[INFO] updating cached repository plutolove/SimpleOS
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/plutolove/SimpleOS
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/plutolove/SimpleOS" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/plutolove/SimpleOS"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/plutolove/SimpleOS'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/plutolove/SimpleOS" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/plutolove/SimpleOS"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/plutolove/SimpleOS'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0832d77b08310bde10e679869dd3b5b2dad46f97
[INFO] sha for GitHub repo plutolove/SimpleOS: 0832d77b08310bde10e679869dd3b5b2dad46f97
[INFO] validating manifest of plutolove/SimpleOS on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of plutolove/SimpleOS on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing plutolove/SimpleOS
[INFO] finished frobbing plutolove/SimpleOS
[INFO] frobbed toml for plutolove/SimpleOS written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/plutolove/SimpleOS/Cargo.toml
[INFO] started frobbing plutolove/SimpleOS
[INFO] finished frobbing plutolove/SimpleOS
[INFO] frobbed toml for plutolove/SimpleOS written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/plutolove/SimpleOS/Cargo.toml
[INFO] crate plutolove/SimpleOS already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking plutolove/SimpleOS against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-3/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/plutolove/SimpleOS:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 327f706a1bb031b4d69fa679cb38781165c4a9847d5f5824554ed29a3ac1369e
[INFO] running `"docker" "start" "-a" "327f706a1bb031b4d69fa679cb38781165c4a9847d5f5824554ed29a3ac1369e"`
[INFO] [stderr]    Compiling llvm-tools v0.1.1
[INFO] [stderr]     Checking spin v0.5.0
[INFO] [stderr]     Checking array-init v0.0.4
[INFO] [stderr]    Compiling skeptic v0.5.0
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling bootloader v0.5.3
[INFO] [stderr]    Compiling fixedvec v0.2.3
[INFO] [stderr]     Checking x86_64 v0.3.6
[INFO] [stderr]     Checking SimpleOS v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/vga/mod.rs:152:21
[INFO] [stderr]     |
[INFO] [stderr] 152 |                 0x20...0x7e | b'\n' => self.write_byte(byte),
[INFO] [stderr]     |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `bootloader::BootInfo`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use bootloader::BootInfo;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::fmt::Write`
[INFO] [stderr]   --> src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use core::fmt::Write;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Color`, `Writer`
[INFO] [stderr]   --> src/main.rs:15:11
[INFO] [stderr]    |
[INFO] [stderr] 15 | use vga::{Color, Writer};
[INFO] [stderr]    |           ^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0152]: duplicate lang item found: `panic_impl`.
[INFO] [stderr]   --> src/main.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | / fn panic(_info: &PanicInfo) -> ! {
[INFO] [stderr] 20 | |     loop {}
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: first defined in crate `std`.
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0152`.
[INFO] [stderr] error: Could not compile `SimpleOS`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "327f706a1bb031b4d69fa679cb38781165c4a9847d5f5824554ed29a3ac1369e"`
[INFO] running `"docker" "rm" "-f" "327f706a1bb031b4d69fa679cb38781165c4a9847d5f5824554ed29a3ac1369e"`
[INFO] [stdout] 327f706a1bb031b4d69fa679cb38781165c4a9847d5f5824554ed29a3ac1369e