[INFO] fetching crate coreplus 0.2.1...
[INFO] checking coreplus-0.2.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate coreplus 0.2.1 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate coreplus 0.2.1
[INFO] finished tweaking crates.io crate coreplus 0.2.1
[INFO] tweaked toml for crates.io crate coreplus 0.2.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate coreplus 0.2.1 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] 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 07fad50525002fa3c142c335e5972fbb1f2e9d564121b8308c58b5decdb7a621
[INFO] running `Command { std: "docker" "start" "-a" "07fad50525002fa3c142c335e5972fbb1f2e9d564121b8308c58b5decdb7a621", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07fad50525002fa3c142c335e5972fbb1f2e9d564121b8308c58b5decdb7a621", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07fad50525002fa3c142c335e5972fbb1f2e9d564121b8308c58b5decdb7a621", kill_on_drop: false }`
[INFO] [stdout] 07fad50525002fa3c142c335e5972fbb1f2e9d564121b8308c58b5decdb7a621
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f8a1099f312be506de510c3e0387fe6b9e1c21b288ff4b4d1e7a3540e7fbd94f
[INFO] running `Command { std: "docker" "start" "-a" "f8a1099f312be506de510c3e0387fe6b9e1c21b288ff4b4d1e7a3540e7fbd94f", kill_on_drop: false }`
[INFO] [stderr]     Checking coreplus v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/io.rs:116:70
[INFO] [stdout]     |
[INFO] [stdout] 116 |       fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]     |  ______________________________________________________________________^
[INFO] [stdout] 117 | |         let amt = cmp::min(buf.len(), self.len());
[INFO] [stdout] 118 | |         let (a, b) = self.split_at(amt);
[INFO] [stdout] ...   |
[INFO] [stdout] 130 | |         Ok(amt)
[INFO] [stdout] 131 | |     }
[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/io.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |         Ok(amt)
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/io.rs:137:68
[INFO] [stdout]     |
[INFO] [stdout] 137 |       fn write(&mut self, data: &[u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]     |  ____________________________________________________________________^
[INFO] [stdout] 138 | |         let amt = cmp::min(data.len(), self.len());
[INFO] [stdout] 139 | |         let (a, b) = mem::replace(self, &mut []).split_at_mut(amt);
[INFO] [stdout] 140 | |         a.copy_from_slice(&data[..amt]);
[INFO] [stdout] 141 | |         *self = b;
[INFO] [stdout] 142 | |         Ok(amt)
[INFO] [stdout] 143 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/io.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         Ok(amt)
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/io.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 150 |         self.write(data).map(|_| {})
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]   --> src/net/parser.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 |             Self::checked_mul(*self, other.try_into().ok()?)
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 | 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/net/parser.rs:24:38
[INFO] [stdout]    |
[INFO] [stdout] 24 |             Self::checked_add(*self, other.try_into().ok()?)
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 | 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 `coreplus` (lib test) due to 7 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/io.rs:116:70
[INFO] [stdout]     |
[INFO] [stdout] 116 |       fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]     |  ______________________________________________________________________^
[INFO] [stdout] 117 | |         let amt = cmp::min(buf.len(), self.len());
[INFO] [stdout] 118 | |         let (a, b) = self.split_at(amt);
[INFO] [stdout] ...   |
[INFO] [stdout] 130 | |         Ok(amt)
[INFO] [stdout] 131 | |     }
[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/io.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |         Ok(amt)
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/io.rs:137:68
[INFO] [stdout]     |
[INFO] [stdout] 137 |       fn write(&mut self, data: &[u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]     |  ____________________________________________________________________^
[INFO] [stdout] 138 | |         let amt = cmp::min(data.len(), self.len());
[INFO] [stdout] 139 | |         let (a, b) = mem::replace(self, &mut []).split_at_mut(amt);
[INFO] [stdout] 140 | |         a.copy_from_slice(&data[..amt]);
[INFO] [stdout] 141 | |         *self = b;
[INFO] [stdout] 142 | |         Ok(amt)
[INFO] [stdout] 143 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/io.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         Ok(amt)
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/io.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 150 |         self.write(data).map(|_| {})
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]   --> src/net/parser.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 |             Self::checked_mul(*self, other.try_into().ok()?)
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 | 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/net/parser.rs:24:38
[INFO] [stdout]    |
[INFO] [stdout] 24 |             Self::checked_add(*self, other.try_into().ok()?)
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 | 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 `coreplus` (lib) due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "f8a1099f312be506de510c3e0387fe6b9e1c21b288ff4b4d1e7a3540e7fbd94f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8a1099f312be506de510c3e0387fe6b9e1c21b288ff4b4d1e7a3540e7fbd94f", kill_on_drop: false }`
[INFO] [stdout] f8a1099f312be506de510c3e0387fe6b9e1c21b288ff4b4d1e7a3540e7fbd94f
