[INFO] cloning repository https://github.com/luojia65/librv4rs-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/luojia65/librv4rs-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluojia65%2Flibrv4rs-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluojia65%2Flibrv4rs-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dfc1bb18d05c0362b8890d294dda2f34d5473a49
[INFO] documenting luojia65/librv4rs-example against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluojia65%2Flibrv4rs-example" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/luojia65/librv4rs-example on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/.cargo/config
[INFO] started tweaking git repo https://github.com/luojia65/librv4rs-example
[INFO] finished tweaking git repo https://github.com/luojia65/librv4rs-example
[INFO] tweaked toml for git repo https://github.com/luojia65/librv4rs-example written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/luojia65/librv4rs-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gd32vf103-hal v0.0.0
[INFO] [stderr]   Downloaded gd32vf103-pac v0.1.0
[INFO] [stderr]   Downloaded riscv-rt v0.6.1
[INFO] [stderr]   Downloaded riscv v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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-2020-08-29" "metadata" "--no-deps" "--format-version=1", 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] 825419af84baae344ef5c484d5f56984a96a57a9b6a763a14adb8e386106479c
[INFO] running `Command { std: "docker" "start" "-a" "825419af84baae344ef5c484d5f56984a96a57a9b6a763a14adb8e386106479c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "825419af84baae344ef5c484d5f56984a96a57a9b6a763a14adb8e386106479c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "825419af84baae344ef5c484d5f56984a96a57a9b6a763a14adb8e386106479c", kill_on_drop: false }`
[INFO] [stdout] 825419af84baae344ef5c484d5f56984a96a57a9b6a763a14adb8e386106479c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 550caf9415185e0d669a1265d8003b3722f8f096d890e9087b766ccedcd48112
[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" "550caf9415185e0d669a1265d8003b3722f8f096d890e9087b766ccedcd48112", kill_on_drop: false }`
[INFO] [stderr]    Compiling riscv v0.5.4
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]    Compiling riscv-rt v0.6.1
[INFO] [stderr]     Checking vcell v0.1.2
[INFO] [stderr]     Checking nb v0.1.2
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]    Compiling librv4rs-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]     Checking embedded-hal v0.2.3
[INFO] [stderr]     Checking gd32vf103-pac v0.1.0
[INFO] [stderr]    Compiling riscv-rt-macros v0.1.6
[INFO] [stderr]     Checking gd32vf103-hal v0.0.0
[INFO] [stderr]  Documenting librv4rs-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.76s
[INFO] running `Command { std: "docker" "inspect" "550caf9415185e0d669a1265d8003b3722f8f096d890e9087b766ccedcd48112", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "550caf9415185e0d669a1265d8003b3722f8f096d890e9087b766ccedcd48112", kill_on_drop: false }`
[INFO] [stdout] 550caf9415185e0d669a1265d8003b3722f8f096d890e9087b766ccedcd48112