[INFO] fetching crate dhcp4r 0.2.3...
[INFO] checking dhcp4r-0.2.3 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate dhcp4r 0.2.3 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate dhcp4r 0.2.3
[INFO] finished tweaking crates.io crate dhcp4r 0.2.3
[INFO] tweaked toml for crates.io crate dhcp4r 0.2.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dhcp4r 0.2.3 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate dhcp4r 0.2.3 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05a186f6fe45509bd047e76d0351c01df131f99ba6ace432f31a28f778b27e79
[INFO] running `Command { std: "docker" "start" "-a" "05a186f6fe45509bd047e76d0351c01df131f99ba6ace432f31a28f778b27e79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05a186f6fe45509bd047e76d0351c01df131f99ba6ace432f31a28f778b27e79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05a186f6fe45509bd047e76d0351c01df131f99ba6ace432f31a28f778b27e79", kill_on_drop: false }`
[INFO] [stdout] 05a186f6fe45509bd047e76d0351c01df131f99ba6ace432f31a28f778b27e79
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3465fd38e30dbd8e4ac546f217b4b15e6743b33056b3a9f6297dbd9ea2155d66
[INFO] running `Command { std: "docker" "start" "-a" "3465fd38e30dbd8e4ac546f217b4b15e6743b33056b3a9f6297dbd9ea2155d66", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]     Checking minimal-lexical v0.1.3
[INFO] [stderr]    Compiling standback v0.2.11
[INFO] [stderr]    Compiling nom v7.0.0
[INFO] [stderr]    Compiling time v0.2.22
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling enum-primitive-derive v0.2.1
[INFO] [stderr]     Checking dhcp4r v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/server.rs:131:54
[INFO] [stdout]     |
[INFO] [stdout] 131 |             Some(DhcpOption::ServerIdentifier(x)) => (x == &self.server_ip),
[INFO] [stdout]     |                                                      ^                    ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 131 -             Some(DhcpOption::ServerIdentifier(x)) => (x == &self.server_ip),
[INFO] [stdout] 131 +             Some(DhcpOption::ServerIdentifier(x)) => x == &self.server_ip,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/packet.rs:169:24
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn encode<'c>(&'c self, p: &'c mut [u8]) -> &[u8] {
[INFO] [stdout]     |                        ^^           ^^              ----- the lifetime gets resolved as `'c`
[INFO] [stdout]     |                        |            |
[INFO] [stdout]     |                        |            these lifetimes flow to the output
[INFO] [stdout]     |                        these lifetimes flow to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'c`
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn encode<'c>(&'c self, p: &'c mut [u8]) -> &'c [u8] {
[INFO] [stdout]     |                                                      ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/server.rs:131:54
[INFO] [stdout]     |
[INFO] [stdout] 131 |             Some(DhcpOption::ServerIdentifier(x)) => (x == &self.server_ip),
[INFO] [stdout]     |                                                      ^                    ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 131 -             Some(DhcpOption::ServerIdentifier(x)) => (x == &self.server_ip),
[INFO] [stdout] 131 +             Some(DhcpOption::ServerIdentifier(x)) => x == &self.server_ip,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> examples/server.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use(u32_bytes, bytes_u32)]
[INFO] [stdout]   |             ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/packet.rs:169:24
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn encode<'c>(&'c self, p: &'c mut [u8]) -> &[u8] {
[INFO] [stdout]     |                        ^^           ^^              ----- the lifetime gets resolved as `'c`
[INFO] [stdout]     |                        |            |
[INFO] [stdout]     |                        |            these lifetimes flow to the output
[INFO] [stdout]     |                        these lifetimes flow to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'c`
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn encode<'c>(&'c self, p: &'c mut [u8]) -> &'c [u8] {
[INFO] [stdout]     |                                                      ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.23s
[INFO] running `Command { std: "docker" "inspect" "3465fd38e30dbd8e4ac546f217b4b15e6743b33056b3a9f6297dbd9ea2155d66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3465fd38e30dbd8e4ac546f217b4b15e6743b33056b3a9f6297dbd9ea2155d66", kill_on_drop: false }`
[INFO] [stdout] 3465fd38e30dbd8e4ac546f217b4b15e6743b33056b3a9f6297dbd9ea2155d66