[INFO] cloning repository https://github.com/silven/armstrong
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/silven/armstrong" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsilven%2Farmstrong", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsilven%2Farmstrong'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 67cc95946d52c41baf2b4c8a5cad34bc2353cc83
[INFO] testing silven/armstrong against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsilven%2Farmstrong" "/workspace/builds/worker-76/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-76/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/silven/armstrong on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-76/source/.cargo/config
[INFO] started tweaking git repo https://github.com/silven/armstrong
[INFO] finished tweaking git repo https://github.com/silven/armstrong
[INFO] tweaked toml for git repo https://github.com/silven/armstrong written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] crate git repo https://github.com/silven/armstrong already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded volatile-register v0.2.0
[INFO] [stderr]   Downloaded vcell v0.1.0
[INFO] [stderr]   Downloaded cortex-m-semihosting v0.1.3
[INFO] [stderr]   Downloaded r0 v0.2.1
[INFO] [stderr]   Downloaded cortex-m-rt v0.2.4
[INFO] [stderr]   Downloaded aligned v0.1.1
[INFO] [stderr]   Downloaded cortex-m v0.2.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca3c161e25de8d682f5f0b78083c5133c6fee8f357dd7e5c7b065a4f6602a55f
[INFO] running `Command { std: "docker" "start" "-a" "ca3c161e25de8d682f5f0b78083c5133c6fee8f357dd7e5c7b065a4f6602a55f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca3c161e25de8d682f5f0b78083c5133c6fee8f357dd7e5c7b065a4f6602a55f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca3c161e25de8d682f5f0b78083c5133c6fee8f357dd7e5c7b065a4f6602a55f", kill_on_drop: false }`
[INFO] [stdout] ca3c161e25de8d682f5f0b78083c5133c6fee8f357dd7e5c7b065a4f6602a55f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2993abd1e5bcea6217180b7db0dadbcfaf379ef8e76fb0ad762e7de43e185c23
[INFO] running `Command { std: "docker" "start" "-a" "2993abd1e5bcea6217180b7db0dadbcfaf379ef8e76fb0ad762e7de43e185c23", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling armstrong v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:5:41
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(core_intrinsics, lang_items, const_fn, naked_functions)]
[INFO] [stdout]   |                                         ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(core_intrinsics, lang_items, const_fn, naked_functions)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(drop_types_in_const, compiler_builtins_lib)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `drop_types_in_const` has been stable since 1.22.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `crash_uart` should have an upper camel case name
[INFO] [stdout]   --> src/isr.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct crash_uart {
[INFO] [stdout]    |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `CrashUart`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/isr.rs:20:24
[INFO] [stdout]    |
[INFO] [stdout] 20 |                     if (U0LSR_REGISTER.read() & 0x20 != 0) {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0522]: definition of an unknown language item: `panic_fmt`
[INFO] [stdout]   --> src/isr.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | #[lang="panic_fmt"]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^ definition of unknown language item `panic_fmt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: naked functions must contain a single asm block
[INFO] [stdout]   --> src/isr.rs:56:1
[INFO] [stdout]    |
[INFO] [stdout] 56 | / pub unsafe extern "C" fn reset_handler() {
[INFO] [stdout] 57 | |     init_memory();
[INFO] [stdout]    | |     -------------- non-asm is unsupported in naked functions
[INFO] [stdout] 58 | |     start();
[INFO] [stdout]    | |     -------- non-asm is unsupported in naked functions
[INFO] [stdout] 59 | |     abort();
[INFO] [stdout]    | |     -------- non-asm is unsupported in naked functions
[INFO] [stdout] 60 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unsupported_naked_functions)]` 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]    = note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0522, E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0522`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `armstrong`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "2993abd1e5bcea6217180b7db0dadbcfaf379ef8e76fb0ad762e7de43e185c23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2993abd1e5bcea6217180b7db0dadbcfaf379ef8e76fb0ad762e7de43e185c23", kill_on_drop: false }`
[INFO] [stdout] 2993abd1e5bcea6217180b7db0dadbcfaf379ef8e76fb0ad762e7de43e185c23
