[INFO] fetching crate wookong-solo 0.1.4...
[INFO] checking wookong-solo-0.1.4 against beta for pr-78714
[INFO] extracting crate wookong-solo 0.1.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate wookong-solo 0.1.4 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wookong-solo 0.1.4
[INFO] finished tweaking crates.io crate wookong-solo 0.1.4
[INFO] tweaked toml for crates.io crate wookong-solo 0.1.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39a1f85a32c86cc881d811bcb02818207d8c36f250890a9033d88d54a07f701b
[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" "39a1f85a32c86cc881d811bcb02818207d8c36f250890a9033d88d54a07f701b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39a1f85a32c86cc881d811bcb02818207d8c36f250890a9033d88d54a07f701b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39a1f85a32c86cc881d811bcb02818207d8c36f250890a9033d88d54a07f701b", kill_on_drop: false }`
[INFO] [stdout] 39a1f85a32c86cc881d811bcb02818207d8c36f250890a9033d88d54a07f701b
[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" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--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] b3dbd02a634b27aa8bec854e736c31adf2c24ea2d981452d9d1573eb81bf97aa
[INFO] running `Command { std: "docker" "start" "-a" "b3dbd02a634b27aa8bec854e736c31adf2c24ea2d981452d9d1573eb81bf97aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling wookong-solo v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: src/driver/os_uart.c: In function 'uart_init':
[INFO] [stderr] warning: src/driver/os_uart.c:26:8: warning: 'fd' is used uninitialized in this function [-Wuninitialized]
[INFO] [stderr] warning:    26 |     if (fd < 0) /* Error Checking */
[INFO] [stderr] warning:       |        ^
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.84s
[INFO] running `Command { std: "docker" "inspect" "b3dbd02a634b27aa8bec854e736c31adf2c24ea2d981452d9d1573eb81bf97aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3dbd02a634b27aa8bec854e736c31adf2c24ea2d981452d9d1573eb81bf97aa", kill_on_drop: false }`
[INFO] [stdout] b3dbd02a634b27aa8bec854e736c31adf2c24ea2d981452d9d1573eb81bf97aa