[INFO] cloning repository https://github.com/0xB0000xDEAD/rust_on_stm32
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/0xB0000xDEAD/rust_on_stm32" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xB0000xDEAD%2Frust_on_stm32", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xB0000xDEAD%2Frust_on_stm32'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a48a772bc431b996a76f7a862853c77b8aea5926
[INFO] documenting 0xB0000xDEAD/rust_on_stm32 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%2F0xB0000xDEAD%2Frust_on_stm32" "/workspace/builds/worker-104/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-104/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/0xB0000xDEAD/rust_on_stm32 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-104/source/.cargo/config
[INFO] started tweaking git repo https://github.com/0xB0000xDEAD/rust_on_stm32
[INFO] finished tweaking git repo https://github.com/0xB0000xDEAD/rust_on_stm32
[INFO] tweaked toml for git repo https://github.com/0xB0000xDEAD/rust_on_stm32 written to /workspace/builds/worker-104/source/Cargo.toml
[INFO] crate git repo https://github.com/0xB0000xDEAD/rust_on_stm32 already has a lockfile, it will not be regenerated
[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-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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] a0154dee9e5dbb93c183b24421016b5608d2a79477be2138c6f44258a36c398d
[INFO] running `Command { std: "docker" "start" "-a" "a0154dee9e5dbb93c183b24421016b5608d2a79477be2138c6f44258a36c398d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0154dee9e5dbb93c183b24421016b5608d2a79477be2138c6f44258a36c398d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0154dee9e5dbb93c183b24421016b5608d2a79477be2138c6f44258a36c398d", kill_on_drop: false }`
[INFO] [stdout] a0154dee9e5dbb93c183b24421016b5608d2a79477be2138c6f44258a36c398d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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] 8025de0f32a26259bfffc248918911d1558c0539ea2f696eb3f7a08aacbb4ece
[INFO] running `Command { std: "docker" "start" "-a" "8025de0f32a26259bfffc248918911d1558c0539ea2f696eb3f7a08aacbb4ece", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cortex-m v0.7.2
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling cortex-m-rt v0.6.13
[INFO] [stderr]    Compiling cortex-m v0.6.7
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.7
[INFO] [stderr]    Compiling embedded-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking embedded-hal v0.2.5
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking aligned v0.3.4
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]  Documenting embedded-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.53s
[INFO] running `Command { std: "docker" "inspect" "8025de0f32a26259bfffc248918911d1558c0539ea2f696eb3f7a08aacbb4ece", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8025de0f32a26259bfffc248918911d1558c0539ea2f696eb3f7a08aacbb4ece", kill_on_drop: false }`
[INFO] [stdout] 8025de0f32a26259bfffc248918911d1558c0539ea2f696eb3f7a08aacbb4ece