[INFO] fetching crate demes-forward 0.5.0...
[INFO] checking demes-forward-0.5.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate demes-forward 0.5.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate demes-forward 0.5.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate demes-forward 0.5.0
[INFO] tweaked toml for crates.io crate demes-forward 0.5.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate demes-forward 0.5.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate demes-forward 0.5.0 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.74
[INFO] [stderr]   Downloaded syn v2.0.46
[INFO] [stderr]   Downloaded demes v0.6.0
[INFO] [stderr]   Downloaded regex v1.9.6
[INFO] [stderr]   Downloaded regex-automata v0.3.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b282abf819c29f6728af35829f746ba6bbc45314a7f96dcddeef8b2fa3026010
[INFO] running `Command { std: "docker" "start" "-a" "b282abf819c29f6728af35829f746ba6bbc45314a7f96dcddeef8b2fa3026010", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b282abf819c29f6728af35829f746ba6bbc45314a7f96dcddeef8b2fa3026010", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b282abf819c29f6728af35829f746ba6bbc45314a7f96dcddeef8b2fa3026010", kill_on_drop: false }`
[INFO] [stdout] b282abf819c29f6728af35829f746ba6bbc45314a7f96dcddeef8b2fa3026010
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91bc303426ca2f401b0898c745449c887b1a821f566e9c73425c2c0d085251f2
[INFO] running `Command { std: "docker" "start" "-a" "91bc303426ca2f401b0898c745449c887b1a821f566e9c73425c2c0d085251f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.74
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]    Compiling demes v0.6.0
[INFO] [stderr]     Checking unsafe-libyaml v0.2.10
[INFO] [stderr]    Compiling anyhow v1.0.80
[INFO] [stderr]     Checking indexmap v1.9.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.46
[INFO] [stderr]     Checking regex-automata v0.3.9
[INFO] [stderr]     Checking regex v1.9.6
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]     Checking serde_yaml v0.9.21
[INFO] [stderr]     Checking demes-forward v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/graph.rs:589:36
[INFO] [stdout]     |
[INFO] [stdout] 589 |     fn get_slice_if<'a, T: Sized>(&'a self, generation: Generation, s: &'a [T]) -> Option<&[T]> {
[INFO] [stdout]     |                                    ^^                                   ^^                ---- the lifetime gets resolved as `'a`
[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 `'a`
[INFO] [stdout]     |
[INFO] [stdout] 589 |     fn get_slice_if<'a, T: Sized>(&'a self, generation: Generation, s: &'a [T]) -> Option<&'a [T]> {
[INFO] [stdout]     |                                                                                            ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/graph.rs:589:36
[INFO] [stdout]     |
[INFO] [stdout] 589 |     fn get_slice_if<'a, T: Sized>(&'a self, generation: Generation, s: &'a [T]) -> Option<&[T]> {
[INFO] [stdout]     |                                    ^^                                   ^^                ---- the lifetime gets resolved as `'a`
[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 `'a`
[INFO] [stdout]     |
[INFO] [stdout] 589 |     fn get_slice_if<'a, T: Sized>(&'a self, generation: Generation, s: &'a [T]) -> Option<&'a [T]> {
[INFO] [stdout]     |                                                                                            ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.48s
[INFO] running `Command { std: "docker" "inspect" "91bc303426ca2f401b0898c745449c887b1a821f566e9c73425c2c0d085251f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91bc303426ca2f401b0898c745449c887b1a821f566e9c73425c2c0d085251f2", kill_on_drop: false }`
[INFO] [stdout] 91bc303426ca2f401b0898c745449c887b1a821f566e9c73425c2c0d085251f2