[INFO] cloning repository https://github.com/Ersikan/kernul
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ersikan/kernul" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErsikan%2Fkernul", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErsikan%2Fkernul'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e737258eb21a759ea08441d1f5b08c16e78287b6
[INFO] testing Ersikan/kernul against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErsikan%2Fkernul" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Ersikan/kernul on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-5/source/.cargo/config
[INFO] started tweaking git repo https://github.com/Ersikan/kernul
[INFO] finished tweaking git repo https://github.com/Ersikan/kernul
[INFO] tweaked toml for git repo https://github.com/Ersikan/kernul written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/Ersikan/kernul already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a761eae0afd454651e47062f02a777e9cf64b2aaabccb0a0a3dbd0cfb831008
[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" "3a761eae0afd454651e47062f02a777e9cf64b2aaabccb0a0a3dbd0cfb831008", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a761eae0afd454651e47062f02a777e9cf64b2aaabccb0a0a3dbd0cfb831008", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a761eae0afd454651e47062f02a777e9cf64b2aaabccb0a0a3dbd0cfb831008", kill_on_drop: false }`
[INFO] [stdout] 3a761eae0afd454651e47062f02a777e9cf64b2aaabccb0a0a3dbd0cfb831008
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54a9ae393448597abfa9b641efba466985ca905211517c828e6e87ef0721e451
[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" "54a9ae393448597abfa9b641efba466985ca905211517c828e6e87ef0721e451", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling volatile v0.2.6
[INFO] [stderr]    Compiling bitfield v0.13.2
[INFO] [stderr]    Compiling kernul v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stdout] warning: unused variable: `selector`
[INFO] [stdout]   --> src/interrupts/idt.rs:46:23
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn new(base: u32, selector: u8, gate_type: GateType, privilege: u8) -> IdtEntry {
[INFO] [stdout]    |                       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_selector`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0503]: cannot use `self.buffer[_]` because it was mutably borrowed
[INFO] [stdout]    --> src/vga_driver.rs:127:49
[INFO] [stdout]     |
[INFO] [stdout] 127 |                 self.buffer[line][column].write(self.buffer[line + 1][column].read());
[INFO] [stdout]     |                 -----------------         ----- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ use of borrowed `self.buffer[_]`
[INFO] [stdout]     |                 |                         |
[INFO] [stdout]     |                 |                         borrow later used by call
[INFO] [stdout]     |                 borrow of `self.buffer[_]` occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `self.buffer[_][_]` as immutable because it is also borrowed as mutable
[INFO] [stdout]    --> src/vga_driver.rs:127:49
[INFO] [stdout]     |
[INFO] [stdout] 127 |                 self.buffer[line][column].write(self.buffer[line + 1][column].read());
[INFO] [stdout]     |                 -----------------         ----- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ immutable borrow occurs here
[INFO] [stdout]     |                 |                         |
[INFO] [stdout]     |                 |                         mutable borrow later used by call
[INFO] [stdout]     |                 mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0502, E0503.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kernul`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "54a9ae393448597abfa9b641efba466985ca905211517c828e6e87ef0721e451", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54a9ae393448597abfa9b641efba466985ca905211517c828e6e87ef0721e451", kill_on_drop: false }`
[INFO] [stdout] 54a9ae393448597abfa9b641efba466985ca905211517c828e6e87ef0721e451