[INFO] fetching crate panic-rtt-target 0.1.1...
[INFO] testing panic-rtt-target-0.1.1 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate panic-rtt-target 0.1.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate panic-rtt-target 0.1.1 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate panic-rtt-target 0.1.1
[INFO] finished tweaking crates.io crate panic-rtt-target 0.1.1
[INFO] tweaked toml for crates.io crate panic-rtt-target 0.1.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rtt-target v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "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] 3b1b032cce03d74f0777f9fb1c3628938c49b3e99f275861b45c992593a26f47
[INFO] running `Command { std: "docker" "start" "-a" "3b1b032cce03d74f0777f9fb1c3628938c49b3e99f275861b45c992593a26f47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b1b032cce03d74f0777f9fb1c3628938c49b3e99f275861b45c992593a26f47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b1b032cce03d74f0777f9fb1c3628938c49b3e99f275861b45c992593a26f47", kill_on_drop: false }`
[INFO] [stdout] 3b1b032cce03d74f0777f9fb1c3628938c49b3e99f275861b45c992593a26f47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dcdf422c4656a4d5791358d217d91ac9ff1eea6ef00fefb1e1c10ddf5092a7e5
[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" "dcdf422c4656a4d5791358d217d91ac9ff1eea6ef00fefb1e1c10ddf5092a7e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling ufmt-write v0.1.0
[INFO] [stderr]    Compiling rtt-target v0.2.2
[INFO] [stderr]    Compiling panic-rtt-target v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: You must specify a platform feature for panic-rtt-target, such as 'cortex-m'.
[INFO] [stdout] Example:
[INFO] [stdout]   # Cargo.toml
[INFO] [stdout]   panic-rtt-target = { version = "x.y.z", features = ["cortex-m"] }
[INFO] [stdout] 
[INFO] [stdout]   --> src/lib.rs:73:1
[INFO] [stdout]    |
[INFO] [stdout] 73 | / compile_error!(concat!(
[INFO] [stdout] 74 | |     "You must specify a platform feature for panic-rtt-target, such as 'cortex-m'.\r\n",
[INFO] [stdout] 75 | |     "Example:\r\n",
[INFO] [stdout] 76 | |     "  # Cargo.toml\r\n",
[INFO] [stdout] 77 | |     "  panic-rtt-target = { version = \"x.y.z\", features = [\"cortex-m\"] }\r\n"));
[INFO] [stdout]    | |____________________________________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `panic-rtt-target`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "dcdf422c4656a4d5791358d217d91ac9ff1eea6ef00fefb1e1c10ddf5092a7e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcdf422c4656a4d5791358d217d91ac9ff1eea6ef00fefb1e1c10ddf5092a7e5", kill_on_drop: false }`
[INFO] [stdout] dcdf422c4656a4d5791358d217d91ac9ff1eea6ef00fefb1e1c10ddf5092a7e5