[INFO] fetching crate arena-alloc 0.1.2...
[INFO] checking arena-alloc-0.1.2 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate arena-alloc 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate arena-alloc 0.1.2
[INFO] finished tweaking crates.io crate arena-alloc 0.1.2
[INFO] tweaked toml for crates.io crate arena-alloc 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate arena-alloc 0.1.2 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 5825898a1bbf55c2f6636d7410b7d7ed9a90363c71058b63c82f3d5d29f756fd
[INFO] running `Command { std: "docker" "start" "-a" "5825898a1bbf55c2f6636d7410b7d7ed9a90363c71058b63c82f3d5d29f756fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5825898a1bbf55c2f6636d7410b7d7ed9a90363c71058b63c82f3d5d29f756fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5825898a1bbf55c2f6636d7410b7d7ed9a90363c71058b63c82f3d5d29f756fd", kill_on_drop: false }`
[INFO] [stdout] 5825898a1bbf55c2f6636d7410b7d7ed9a90363c71058b63c82f3d5d29f756fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] c00742a970dfec9e82ce2c7b3ecfaaaee46df2a634e2f0d8e614dbd6102dcf58
[INFO] running `Command { std: "docker" "start" "-a" "c00742a970dfec9e82ce2c7b3ecfaaaee46df2a634e2f0d8e614dbd6102dcf58", kill_on_drop: false }`
[INFO] [stderr]     Checking arena-alloc v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:114:26
[INFO] [stdout]     |
[INFO] [stdout] 114 |     fn get_ptr_place<T>(&'a self) -> Option<(usize, &mut MaybeUninit<T>)> {
[INFO] [stdout]     |                          ^^                         ------------------- the lifetime gets resolved as `'a`
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          this lifetime flows 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] 114 |     fn get_ptr_place<T>(&'a self) -> Option<(usize, &'a mut MaybeUninit<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/lib.rs:114:26
[INFO] [stdout]     |
[INFO] [stdout] 114 |     fn get_ptr_place<T>(&'a self) -> Option<(usize, &mut MaybeUninit<T>)> {
[INFO] [stdout]     |                          ^^                         ------------------- the lifetime gets resolved as `'a`
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          this lifetime flows 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] 114 |     fn get_ptr_place<T>(&'a self) -> Option<(usize, &'a mut MaybeUninit<T>)> {
[INFO] [stdout]     |                                                      ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "c00742a970dfec9e82ce2c7b3ecfaaaee46df2a634e2f0d8e614dbd6102dcf58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c00742a970dfec9e82ce2c7b3ecfaaaee46df2a634e2f0d8e614dbd6102dcf58", kill_on_drop: false }`
[INFO] [stdout] c00742a970dfec9e82ce2c7b3ecfaaaee46df2a634e2f0d8e614dbd6102dcf58