[INFO] fetching crate esp8266-hal 0.5.1...
[INFO] testing esp8266-hal-0.5.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate esp8266-hal 0.5.1 into /workspace/builds/worker-6-tc2/source
[INFO] removed /workspace/builds/worker-6-tc2/source/.cargo/config
[INFO] removed /workspace/builds/worker-6-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate esp8266-hal 0.5.1
[INFO] finished tweaking crates.io crate esp8266-hal 0.5.1
[INFO] tweaked toml for crates.io crate esp8266-hal 0.5.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate esp8266-hal 0.5.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate esp8266-hal 0.5.1 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 161f7939d8c8db5b5f5f300ba8ac828e50954ea57f08d7509819f903f7b89dc6
[INFO] running `Command { std: "docker" "start" "-a" "161f7939d8c8db5b5f5f300ba8ac828e50954ea57f08d7509819f903f7b89dc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "161f7939d8c8db5b5f5f300ba8ac828e50954ea57f08d7509819f903f7b89dc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "161f7939d8c8db5b5f5f300ba8ac828e50954ea57f08d7509819f903f7b89dc6", kill_on_drop: false }`
[INFO] [stdout] 161f7939d8c8db5b5f5f300ba8ac828e50954ea57f08d7509819f903f7b89dc6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f206a8504796f4cdb31d1bdb9a874437df670fe4917e3bc6e995f5800ea9768d
[INFO] running `Command { std: "docker" "start" "-a" "f206a8504796f4cdb31d1bdb9a874437df670fe4917e3bc6e995f5800ea9768d", kill_on_drop: false }`
[INFO] [stderr] warning: profile package spec `compiler_builtins` in profile `dev` did not match any packages
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling anyhow v1.0.57
[INFO] [stderr]    Compiling xtensa-lx v0.7.0
[INFO] [stderr]    Compiling regex-syntax v0.6.26
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling strum v0.24.0
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling bare-metal v1.0.0
[INFO] [stderr]    Compiling r0 v1.0.0
[INFO] [stderr]    Compiling esp8266 v0.6.0
[INFO] [stderr]    Compiling nb v1.0.0
[INFO] [stderr]    Compiling mutex-trait v0.2.0
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling esp8266-hal v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling vcell v0.1.3
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling paste v1.0.7
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/xtensa-lx-0.7.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(asm_experimental_arch)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `xtensa-lx` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f206a8504796f4cdb31d1bdb9a874437df670fe4917e3bc6e995f5800ea9768d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f206a8504796f4cdb31d1bdb9a874437df670fe4917e3bc6e995f5800ea9768d", kill_on_drop: false }`
[INFO] [stdout] f206a8504796f4cdb31d1bdb9a874437df670fe4917e3bc6e995f5800ea9768d