[INFO] fetching crate rtt-target 0.2.2...
[INFO] checking rtt-target-0.2.2 against try#075992eda207e1647b699c8c8ada67b32ce7b115 for pr-77271
[INFO] extracting crate rtt-target 0.2.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate rtt-target 0.2.2 on toolchain 075992eda207e1647b699c8c8ada67b32ce7b115
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rtt-target 0.2.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate rtt-target 0.2.2
[INFO] tweaked toml for crates.io crate rtt-target 0.2.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate rtt-target 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ufmt-macros v0.1.1
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.12
[INFO] [stderr]   Downloaded as-slice v0.1.3
[INFO] [stderr]   Downloaded ufmt-write v0.1.0
[INFO] [stderr]   Downloaded ufmt v0.1.0
[INFO] [stderr]   Downloaded panic-halt v0.2.0
[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" "+075992eda207e1647b699c8c8ada67b32ce7b115" "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] 6427db2d07a3f43a93dd19eec796a64782a5823b7e7d4fc473b0c1bcd836a708
[INFO] running `Command { std: "docker" "start" "-a" "6427db2d07a3f43a93dd19eec796a64782a5823b7e7d4fc473b0c1bcd836a708", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6427db2d07a3f43a93dd19eec796a64782a5823b7e7d4fc473b0c1bcd836a708", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6427db2d07a3f43a93dd19eec796a64782a5823b7e7d4fc473b0c1bcd836a708", kill_on_drop: false }`
[INFO] [stdout] 6427db2d07a3f43a93dd19eec796a64782a5823b7e7d4fc473b0c1bcd836a708
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "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] ebaa348336965e9d704f911fb05f1a9386a1674bfbd604187920a2daccc0f17a
[INFO] running `Command { std: "docker" "start" "-a" "ebaa348336965e9d704f911fb05f1a9386a1674bfbd604187920a2daccc0f17a", kill_on_drop: false }`
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking rtt-target v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: attribute should be applied to a function or static
[INFO] [stdout]    --> src/lib.rs:177:13
[INFO] [stdout]     |
[INFO] [stdout] 177 |             #[no_mangle]
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout] 178 |             #[link_name = "_SEGGER_RTT"]
[INFO] [stdout] 179 |             static mut CONTROL_BLOCK: MaybeUninit<rtt::RttHeader>;
[INFO] [stdout]     |             ------------------------------------------------------ not a function or static
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: attribute should be applied to a function or static
[INFO] [stdout]    --> src/lib.rs:177:13
[INFO] [stdout]     |
[INFO] [stdout] 177 |             #[no_mangle]
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout] 178 |             #[link_name = "_SEGGER_RTT"]
[INFO] [stdout] 179 |             static mut CONTROL_BLOCK: MaybeUninit<rtt::RttHeader>;
[INFO] [stdout]     |             ------------------------------------------------------ not a function or static
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "ebaa348336965e9d704f911fb05f1a9386a1674bfbd604187920a2daccc0f17a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebaa348336965e9d704f911fb05f1a9386a1674bfbd604187920a2daccc0f17a", kill_on_drop: false }`
[INFO] [stdout] ebaa348336965e9d704f911fb05f1a9386a1674bfbd604187920a2daccc0f17a