method takes 2 arguments but 1 argument was supplied
[INFO] [stdout]    --> src/lib.rs:115:28
[INFO] [stdout]     |
[INFO] [stdout] 34  |     assert_eq!(*descriptor.send_and_wait_sync(Ping)?, 2);
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^------ an argument of type `Option<Duration>` is missing
[INFO] [stdout]     |
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /opt/rustwide/workdir/src/lib.rs:351:12
[INFO] [stdout]     |
[INFO] [stdout] 351 |     pub fn send_and_wait_sync<M>(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: provide the argument
[INFO] [stdout]     |
[INFO] [stdout] 34  |     assert_eq!(*descriptor.send_and_wait_sync(Ping, /* Option<Duration> */)?, 2);
[INFO] [stdout]     |                                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error[E0614]: type `usize` cannot be dereferenced
[INFO] [stdout]   --> src/lib.rs:115:16
[INFO] [stdout]    |
[INFO] [stdout] 34 |     assert_eq!(*descriptor.send_and_wait_sync(Ping)?, 2);
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `send` found for struct `Descriptor` in the current scope
[INFO] [stdout]   --> src/lib.rs:116:16
[INFO] [stdout]    |
[INFO] [stdout] 35 |     descriptor.send(Reset)?;
[INFO] [stdout]    |                ^^^^ method not found in `Descriptor<'_, Appliance<'_, usize>>`
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this method takes 2 arguments but 1 argument was supplied
[INFO] [stdout]    --> src/lib.rs:117:28
[INFO] [stdout]     |
[INFO] [stdout] 36  |     assert_eq!(*descriptor.send_and_wait_sync(Ping)?, 1);
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^------ an argument of type `Option<Duration>` is missing
[INFO] [stdout]     |
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /opt/rustwide/workdir/src/lib.rs:351:12
[INFO] [stdout]     |
[INFO] [stdout] 351 |     pub fn send_and_wait_sync<M>(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: provide the argument
[INFO] [stdout]     |
[INFO] [stdout] 36  |     assert_eq!(*descriptor.send_and_wait_sync(Ping, /* Option<Duration> */)?, 1);
[INFO] [stdout]     |                                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error[E0614]: type `usize` cannot be dereferenced
[INFO] [stdout]   --> src/lib.rs:117:16
[INFO] [stdout]    |
[INFO] [stdout] 36 |     assert_eq!(*descriptor.send_and_wait_sync(Ping)?, 1);
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 10 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0053, E0061, E0107, E0599, E0614.
[INFO] [stdout] For more information about an error, try `rustc --explain E0053`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Handler (line 83)
[INFO] [stdout]     src/lib.rs - Message (line 47)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.16s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "e882a5aaac772a22eec884f8c8e96b1001b27395045e60a2e9a8f80cee163060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e882a5aaac772a22eec884f8c8e96b1001b27395045e60a2e9a8f80cee163060", kill_on_drop: false }`
[INFO] [stdout] e882a5aaac772a22eec884f8c8e96b1001b27395045e60a2e9a8f80cee163060
