[INFO] cloning repository https://github.com/nkconnor/rust-ipv4-optimization [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nkconnor/rust-ipv4-optimization" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnkconnor%2Frust-ipv4-optimization", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnkconnor%2Frust-ipv4-optimization'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 49c3a47eaf493217be0b78a9bce643c3f62afa4a [INFO] checking nkconnor/rust-ipv4-optimization against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnkconnor%2Frust-ipv4-optimization" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/nkconnor/rust-ipv4-optimization [INFO] finished tweaking git repo https://github.com/nkconnor/rust-ipv4-optimization [INFO] tweaked toml for git repo https://github.com/nkconnor/rust-ipv4-optimization written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/nkconnor/rust-ipv4-optimization 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 git repo https://github.com/nkconnor/rust-ipv4-optimization 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 666a6394cdc8b791b666d868ea5180c3c566e5408eb058c30923d13c924efef8 [INFO] running `Command { std: "docker" "start" "-a" "666a6394cdc8b791b666d868ea5180c3c566e5408eb058c30923d13c924efef8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "666a6394cdc8b791b666d868ea5180c3c566e5408eb058c30923d13c924efef8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "666a6394cdc8b791b666d868ea5180c3c566e5408eb058c30923d13c924efef8", kill_on_drop: false }` [INFO] [stdout] 666a6394cdc8b791b666d868ea5180c3c566e5408eb058c30923d13c924efef8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 7dd5a718f4a5aabc2b3174b26be665f75f556c20199c85fa1bf111dd5d6a9af3 [INFO] running `Command { std: "docker" "start" "-a" "7dd5a718f4a5aabc2b3174b26be665f75f556c20199c85fa1bf111dd5d6a9af3", kill_on_drop: false }` [INFO] [stderr] Compiling serde v1.0.137 [INFO] [stderr] Compiling crossbeam-utils v0.8.8 [INFO] [stderr] Compiling crossbeam-epoch v0.9.8 [INFO] [stderr] Compiling rayon-core v1.9.3 [INFO] [stderr] Checking ryu v1.0.10 [INFO] [stderr] Compiling syn v1.0.95 [INFO] [stderr] Compiling serde_json v1.0.81 [INFO] [stderr] Compiling rayon v1.5.3 [INFO] [stderr] Checking unicode-width v0.1.9 [INFO] [stderr] Checking itoa v1.0.2 [INFO] [stderr] Checking plotters-backend v0.3.2 [INFO] [stderr] Checking num_cpus v1.13.1 [INFO] [stderr] Checking csv-core v0.1.10 [INFO] [stderr] Compiling cast v0.2.7 [INFO] [stderr] Checking num-traits v0.2.15 [INFO] [stderr] Checking itertools v0.10.3 [INFO] [stderr] Checking half v1.8.2 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking regex v1.5.5 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking oorandom v11.1.3 [INFO] [stderr] Checking rust-ipv4-optimization v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking plotters-svg v0.3.1 [INFO] [stdout] warning: multiple methods are never used [INFO] [stdout] --> src/lib.rs:159:8 [INFO] [stdout] | [INFO] [stdout] 33 | impl<'a> Parser<'a> { [INFO] [stdout] | ------------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 159 | fn read_ipv6_addr(&mut self) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 226 | fn read_ip_addr(&mut self) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 233 | fn read_port(&mut self) -> Option { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 241 | fn read_scope_id(&mut self) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 249 | fn read_socket_addr_v4(&mut self) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 258 | fn read_socket_addr_v6(&mut self) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 271 | fn read_socket_addr(&mut self) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/lib.rs:17:38 [INFO] [stdout] | [INFO] [stdout] 17 | Self::checked_mul(*self, other.try_into().ok()?) [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 26 | impl_helper! { u8 u16 u32 } [INFO] [stdout] | --------------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [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 [INFO] [stdout] --> src/lib.rs:21:38 [INFO] [stdout] | [INFO] [stdout] 21 | Self::checked_add(*self, other.try_into().ok()?) [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 26 | 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] Checking clap v2.34.0 [INFO] [stderr] error: could not compile `rust-ipv4-optimization` (lib) due to 2 previous errors; 1 warning emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "7dd5a718f4a5aabc2b3174b26be665f75f556c20199c85fa1bf111dd5d6a9af3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7dd5a718f4a5aabc2b3174b26be665f75f556c20199c85fa1bf111dd5d6a9af3", kill_on_drop: false }` [INFO] [stdout] 7dd5a718f4a5aabc2b3174b26be665f75f556c20199c85fa1bf111dd5d6a9af3