[INFO] cloning repository https://github.com/AnyTimeTraveler/rust_on_attiny85_experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AnyTimeTraveler/rust_on_attiny85_experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnyTimeTraveler%2Frust_on_attiny85_experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnyTimeTraveler%2Frust_on_attiny85_experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3402e13c2de4a971b546ea41004e16fe75ee5130
[INFO] documenting AnyTimeTraveler/rust_on_attiny85_experiment against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnyTimeTraveler%2Frust_on_attiny85_experiment" "/workspace/builds/worker-22/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-22/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AnyTimeTraveler/rust_on_attiny85_experiment on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-22/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/AnyTimeTraveler/rust_on_attiny85_experiment
[INFO] finished tweaking git repo https://github.com/AnyTimeTraveler/rust_on_attiny85_experiment
[INFO] tweaked toml for git repo https://github.com/AnyTimeTraveler/rust_on_attiny85_experiment written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate git repo https://github.com/AnyTimeTraveler/rust_on_attiny85_experiment already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1053d75fa53962c7b374d173b1f342ace47a05eff38320486d566cb52b36c4ee
[INFO] running `Command { std: "docker" "start" "-a" "1053d75fa53962c7b374d173b1f342ace47a05eff38320486d566cb52b36c4ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1053d75fa53962c7b374d173b1f342ace47a05eff38320486d566cb52b36c4ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1053d75fa53962c7b374d173b1f342ace47a05eff38320486d566cb52b36c4ee", kill_on_drop: false }`
[INFO] [stdout] 1053d75fa53962c7b374d173b1f342ace47a05eff38320486d566cb52b36c4ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b23578f69adef7c69a0cfdbcd53cc3056e736131dfef8c551271ceb36d09d818
[INFO] running `Command { std: "docker" "start" "-a" "b23578f69adef7c69a0cfdbcd53cc3056e736131dfef8c551271ceb36d09d818", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling avr-device-macros v0.3.2
[INFO] [stderr]     Checking avr-device v0.3.2
[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/avr-device-0.3.2/src/lib.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![feature(llvm_asm)]
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `llvm_asm`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-device-0.3.2/src/lib.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![feature(llvm_asm)]
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `avr-device` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "b23578f69adef7c69a0cfdbcd53cc3056e736131dfef8c551271ceb36d09d818", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b23578f69adef7c69a0cfdbcd53cc3056e736131dfef8c551271ceb36d09d818", kill_on_drop: false }`
[INFO] [stdout] b23578f69adef7c69a0cfdbcd53cc3056e736131dfef8c551271ceb36d09d818