[INFO] fetching crate xmail 0.1.15...
[INFO] building xmail-0.1.15 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate xmail 0.1.15 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate xmail 0.1.15
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate xmail 0.1.15
[INFO] tweaked toml for crates.io crate xmail 0.1.15 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate xmail 0.1.15 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate xmail 0.1.15 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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xstr v0.1.11
[INFO] [stderr]   Downloaded punycode v0.4.1
[INFO] [stderr]   Downloaded xtld v0.1.6
[INFO] [stderr]   Downloaded psl v2.1.90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14302bbc8f93ae3c05f33ce84d2400744fbfd795b0e22f26332831e6abf02468
[INFO] running `Command { std: "docker" "start" "-a" "14302bbc8f93ae3c05f33ce84d2400744fbfd795b0e22f26332831e6abf02468", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14302bbc8f93ae3c05f33ce84d2400744fbfd795b0e22f26332831e6abf02468", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14302bbc8f93ae3c05f33ce84d2400744fbfd795b0e22f26332831e6abf02468", kill_on_drop: false }`
[INFO] [stdout] 14302bbc8f93ae3c05f33ce84d2400744fbfd795b0e22f26332831e6abf02468
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73b596809214bcd4fa661457594cbb8aa1e3077f749e10bf8cb6e24350e3e877
[INFO] running `Command { std: "docker" "start" "-a" "73b596809214bcd4fa661457594cbb8aa1e3077f749e10bf8cb6e24350e3e877", kill_on_drop: false }`
[INFO] [stderr]    Compiling psl-types v2.0.11
[INFO] [stderr]    Compiling xstr v0.1.11
[INFO] [stderr]    Compiling punycode v0.4.1
[INFO] [stderr]    Compiling psl v2.1.90
[INFO] [stderr]    Compiling xtld v0.1.6
[INFO] [stderr]    Compiling xmail v0.1.15 (/opt/rustwide/workdir)
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/lib.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |         && let Ok(i) = punycode::decode(&i[3..])
[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 `xmail` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "73b596809214bcd4fa661457594cbb8aa1e3077f749e10bf8cb6e24350e3e877", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73b596809214bcd4fa661457594cbb8aa1e3077f749e10bf8cb6e24350e3e877", kill_on_drop: false }`
[INFO] [stdout] 73b596809214bcd4fa661457594cbb8aa1e3077f749e10bf8cb6e24350e3e877