[INFO] fetching crate panic-rtt-target 0.1.1...
[INFO] checking panic-rtt-target-0.1.1 against master#d62d3f7fa9a91d933213cc10e20e740608983f64 for pr-77015
[INFO] extracting crate panic-rtt-target 0.1.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate panic-rtt-target 0.1.1 on toolchain d62d3f7fa9a91d933213cc10e20e740608983f64
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "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-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "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] 60beaafd66e2b2a4b0402d5ab6665d3fb9fd0ad9461676544e4f33dba05a8809
[INFO] running `Command { std: "docker" "start" "-a" "60beaafd66e2b2a4b0402d5ab6665d3fb9fd0ad9461676544e4f33dba05a8809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60beaafd66e2b2a4b0402d5ab6665d3fb9fd0ad9461676544e4f33dba05a8809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60beaafd66e2b2a4b0402d5ab6665d3fb9fd0ad9461676544e4f33dba05a8809", kill_on_drop: false }`
[INFO] [stdout] 60beaafd66e2b2a4b0402d5ab6665d3fb9fd0ad9461676544e4f33dba05a8809
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 752543979cc5f1d7b5780fc342c02f1cf7966a2228b92d7ff04d496f3e7906a5
[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" "752543979cc5f1d7b5780fc342c02f1cf7966a2228b92d7ff04d496f3e7906a5", kill_on_drop: false }`
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking rtt-target v0.2.2
[INFO] [stderr]     Checking 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] [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] [stderr] error: could not compile `panic-rtt-target`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "752543979cc5f1d7b5780fc342c02f1cf7966a2228b92d7ff04d496f3e7906a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "752543979cc5f1d7b5780fc342c02f1cf7966a2228b92d7ff04d496f3e7906a5", kill_on_drop: false }`
[INFO] [stdout] 752543979cc5f1d7b5780fc342c02f1cf7966a2228b92d7ff04d496f3e7906a5