[INFO] fetching crate blud 0.0.0...
[INFO] checking blud-0.0.0 against master#82310651b93a594a3fd69015e1562186a080d94c for pr-145770
[INFO] extracting crate blud 0.0.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate blud 0.0.0
[INFO] finished tweaking crates.io crate blud 0.0.0
[INFO] tweaked toml for crates.io crate blud 0.0.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate blud 0.0.0 on toolchain 82310651b93a594a3fd69015e1562186a080d94c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "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" "+82310651b93a594a3fd69015e1562186a080d94c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atools v0.1.7
[INFO] [stderr]   Downloaded mattr v0.0.2
[INFO] [stderr]   Downloaded vecto v0.1.1
[INFO] [stderr]   Downloaded umath v0.0.7
[INFO] [stderr]   Downloaded clipline v0.1.2
[INFO] [stderr]   Downloaded hinted v0.0.2
[INFO] [stderr]   Downloaded lower-macros v0.2.8
[INFO] [stderr]   Downloaded array_chunks v1.0.0
[INFO] [stderr]   Downloaded lower v0.2.0
[INFO] [stderr]   Downloaded fimg v0.4.47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8b01fb7d0738d923c13b427dd19ac3926d09da4fe8fd3981c4b5c6f38ddfe46
[INFO] running `Command { std: "docker" "start" "-a" "a8b01fb7d0738d923c13b427dd19ac3926d09da4fe8fd3981c4b5c6f38ddfe46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8b01fb7d0738d923c13b427dd19ac3926d09da4fe8fd3981c4b5c6f38ddfe46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8b01fb7d0738d923c13b427dd19ac3926d09da4fe8fd3981c4b5c6f38ddfe46", kill_on_drop: false }`
[INFO] [stdout] a8b01fb7d0738d923c13b427dd19ac3926d09da4fe8fd3981c4b5c6f38ddfe46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5d4a2edd652725cad09002235551bd26012390d34087cd3cc8dca9557bf34da2
[INFO] running `Command { std: "docker" "start" "-a" "5d4a2edd652725cad09002235551bd26012390d34087cd3cc8dca9557bf34da2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]     Checking umath v0.0.7
[INFO] [stderr]     Checking array_chunks v1.0.0
[INFO] [stderr]     Checking clipline v0.1.2
[INFO] [stderr]     Checking hinted v0.0.2
[INFO] [stderr]     Checking atools v0.1.7
[INFO] [stderr]     Checking mattr v0.0.2
[INFO] [stderr]     Checking iai v0.1.1
[INFO] [stderr]     Checking vecto v0.1.1
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling lower-macros v0.2.8
[INFO] [stderr]     Checking lower v0.2.0
[INFO] [stderr]     Checking fimg v0.4.47
[INFO] [stdout] error[E0658]: use of unstable library feature `iter_chain`: recently added
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/fimg-0.4.47/src/lib.rs:699:21
[INFO] [stdout]     |
[INFO] [stdout] 699 |                     std::iter::chain(
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #125964 <https://github.com/rust-lang/rust/issues/125964> for more information
[INFO] [stdout]     = help: add `#![feature(iter_chain)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-07-18; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fimg` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "5d4a2edd652725cad09002235551bd26012390d34087cd3cc8dca9557bf34da2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d4a2edd652725cad09002235551bd26012390d34087cd3cc8dca9557bf34da2", kill_on_drop: false }`
[INFO] [stdout] 5d4a2edd652725cad09002235551bd26012390d34087cd3cc8dca9557bf34da2
