[INFO] cloning repository https://github.com/crazycarl/LocationTracker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/crazycarl/LocationTracker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrazycarl%2FLocationTracker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrazycarl%2FLocationTracker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7bdb0eadfd94c29dd2861f491ebaca39f9ea9316
[INFO] documenting crazycarl/LocationTracker against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrazycarl%2FLocationTracker" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crazycarl/LocationTracker on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/crazycarl/LocationTracker
[INFO] finished tweaking git repo https://github.com/crazycarl/LocationTracker
[INFO] tweaked toml for git repo https://github.com/crazycarl/LocationTracker written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/crazycarl/LocationTracker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3721c4d61554543d0eba958e2ec933f64dfa817828aec3bd4c58fdee8e3b045b
[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" "3721c4d61554543d0eba958e2ec933f64dfa817828aec3bd4c58fdee8e3b045b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3721c4d61554543d0eba958e2ec933f64dfa817828aec3bd4c58fdee8e3b045b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3721c4d61554543d0eba958e2ec933f64dfa817828aec3bd4c58fdee8e3b045b", kill_on_drop: false }`
[INFO] [stdout] 3721c4d61554543d0eba958e2ec933f64dfa817828aec3bd4c58fdee8e3b045b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] e7372cf9de24f4dc2c9e5a3153e21c6cfd97ece65f7ac018ad4731b541287dd7
[INFO] running `Command { std: "docker" "start" "-a" "e7372cf9de24f4dc2c9e5a3153e21c6cfd97ece65f7ac018ad4731b541287dd7", 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 v1.0.35
[INFO] [stderr]    Compiling fixed v1.1.0
[INFO] [stderr]    Compiling stm32-usbd v0.5.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling freertos-rust v0.1.2
[INFO] [stderr]    Compiling stm32f3 v0.11.0
[INFO] [stderr]     Checking usb-device v0.2.5
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking generic-array v0.11.1
[INFO] [stderr]     Checking switch-hal v0.3.2
[INFO] [stderr]    Compiling freertos-cargo-build v0.1.1
[INFO] [stderr]     Checking l3gd20 v0.2.0 (https://github.com/bobgates/l3gd20#b8f3959a)
[INFO] [stderr]     Checking itm_logger v0.1.1
[INFO] [stderr]    Compiling location_tracker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/freertos-rust-0.1.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `freertos-rust`.
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[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" "e7372cf9de24f4dc2c9e5a3153e21c6cfd97ece65f7ac018ad4731b541287dd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7372cf9de24f4dc2c9e5a3153e21c6cfd97ece65f7ac018ad4731b541287dd7", kill_on_drop: false }`
[INFO] [stdout] e7372cf9de24f4dc2c9e5a3153e21c6cfd97ece65f7ac018ad4731b541287dd7