[INFO] fetching crate eight-puzzle 1.1.0...
[INFO] checking eight-puzzle-1.1.0 against try#901d6c1c62d7c61e05469e996c297476078ee06b for pr-157082
[INFO] extracting crate eight-puzzle 1.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate eight-puzzle 1.1.0
[INFO] finished tweaking crates.io crate eight-puzzle 1.1.0
[INFO] tweaked toml for crates.io crate eight-puzzle 1.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate eight-puzzle 1.1.0 on toolchain 901d6c1c62d7c61e05469e996c297476078ee06b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901d6c1c62d7c61e05469e996c297476078ee06b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate eight-puzzle 1.1.0 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" "+901d6c1c62d7c61e05469e996c297476078ee06b" "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/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f9b0cf29ce0821266f9a28b14a91466551db7a9d14d9a1b7a8f2b0ba77306e12
[INFO] running `Command { std: "docker" "start" "f9b0cf29ce0821266f9a28b14a91466551db7a9d14d9a1b7a8f2b0ba77306e12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f9b0cf29ce0821266f9a28b14a91466551db7a9d14d9a1b7a8f2b0ba77306e12" "/opt/rustwide/cargo-home/bin/cargo" "+901d6c1c62d7c61e05469e996c297476078ee06b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9b0cf29ce0821266f9a28b14a91466551db7a9d14d9a1b7a8f2b0ba77306e12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f9b0cf29ce0821266f9a28b14a91466551db7a9d14d9a1b7a8f2b0ba77306e12" "/opt/rustwide/cargo-home/bin/cargo" "+901d6c1c62d7c61e05469e996c297476078ee06b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling wayland-scanner v0.21.13
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]     Checking piston-float v1.0.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking piston-viewport v1.0.0
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stdout] error[E0658]: use of unstable library feature `core_intrinsics`: intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rand_core-0.4.2/src/impls.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use core::intrinsics::transmute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(core_intrinsics)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-05-28; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling gl_generator v0.10.0
[INFO] [stderr]     Checking piston-graphics_api_version v0.2.0
[INFO] [stderr]     Checking downcast-rs v1.1.1
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rand_core` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f9b0cf29ce0821266f9a28b14a91466551db7a9d14d9a1b7a8f2b0ba77306e12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9b0cf29ce0821266f9a28b14a91466551db7a9d14d9a1b7a8f2b0ba77306e12", kill_on_drop: false }`
[INFO] [stdout] f9b0cf29ce0821266f9a28b14a91466551db7a9d14d9a1b7a8f2b0ba77306e12
