Nov 30 10:22:51.990 INFO checking JosephFerano/rust_os against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 30 10:22:51.990 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-7/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +32252761328f59ccfadb1bafb8148c685bc830b3-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 30 10:22:52.161 INFO [stdout] 349c99883c926e33d803d6329f76c9db0f64bd0657b5458f56175d27dd9fa983
Nov 30 10:22:52.168 INFO running `"docker" "start" "-a" "349c99883c926e33d803d6329f76c9db0f64bd0657b5458f56175d27dd9fa983"`
Nov 30 10:22:52.728 INFO [stderr] usermod: no changes
Nov 30 10:22:52.774 INFO [stderr]     Checking volatile v0.2.4
Nov 30 10:22:52.774 INFO [stderr]     Checking multiboot2 v0.7.1
Nov 30 10:22:53.445 INFO [stderr]     Checking first_os v0.1.0 (/source)
Nov 30 10:22:54.052 INFO [stderr] warning: method is never used: `clear_screen`
Nov 30 10:22:54.052 INFO [stderr]    --> src/vga_buffer.rs:121:5
Nov 30 10:22:54.052 INFO [stderr]     |
Nov 30 10:22:54.052 INFO [stderr] 121 |     pub fn clear_screen(&mut self) {
Nov 30 10:22:54.052 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 10:22:54.052 INFO [stderr]     |
Nov 30 10:22:54.052 INFO [stderr]     = note: #[warn(dead_code)] on by default
Nov 30 10:22:54.053 INFO [stderr] 
Nov 30 10:22:54.053 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 30 10:22:54.053 INFO [stderr]   --> src/lib.rs:25:9
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr] 25 | /         writeln!(writer, "    start: 0x{:x}, end: 0x{:x}, size: {:x}",
Nov 30 10:22:54.053 INFO [stderr] 26 | |             area.start_address(),
Nov 30 10:22:54.053 INFO [stderr] 27 | |             area.end_address(),
Nov 30 10:22:54.053 INFO [stderr] 28 | |             area.size());
Nov 30 10:22:54.053 INFO [stderr]    | |_________________________^
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 30 10:22:54.053 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 10:22:54.053 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Nov 30 10:22:54.053 INFO [stderr] 
Nov 30 10:22:54.053 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 30 10:22:54.053 INFO [stderr]   --> src/lib.rs:36:9
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr] 36 | /         writeln!(writer, "    addr: 0x{:x}, size: 0x{:x}, flags: 0x{:x}",
Nov 30 10:22:54.053 INFO [stderr] 37 | |             section.start_address(),
Nov 30 10:22:54.053 INFO [stderr] 38 | |             section.size(),
Nov 30 10:22:54.053 INFO [stderr] 39 | |             section.flags());
Nov 30 10:22:54.053 INFO [stderr]    | |_____________________________^
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 10:22:54.053 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Nov 30 10:22:54.053 INFO [stderr] 
Nov 30 10:22:54.053 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 30 10:22:54.053 INFO [stderr]   --> src/lib.rs:48:5
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr] 48 |     writeln!(writer, "Kernel Start: 0x{:x}, Kernel End: 0x{:x}", kernel_start, kernel_end);
Nov 30 10:22:54.053 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 10:22:54.053 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Nov 30 10:22:54.053 INFO [stderr] 
Nov 30 10:22:54.053 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 30 10:22:54.053 INFO [stderr]   --> src/lib.rs:49:5
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr] 49 |     writeln!(writer, "Multiboot Start: 0x{:x}, Multiboot End: 0x{:x}", multiboot_start, multiboot_end);
Nov 30 10:22:54.053 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 10:22:54.053 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Nov 30 10:22:54.053 INFO [stderr] 
Nov 30 10:22:54.053 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 30 10:22:54.053 INFO [stderr]   --> src/lib.rs:68:5
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr] 68 |     writeln!(writer, "{}", info);
Nov 30 10:22:54.053 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 10:22:54.053 INFO [stderr]    |
Nov 30 10:22:54.053 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 10:22:54.053 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Nov 30 10:22:54.053 INFO [stderr] 
Nov 30 10:22:54.192 INFO [stderr] error[E0152]: duplicate lang item found: `eh_personality`.
Nov 30 10:22:54.192 INFO [stderr]   --> src/lib.rs:63:1
Nov 30 10:22:54.192 INFO [stderr]    |
Nov 30 10:22:54.192 INFO [stderr] 63 | pub extern fn eh_personality() {}
Nov 30 10:22:54.192 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 10:22:54.192 INFO [stderr]    |
Nov 30 10:22:54.192 INFO [stderr]    = note: first defined in crate `panic_unwind`.
Nov 30 10:22:54.192 INFO [stderr] 
Nov 30 10:22:54.192 INFO [stderr] error[E0152]: duplicate lang item found: `panic_impl`.
Nov 30 10:22:54.192 INFO [stderr]   --> src/lib.rs:66:1
Nov 30 10:22:54.192 INFO [stderr]    |
Nov 30 10:22:54.192 INFO [stderr] 66 | / pub extern fn panic(info : &PanicInfo) -> ! {
Nov 30 10:22:54.192 INFO [stderr] 67 | |     let mut writer = Writer::new();
Nov 30 10:22:54.192 INFO [stderr] 68 | |     writeln!(writer, "{}", info);
Nov 30 10:22:54.192 INFO [stderr] 69 | |     loop{}
Nov 30 10:22:54.192 INFO [stderr] 70 | | }
Nov 30 10:22:54.192 INFO [stderr]    | |_^
Nov 30 10:22:54.192 INFO [stderr]    |
Nov 30 10:22:54.193 INFO [stderr]    = note: first defined in crate `std`.
Nov 30 10:22:54.193 INFO [stderr] 
Nov 30 10:22:54.304 INFO [stderr] error: aborting due to 2 previous errors
Nov 30 10:22:54.304 INFO [stderr] 
Nov 30 10:22:54.304 INFO [stderr] For more information about this error, try `rustc --explain E0152`.
Nov 30 10:22:54.309 INFO [stderr] error: Could not compile `first_os`.
Nov 30 10:22:54.309 INFO [stderr] 
Nov 30 10:22:54.309 INFO [stderr] To learn more, run the command again with --verbose.
Nov 30 10:22:54.310 INFO [stderr] su: No module specific data is present
Nov 30 10:22:55.100 INFO running `"docker" "inspect" "349c99883c926e33d803d6329f76c9db0f64bd0657b5458f56175d27dd9fa983"`
Nov 30 10:22:55.468 INFO running `"docker" "rm" "-f" "349c99883c926e33d803d6329f76c9db0f64bd0657b5458f56175d27dd9fa983"`
Nov 30 10:22:55.764 INFO [stdout] 349c99883c926e33d803d6329f76c9db0f64bd0657b5458f56175d27dd9fa983