[INFO] fetching crate rusty_enet 0.4.0...
[INFO] checking rusty_enet-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rusty_enet 0.4.0 into /workspace/builds/worker-2-tc2/source
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain
[INFO] started tweaking crates.io crate rusty_enet 0.4.0
[INFO] finished tweaking crates.io crate rusty_enet 0.4.0
[INFO] tweaked toml for crates.io crate rusty_enet 0.4.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rusty_enet 0.4.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rusty_enet 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 97e7ae253bf754830e7bc66c7e8dffb6da60c9e4bd9be0a20c2926457eb3b447
[INFO] running `Command { std: "docker" "start" "-a" "97e7ae253bf754830e7bc66c7e8dffb6da60c9e4bd9be0a20c2926457eb3b447", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97e7ae253bf754830e7bc66c7e8dffb6da60c9e4bd9be0a20c2926457eb3b447", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97e7ae253bf754830e7bc66c7e8dffb6da60c9e4bd9be0a20c2926457eb3b447", kill_on_drop: false }`
[INFO] [stdout] 97e7ae253bf754830e7bc66c7e8dffb6da60c9e4bd9be0a20c2926457eb3b447
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b12d1484facd661f39de8a921b419f685ce24b33cd11d1321d370fa56cab069
[INFO] running `Command { std: "docker" "start" "-a" "3b12d1484facd661f39de8a921b419f685ce24b33cd11d1321d370fa56cab069", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling getrandom v0.3.2
[INFO] [stderr]     Checking rusty_enet v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `decode_code` is never read
[INFO] [stdout]    --> src/c/compress.rs:687:21
[INFO] [stdout]     |
[INFO] [stdout] 687 |                     decode_code <<= 8_i32;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `decode_code` is never read
[INFO] [stdout]    --> src/c/compress.rs:691:25
[INFO] [stdout]     |
[INFO] [stdout] 691 |                         decode_code |= *fresh20 as u32;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/host.rs:166:25
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub fn check_events(&mut self) -> Option<Event<S>> {
[INFO] [stdout]     |                         ^^^^^^^^^            ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub fn check_events(&mut self) -> Option<Event<'_, S>> {
[INFO] [stdout]     |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/host.rs:185:20
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn service(&mut self) -> Result<Option<Event<S>>, S::Error> {
[INFO] [stdout]     |                    ^^^^^^^^^                   ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn service(&mut self) -> Result<Option<Event<'_, S>>, S::Error> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand v0.9.1
[INFO] [stdout] warning: value assigned to `decode_code` is never read
[INFO] [stdout]    --> src/c/compress.rs:687:21
[INFO] [stdout]     |
[INFO] [stdout] 687 |                     decode_code <<= 8_i32;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `decode_code` is never read
[INFO] [stdout]    --> src/c/compress.rs:691:25
[INFO] [stdout]     |
[INFO] [stdout] 691 |                         decode_code |= *fresh20 as u32;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/host.rs:166:25
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub fn check_events(&mut self) -> Option<Event<S>> {
[INFO] [stdout]     |                         ^^^^^^^^^            ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub fn check_events(&mut self) -> Option<Event<'_, S>> {
[INFO] [stdout]     |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/host.rs:185:20
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn service(&mut self) -> Result<Option<Event<S>>, S::Error> {
[INFO] [stdout]     |                    ^^^^^^^^^                   ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 185 |     pub fn service(&mut self) -> Result<Option<Event<'_, S>>, S::Error> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/test/network.rs:58:93
[INFO] [stdout]    |
[INFO] [stdout] 58 |       fn send(&mut self, address: Self::Address, buffer: &[u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  _____________________________________________________________________________________________^
[INFO] [stdout] 59 | |         Socket::send(self, address, buffer);
[INFO] [stdout] 60 | |         Ok(buffer.len())
[INFO] [stdout] 61 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/test/network.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         Ok(buffer.len())
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:66:77
[INFO] [stdout]    |
[INFO] [stdout] 66 |       ) -> Result<Option<(Self::Address, enet::PacketReceived)>, Self::Error> {
[INFO] [stdout]    |  _____________________________________________________________________________^
[INFO] [stdout] 67 | |         if let Some((address, data)) = Socket::receive(self) {
[INFO] [stdout] 68 | |             let data_length = data.len();
[INFO] [stdout] 69 | |             if data_length <= enet::MTU_MAX {
[INFO] [stdout] ...  |
[INFO] [stdout] 79 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 | /         if let Some((address, data)) = Socket::receive(self) {
[INFO] [stdout] 68 | |             let data_length = data.len();
[INFO] [stdout] 69 | |             if data_length <= enet::MTU_MAX {
[INFO] [stdout] 70 | |                 copy(&mut Cursor::new(data), &mut Cursor::new(&mut buffer[..]))
[INFO] [stdout] ...  |
[INFO] [stdout] 77 | |             Ok(None)
[INFO] [stdout] 78 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:67:62
[INFO] [stdout]    |
[INFO] [stdout] 67 |           if let Some((address, data)) = Socket::receive(self) {
[INFO] [stdout]    |  ______________________________________________________________^
[INFO] [stdout] 68 | |             let data_length = data.len();
[INFO] [stdout] 69 | |             if data_length <= enet::MTU_MAX {
[INFO] [stdout] 70 | |                 copy(&mut Cursor::new(data), &mut Cursor::new(&mut buffer[..]))
[INFO] [stdout] ...  |
[INFO] [stdout] 76 | |         } else {
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 | /             if data_length <= enet::MTU_MAX {
[INFO] [stdout] 70 | |                 copy(&mut Cursor::new(data), &mut Cursor::new(&mut buffer[..]))
[INFO] [stdout] 71 | |                     .expect("Buffer copy should not fail.");
[INFO] [stdout] 72 | |                 Ok(Some((address, enet::PacketReceived::Complete(data_length))))
[INFO] [stdout] 73 | |             } else {
[INFO] [stdout] 74 | |                 Ok(None)
[INFO] [stdout] 75 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:69:45
[INFO] [stdout]    |
[INFO] [stdout] 69 |               if data_length <= enet::MTU_MAX {
[INFO] [stdout]    |  _____________________________________________^
[INFO] [stdout] 70 | |                 copy(&mut Cursor::new(data), &mut Cursor::new(&mut buffer[..]))
[INFO] [stdout] 71 | |                     .expect("Buffer copy should not fail.");
[INFO] [stdout] 72 | |                 Ok(Some((address, enet::PacketReceived::Complete(data_length))))
[INFO] [stdout] 73 | |             } else {
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 Ok(Some((address, enet::PacketReceived::Complete(data_length))))
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:73:20
[INFO] [stdout]    |
[INFO] [stdout] 73 |               } else {
[INFO] [stdout]    |  ____________________^
[INFO] [stdout] 74 | |                 Ok(None)
[INFO] [stdout] 75 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:74:17
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 Ok(None)
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:76:16
[INFO] [stdout]    |
[INFO] [stdout] 76 |           } else {
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 77 | |             Ok(None)
[INFO] [stdout] 78 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(usize, socket::PacketReceived)>, Infallible>
[INFO] [stdout]   --> src/test/network.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |             Ok(None)
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<event::Event<'_, network::Socket>>, Infallible>
[INFO] [stdout]    --> src/test/network.rs:208:42
[INFO] [stdout]     |
[INFO] [stdout] 208 |                     if let Some(event) = host.service().unwrap() {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rusty_enet` (lib test) due to 13 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "3b12d1484facd661f39de8a921b419f685ce24b33cd11d1321d370fa56cab069", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b12d1484facd661f39de8a921b419f685ce24b33cd11d1321d370fa56cab069", kill_on_drop: false }`
[INFO] [stdout] 3b12d1484facd661f39de8a921b419f685ce24b33cd11d1321d370fa56cab069
