[INFO] fetching crate valord-map 0.10.0...
[INFO] testing valord-map-0.10.0 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] extracting crate valord-map 0.10.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate valord-map 0.10.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate valord-map 0.10.0
[INFO] tweaked toml for crates.io crate valord-map 0.10.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate valord-map 0.10.0 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate valord-map 0.10.0 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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 56aa9cc49a739ce310c72041d0dc313b44a994b18a9b8a777bb3e1c814ed6495
[INFO] running `Command { std: "docker" "start" "-a" "56aa9cc49a739ce310c72041d0dc313b44a994b18a9b8a777bb3e1c814ed6495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56aa9cc49a739ce310c72041d0dc313b44a994b18a9b8a777bb3e1c814ed6495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56aa9cc49a739ce310c72041d0dc313b44a994b18a9b8a777bb3e1c814ed6495", kill_on_drop: false }`
[INFO] [stdout] 56aa9cc49a739ce310c72041d0dc313b44a994b18a9b8a777bb3e1c814ed6495
[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44d0f8c8b9e72bd2071b9e1a1b1b9a0f7dbea1efc4ed32242c3a4ada48f6ac93
[INFO] running `Command { std: "docker" "start" "-a" "44d0f8c8b9e72bd2071b9e1a1b1b9a0f7dbea1efc4ed32242c3a4ada48f6ac93", kill_on_drop: false }`
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling valord-map v0.10.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/lib.rs:73:19
[INFO] [stdout]    |
[INFO] [stdout] 73 |         } else if let Some(free_index) = self.free_indexs.front().copied()
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/lib.rs:74:16
[INFO] [stdout]    |
[INFO] [stdout] 74 |             && let Some((k, v)) = self.map.get_index_mut2(free_index)
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `valord-map` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "44d0f8c8b9e72bd2071b9e1a1b1b9a0f7dbea1efc4ed32242c3a4ada48f6ac93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44d0f8c8b9e72bd2071b9e1a1b1b9a0f7dbea1efc4ed32242c3a4ada48f6ac93", kill_on_drop: false }`
[INFO] [stdout] 44d0f8c8b9e72bd2071b9e1a1b1b9a0f7dbea1efc4ed32242c3a4ada48f6ac93