[INFO] cloning repository https://github.com/joshdelg/krust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/joshdelg/krust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshdelg%2Fkrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshdelg%2Fkrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ce1c4241c2552ebf2bcfaa15c0629c3260ed7d1
[INFO] building joshdelg/krust against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshdelg%2Fkrust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/joshdelg/krust on toolchain 8b8eff55bd72abbb57167bc42222a7f91d41cb0d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/joshdelg/krust
[INFO] finished tweaking git repo https://github.com/joshdelg/krust
[INFO] tweaked toml for git repo https://github.com/joshdelg/krust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/joshdelg/krust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dfbbd278e6debfa82555e4ac89e4da4bdd5143b9ec3e31c4a0e977c0ed74aae9
[INFO] running `Command { std: "docker" "start" "-a" "dfbbd278e6debfa82555e4ac89e4da4bdd5143b9ec3e31c4a0e977c0ed74aae9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dfbbd278e6debfa82555e4ac89e4da4bdd5143b9ec3e31c4a0e977c0ed74aae9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfbbd278e6debfa82555e4ac89e4da4bdd5143b9ec3e31c4a0e977c0ed74aae9", kill_on_drop: false }`
[INFO] [stdout] dfbbd278e6debfa82555e4ac89e4da4bdd5143b9ec3e31c4a0e977c0ed74aae9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e15b9ad4b116b58ce44894a4cb936435cc48deb0fb3066bfaa65f575b56ac3d9
[INFO] running `Command { std: "docker" "start" "-a" "e15b9ad4b116b58ce44894a4cb936435cc48deb0fb3066bfaa65f575b56ac3d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling krust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `lang_items` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:4:29
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core_intrinsics, lang_items, rustc_attrs)]
[INFO] [stdout]   |                             ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `rustc_attrs` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:4:41
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core_intrinsics, lang_items, rustc_attrs)]
[INFO] [stdout]   |                                         ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core_intrinsics, lang_items, rustc_attrs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PUT32`
[INFO] [stdout]  --> src/timer.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     PUT32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `GET32`, `PUT32`, and `dev_barrier`
[INFO] [stdout]  --> src/sw_uart.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     PUT32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     GET32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 6 |     dev_barrier
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]   --> src/lib.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub extern fn krust_entry() {
[INFO] [stdout]    |     ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `#[no_mangle]` cannot be used on internal language items
[INFO] [stdout]   --> src/lib.rs:61:1
[INFO] [stdout]    |
[INFO] [stdout] 61 | #[no_mangle]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 | fn panic(_info: &PanicInfo) -> ! {
[INFO] [stdout]    | -------------------------------- should be the internal language item
[INFO] [stdout]    |
[INFO] [stdout]    = note: Rustc requires this item to have a specific mangled name.
[INFO] [stdout]    = note: If you are trying to prevent mangling to ease debugging, many
[INFO] [stdout]    = note: debuggers support a command such as `rbreak rust_begin_unwind` to
[INFO] [stdout]    = note: match `.*rust_begin_unwind.*` instead of `break rust_begin_unwind` on a specific name
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hz`
[INFO] [stdout]  --> src/servo.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let hz = 50;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_hz`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hi_period_us`
[INFO] [stdout]  --> src/servo.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let hi_period_us = on_us;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hi_period_us`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `krust` (lib) due to 1 previous error; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e15b9ad4b116b58ce44894a4cb936435cc48deb0fb3066bfaa65f575b56ac3d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e15b9ad4b116b58ce44894a4cb936435cc48deb0fb3066bfaa65f575b56ac3d9", kill_on_drop: false }`
[INFO] [stdout] e15b9ad4b116b58ce44894a4cb936435cc48deb0fb3066bfaa65f575b56ac3d9