[INFO] cloning repository https://github.com/yuanyuan2100/Arduino-Uno-Themometer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yuanyuan2100/Arduino-Uno-Themometer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuanyuan2100%2FArduino-Uno-Themometer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuanyuan2100%2FArduino-Uno-Themometer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3892f2c6b19152e4b03f3e05539eab1a3fdfe2f
[INFO] documenting yuanyuan2100/Arduino-Uno-Themometer against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuanyuan2100%2FArduino-Uno-Themometer" "/workspace/builds/worker-107/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-107/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yuanyuan2100/Arduino-Uno-Themometer on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-107/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/yuanyuan2100/Arduino-Uno-Themometer
[INFO] finished tweaking git repo https://github.com/yuanyuan2100/Arduino-Uno-Themometer
[INFO] tweaked toml for git repo https://github.com/yuanyuan2100/Arduino-Uno-Themometer written to /workspace/builds/worker-107/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/yuanyuan2100/avr-hal.git`
[INFO] [stderr]     Updating git repository `https://github.com/JohnDoneth/hd44780-driver`
[INFO] [stderr]     Updating git repository `https://github.com/yuanyuan2100/heapless.git`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0dd43216d0fae1e1cd6c833ea83d084b00e69f4c0cc7f04d45ad0079c42e2116
[INFO] running `Command { std: "docker" "start" "-a" "0dd43216d0fae1e1cd6c833ea83d084b00e69f4c0cc7f04d45ad0079c42e2116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0dd43216d0fae1e1cd6c833ea83d084b00e69f4c0cc7f04d45ad0079c42e2116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dd43216d0fae1e1cd6c833ea83d084b00e69f4c0cc7f04d45ad0079c42e2116", kill_on_drop: false }`
[INFO] [stdout] 0dd43216d0fae1e1cd6c833ea83d084b00e69f4c0cc7f04d45ad0079c42e2116
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31378cb0538576265aa3f46f613de59b8498666c296b4b78206a8f372d424413
[INFO] running `Command { std: "docker" "start" "-a" "31378cb0538576265aa3f46f613de59b8498666c296b4b78206a8f372d424413", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling heapless v0.5.6 (https://github.com/yuanyuan2100/heapless.git?rev=82f658ee1ea8c984b4f2d38c904d0f277daf5f2d#82f658ee)
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]     Checking numtoa v0.2.4
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking embedded-hal v0.2.6
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking hd44780-driver v0.4.0 (https://github.com/JohnDoneth/hd44780-driver#cf75a8ab)
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]    Compiling ufmt-macros v0.1.1
[INFO] [stderr]    Compiling avr-device-macros v0.2.3
[INFO] [stderr]     Checking ufmt v0.1.0
[INFO] [stderr]     Checking avr-device v0.2.3
[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-0.2.3/src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | #![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 `avr-device` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "31378cb0538576265aa3f46f613de59b8498666c296b4b78206a8f372d424413", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31378cb0538576265aa3f46f613de59b8498666c296b4b78206a8f372d424413", kill_on_drop: false }`
[INFO] [stdout] 31378cb0538576265aa3f46f613de59b8498666c296b4b78206a8f372d424413
