[INFO] fetching crate os_essentials 0.0.3...
[INFO] testing os_essentials-0.0.3 against master#1f7f8ea0721a3b1eb73e6c6d25cccb371434b320 for pr-154065-1
[INFO] extracting crate os_essentials 0.0.3 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate os_essentials 0.0.3
[INFO] finished tweaking crates.io crate os_essentials 0.0.3
[INFO] tweaked toml for crates.io crate os_essentials 0.0.3 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate os_essentials 0.0.3 on toolchain 1f7f8ea0721a3b1eb73e6c6d25cccb371434b320
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding heapless v0.8.0 (available: v0.9.2)
[INFO] [stderr]       Adding spin v0.9.8 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded x86_64 v0.15.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b4155b8c89f3eaed3596d36b0e52be29e4eecb93026cccd9f2997faf42f9d02
[INFO] running `Command { std: "docker" "start" "-a" "7b4155b8c89f3eaed3596d36b0e52be29e4eecb93026cccd9f2997faf42f9d02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b4155b8c89f3eaed3596d36b0e52be29e4eecb93026cccd9f2997faf42f9d02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b4155b8c89f3eaed3596d36b0e52be29e4eecb93026cccd9f2997faf42f9d02", kill_on_drop: false }`
[INFO] [stdout] 7b4155b8c89f3eaed3596d36b0e52be29e4eecb93026cccd9f2997faf42f9d02
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 899fac69c7b4319d2eb81aa0e4cac4f29d48309b5d7662fbc4081f7003b0ff69
[INFO] running `Command { std: "docker" "start" "-a" "899fac69c7b4319d2eb81aa0e4cac4f29d48309b5d7662fbc4081f7003b0ff69", kill_on_drop: false }`
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling bit_field v0.10.3
[INFO] [stderr]    Compiling volatile v0.4.6
[INFO] [stderr]    Compiling x86_64 v0.15.4
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling os_essentials v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `AtomicUsize` and `Ordering`
[INFO] [stdout]  --> src/vga.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]   |                          ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ptr::null_mut`
[INFO] [stdout]   --> src/vga.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use core::ptr::null_mut;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/uxstring.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/osalloc.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_cell`
[INFO] [stdout]   --> src/vga.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let current_cell = unsafe { VGA_MEMORY.add(offset).read_volatile() };
[INFO] [stdout]    |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_cell`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_size`
[INFO] [stdout]    --> src/vga.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |         let line_size = VGA_WIDTH;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.24s
[INFO] running `Command { std: "docker" "inspect" "899fac69c7b4319d2eb81aa0e4cac4f29d48309b5d7662fbc4081f7003b0ff69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "899fac69c7b4319d2eb81aa0e4cac4f29d48309b5d7662fbc4081f7003b0ff69", kill_on_drop: false }`
[INFO] [stdout] 899fac69c7b4319d2eb81aa0e4cac4f29d48309b5d7662fbc4081f7003b0ff69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e050e044827138bf14689d6b7ccdd689e273dc631d41124520e833c6a086a6b7
[INFO] running `Command { std: "docker" "start" "-a" "e050e044827138bf14689d6b7ccdd689e273dc631d41124520e833c6a086a6b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling os_essentials v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `AtomicUsize` and `Ordering`
[INFO] [stdout]  --> src/vga.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]   |                          ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ptr::null_mut`
[INFO] [stdout]   --> src/vga.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use core::ptr::null_mut;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/uxstring.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/osalloc.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_cell`
[INFO] [stdout]   --> src/vga.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let current_cell = unsafe { VGA_MEMORY.add(offset).read_volatile() };
[INFO] [stdout]    |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_cell`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_size`
[INFO] [stdout]    --> src/vga.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |         let line_size = VGA_WIDTH;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AtomicUsize` and `Ordering`
[INFO] [stdout]  --> src/vga.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]   |                          ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ptr::null_mut`
[INFO] [stdout]   --> src/vga.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use core::ptr::null_mut;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/uxstring.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/osalloc.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_cell`
[INFO] [stdout]   --> src/vga.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let current_cell = unsafe { VGA_MEMORY.add(offset).read_volatile() };
[INFO] [stdout]    |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_cell`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_size`
[INFO] [stdout]    --> src/vga.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |         let line_size = VGA_WIDTH;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/deps/rustcUuH4D5/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-*,libgetopts-*,librustc_std_workspace_std-*,libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,libcfg_if-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*}.rlib" "/opt/rustwide/target/debug/deps/{libspin-6aca1d391314f776,liblock_api-ec1e77aca18a533b,libscopeguard-d52bd00767847e44,libx86_64-cd1a81e4f0e25317,libvolatile-0f8215778742703b,libbitflags-5c085993cab0beac,libbit_field-04a02c08921d3c68}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/opt/rustwide/target/debug/deps/rustcUuH4D5/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/os_essentials-bc517f370047abb0" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: undefined symbol: main
[INFO] [stdout]           >>> referenced by /usr/lib/gcc/x86_64-linux-gnu/13/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `os_essentials` (lib test) due to 1 previous error; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e050e044827138bf14689d6b7ccdd689e273dc631d41124520e833c6a086a6b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e050e044827138bf14689d6b7ccdd689e273dc631d41124520e833c6a086a6b7", kill_on_drop: false }`
[INFO] [stdout] e050e044827138bf14689d6b7ccdd689e273dc631d41124520e833c6a086a6b7
