[INFO] fetching crate no-std-net 0.6.0...
[INFO] checking no-std-net-0.6.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate no-std-net 0.6.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate no-std-net 0.6.0
[INFO] finished tweaking crates.io crate no-std-net 0.6.0
[INFO] tweaked toml for crates.io crate no-std-net 0.6.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate no-std-net 0.6.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages to latest compatible versions
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 23c8b999d2b770c669fb22aa95139ad6b2d13496a7ec214bde7237ec58b8dfd4
[INFO] running `Command { std: "docker" "start" "-a" "23c8b999d2b770c669fb22aa95139ad6b2d13496a7ec214bde7237ec58b8dfd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23c8b999d2b770c669fb22aa95139ad6b2d13496a7ec214bde7237ec58b8dfd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23c8b999d2b770c669fb22aa95139ad6b2d13496a7ec214bde7237ec58b8dfd4", kill_on_drop: false }`
[INFO] [stdout] 23c8b999d2b770c669fb22aa95139ad6b2d13496a7ec214bde7237ec58b8dfd4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 2a923cf2b4abb9218f5f59b577520dca2e70a87c445f5987ee5c3e1b5da90544
[INFO] running `Command { std: "docker" "start" "-a" "2a923cf2b4abb9218f5f59b577520dca2e70a87c445f5987ee5c3e1b5da90544", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking no-std-net v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:749:90
[INFO] [stdout]     |
[INFO] [stdout] 749 |       fn to_socket_addrs(&self) -> Result<option::IntoIter<SocketAddr>, ToSocketAddrError> {
[INFO] [stdout]     |  __________________________________________________________________________________________^
[INFO] [stdout] 750 | |         Ok(Some(*self).into_iter())
[INFO] [stdout] 751 | |     }
[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<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:750:9
[INFO] [stdout]     |
[INFO] [stdout] 750 |         Ok(Some(*self).into_iter())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:756:90
[INFO] [stdout]     |
[INFO] [stdout] 756 |       fn to_socket_addrs(&self) -> Result<option::IntoIter<SocketAddr>, ToSocketAddrError> {
[INFO] [stdout]     |  __________________________________________________________________________________________^
[INFO] [stdout] 757 | |         SocketAddr::V4(*self).to_socket_addrs()
[INFO] [stdout] 758 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:757:9
[INFO] [stdout]     |
[INFO] [stdout] 757 |         SocketAddr::V4(*self).to_socket_addrs()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:763:90
[INFO] [stdout]     |
[INFO] [stdout] 763 |       fn to_socket_addrs(&self) -> Result<option::IntoIter<SocketAddr>, ToSocketAddrError> {
[INFO] [stdout]     |  __________________________________________________________________________________________^
[INFO] [stdout] 764 | |         SocketAddr::V6(*self).to_socket_addrs()
[INFO] [stdout] 765 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:764:9
[INFO] [stdout]     |
[INFO] [stdout] 764 |         SocketAddr::V6(*self).to_socket_addrs()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:770:90
[INFO] [stdout]     |
[INFO] [stdout] 770 |       fn to_socket_addrs(&self) -> Result<option::IntoIter<SocketAddr>, ToSocketAddrError> {
[INFO] [stdout]     |  __________________________________________________________________________________________^
[INFO] [stdout] 771 | |         let (ip, port) = *self;
[INFO] [stdout] 772 | |         match ip {
[INFO] [stdout] 773 | |             IpAddr::V4(ref a) => (*a, port).to_socket_addrs(),
[INFO] [stdout] ...   |
[INFO] [stdout] 776 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:772:9
[INFO] [stdout]     |
[INFO] [stdout] 772 | /         match ip {
[INFO] [stdout] 773 | |             IpAddr::V4(ref a) => (*a, port).to_socket_addrs(),
[INFO] [stdout] 774 | |             IpAddr::V6(ref a) => (*a, port).to_socket_addrs(),
[INFO] [stdout] 775 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:773:34
[INFO] [stdout]     |
[INFO] [stdout] 773 |             IpAddr::V4(ref a) => (*a, port).to_socket_addrs(),
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:774:34
[INFO] [stdout]     |
[INFO] [stdout] 774 |             IpAddr::V6(ref a) => (*a, port).to_socket_addrs(),
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:781:90
[INFO] [stdout]     |
[INFO] [stdout] 781 |       fn to_socket_addrs(&self) -> Result<option::IntoIter<SocketAddr>, ToSocketAddrError> {
[INFO] [stdout]     |  __________________________________________________________________________________________^
[INFO] [stdout] 782 | |         let (ip, port) = *self;
[INFO] [stdout] 783 | |         SocketAddrV4::new(ip, port).to_socket_addrs()
[INFO] [stdout] 784 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:783:9
[INFO] [stdout]     |
[INFO] [stdout] 783 |         SocketAddrV4::new(ip, port).to_socket_addrs()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:789:90
[INFO] [stdout]     |
[INFO] [stdout] 789 |       fn to_socket_addrs(&self) -> Result<option::IntoIter<SocketAddr>, ToSocketAddrError> {
[INFO] [stdout]     |  __________________________________________________________________________________________^
[INFO] [stdout] 790 | |         let (ip, port) = *self;
[INFO] [stdout] 791 | |         SocketAddrV6::new(ip, port, 0, 0).to_socket_addrs()
[INFO] [stdout] 792 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<core::option::IntoIter<addr::SocketAddr>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:791:9
[INFO] [stdout]     |
[INFO] [stdout] 791 |         SocketAddrV6::new(ip, port, 0, 0).to_socket_addrs()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type continue be must used: Result<Cloned<core::slice::Iter<'_, addr::SocketAddr>>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:798:72
[INFO] [stdout]     |
[INFO] [stdout] 798 |       fn to_socket_addrs(&self) -> Result<Self::Iter, ToSocketAddrError> {
[INFO] [stdout]     |  ________________________________________________________________________^
[INFO] [stdout] 799 | |         Ok(self.iter().cloned())
[INFO] [stdout] 800 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:49:5
[INFO] [stdout]     |
[INFO] [stdout]  49 |     warnings
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(mustuse_in_always_ok)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type continue be must used: Result<Cloned<core::slice::Iter<'_, addr::SocketAddr>>, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:799:9
[INFO] [stdout]     |
[INFO] [stdout] 799 |         Ok(self.iter().cloned())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type continue be must used: Result<<T as ToSocketAddrs>::Iter, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:805:69
[INFO] [stdout]     |
[INFO] [stdout] 805 |       fn to_socket_addrs(&self) -> Result<T::Iter, ToSocketAddrError> {
[INFO] [stdout]     |  _____________________________________________________________________^
[INFO] [stdout] 806 | |         (**self).to_socket_addrs()
[INFO] [stdout] 807 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type continue be must used: Result<<T as ToSocketAddrs>::Iter, ToSocketAddrError>
[INFO] [stdout]    --> src/addr.rs:806:9
[INFO] [stdout]     |
[INFO] [stdout] 806 |         (**self).to_socket_addrs()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]   --> src/parser.rs:30:38
[INFO] [stdout]    |
[INFO] [stdout] 30 |             Self::checked_mul(*self, other.try_into().ok()?)
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 | impl_helper! { u8 u16 u32 }
[INFO] [stdout]    | --------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `impl_helper` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]   --> src/parser.rs:34:38
[INFO] [stdout]    |
[INFO] [stdout] 34 |             Self::checked_add(*self, other.try_into().ok()?)
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 | impl_helper! { u8 u16 u32 }
[INFO] [stdout]    | --------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `impl_helper` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `no-std-net` (lib) due to 20 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2a923cf2b4abb9218f5f59b577520dca2e70a87c445f5987ee5c3e1b5da90544", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a923cf2b4abb9218f5f59b577520dca2e70a87c445f5987ee5c3e1b5da90544", kill_on_drop: false }`
[INFO] [stdout] 2a923cf2b4abb9218f5f59b577520dca2e70a87c445f5987ee5c3e1b5da90544
