[INFO] cloning repository https://github.com/Detegr/rust-esp32
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Detegr/rust-esp32" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDetegr%2Frust-esp32", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDetegr%2Frust-esp32'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e67031936e41c0cd351a1b213a93d953a100d2a1
[INFO] checking Detegr/rust-esp32 against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDetegr%2Frust-esp32" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Detegr/rust-esp32 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0/source/.cargo/config
[INFO] started tweaking git repo https://github.com/Detegr/rust-esp32
[INFO] finished tweaking git repo https://github.com/Detegr/rust-esp32
[INFO] tweaked toml for git repo https://github.com/Detegr/rust-esp32 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Detegr/rust-esp32 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb7de556f23d73a37c3482dd5687f7b86ae084c8432490074551fc190f4409d1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fb7de556f23d73a37c3482dd5687f7b86ae084c8432490074551fc190f4409d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb7de556f23d73a37c3482dd5687f7b86ae084c8432490074551fc190f4409d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb7de556f23d73a37c3482dd5687f7b86ae084c8432490074551fc190f4409d1", kill_on_drop: false }`
[INFO] [stdout] fb7de556f23d73a37c3482dd5687f7b86ae084c8432490074551fc190f4409d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e2f55684016db7c615bd687edf2c5ca62f2f6910ca5cd725811efe9ebfe8956d
[INFO] running `Command { std: "docker" "start" "-a" "e2f55684016db7c615bd687edf2c5ca62f2f6910ca5cd725811efe9ebfe8956d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling xtensa-lx v0.3.0
[INFO] [stderr]    Compiling xtensa-lx-rt v0.5.0
[INFO] [stderr]     Checking r0 v1.0.0
[INFO] [stderr]    Compiling esp32 v0.10.0
[INFO] [stderr]     Checking mutex-trait v0.2.0
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling esp32-hal v0.2.0
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xtensa-lx-0.3.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(llvm_asm)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e2f55684016db7c615bd687edf2c5ca62f2f6910ca5cd725811efe9ebfe8956d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2f55684016db7c615bd687edf2c5ca62f2f6910ca5cd725811efe9ebfe8956d", kill_on_drop: false }`
[INFO] [stdout] e2f55684016db7c615bd687edf2c5ca62f2f6910ca5cd725811efe9ebfe8956d