[INFO] fetching crate wpj-tg-rcore-tutorial-user 0.0.0...
[INFO] testing wpj-tg-rcore-tutorial-user-0.0.0 against 1.100.0-beta.1 for beta-1.100-2
[INFO] extracting crate wpj-tg-rcore-tutorial-user 0.0.0 into /workspace/builds/worker-5-tc2/source
[INFO] removed /workspace/builds/worker-5-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate wpj-tg-rcore-tutorial-user 0.0.0
[INFO] finished tweaking crates.io crate wpj-tg-rcore-tutorial-user 0.0.0
[INFO] tweaked toml for crates.io crate wpj-tg-rcore-tutorial-user 0.0.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate wpj-tg-rcore-tutorial-user 0.0.0 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate wpj-tg-rcore-tutorial-user 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 219708894fb6a36f16b72f6fec84255d2b9f19145a74c48d186fa3976f000c50
[INFO] running `Command { std: "docker" "start" "219708894fb6a36f16b72f6fec84255d2b9f19145a74c48d186fa3976f000c50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "219708894fb6a36f16b72f6fec84255d2b9f19145a74c48d186fa3976f000c50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "219708894fb6a36f16b72f6fec84255d2b9f19145a74c48d186fa3976f000c50" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "219708894fb6a36f16b72f6fec84255d2b9f19145a74c48d186fa3976f000c50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "219708894fb6a36f16b72f6fec84255d2b9f19145a74c48d186fa3976f000c50" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling tg-rcore-tutorial-syscall v0.4.8
[INFO] [stderr]    Compiling numeric-enum-macro v0.2.0
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling wpj-tg-rcore-tutorial-user v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling customizable-buddy v0.0.2
[INFO] [stderr]    Compiling tg-rcore-tutorial-signal-defs v0.4.8
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling tg-rcore-tutorial-console v0.4.8
[INFO] [stdout] warning[E0133]: use of mutable static is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/test_condvar.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     A = 1;
[INFO] [stdout]    |     ^ use of mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stdout] note: an unsafe function restricts its caller, but its body is safe by default
[INFO] [stdout]   --> src/bin/test_condvar.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | unsafe fn first() -> isize {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout]    = note: `#[warn(unsafe_op_in_unsafe_fn)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:28:14
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let id = *arg;
[INFO] [stdout]    |              ^^^^ dereference of raw pointer
[INFO] [stdout]    |
[INFO] [stdout]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stdout] note: an unsafe function restricts its caller, but its body is safe by default
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | unsafe fn read_worker(arg: *const usize) -> isize {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout]    = note: `#[warn(unsafe_op_in_unsafe_fn)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: call to unsafe function `core::ptr::const_ptr::<impl *const T>::read_volatile` is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/test_condvar.rs:37:11
[INFO] [stdout]    |
[INFO] [stdout] 37 |     while (&raw const A).read_volatile() == 0 {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function
[INFO] [stdout]    |
[INFO] [stdout]    = note: consult the function's documentation for information on how to avoid undefined behavior
[INFO] [stdout] note: an unsafe function restricts its caller, but its body is safe by default
[INFO] [stdout]   --> src/bin/test_condvar.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | unsafe fn second() -> isize {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: call to unsafe function `core::ptr::const_ptr::<impl *const T>::read_volatile` is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/test_condvar.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let a = (&raw const A).read_volatile();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function
[INFO] [stdout]    |
[INFO] [stdout]    = note: consult the function's documentation for information on how to avoid undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let lock = &*LOCK_PTR;
[INFO] [stdout]    |                 ^^^^^^^^^ dereference of raw pointer
[INFO] [stdout]    |
[INFO] [stdout]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: call to unsafe function `core::ptr::const_ptr::<impl *const T>::read_volatile` is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/test_condvar.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let a = (&raw const A).read_volatile();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function
[INFO] [stdout]    |
[INFO] [stdout]    = note: consult the function's documentation for information on how to avoid undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: use of mutable static is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:29:18
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let lock = &*LOCK_PTR;
[INFO] [stdout]    |                  ^^^^^^^^ use of mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[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/build/wpj-tg-rcore-tutorial-user/4e57a04304681f69/out/rustcex6UNP/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-syscall/a312b61c45333cc6/out/libtg_rcore_tutorial_syscall-a312b61c45333cc6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-signal-defs/f8c08904ce016b39/out/libtg_rcore_tutorial_signal_defs-f8c08904ce016b39.rlib" "/opt/rustwide/target/debug/build/numeric-enum-macro/5a2d6389bc9f3264/out/libnumeric_enum_macro-5a2d6389bc9f3264.rlib" "/opt/rustwide/target/debug/build/bitflags/e7a388805a9595d6/out/libbitflags-e7a388805a9595d6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-console/7ba35e3bc4a5166b/out/libtg_rcore_tutorial_console-7ba35e3bc4a5166b.rlib" "/opt/rustwide/target/debug/build/spin/ffa5bdde61f6eedb/out/libspin-ffa5bdde61f6eedb.rlib" "/opt/rustwide/target/debug/build/lock_api/d40fa7bfa408ebd6/out/liblock_api-d40fa7bfa408ebd6.rlib" "/opt/rustwide/target/debug/build/scopeguard/6486b5fad18b9633/out/libscopeguard-6486b5fad18b9633.rlib" "/opt/rustwide/target/debug/build/log/632f1d3c10a2e300/out/liblog-632f1d3c10a2e300.rlib" "/opt/rustwide/target/debug/build/customizable-buddy/f93ad79ec92eeb68/out/libcustomizable_buddy-f93ad79ec92eeb68.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-L" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/4e57a04304681f69/out/rustcex6UNP/raw-dylibs" "-Wl,-Bdynamic" "-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/build/wpj-tg-rcore-tutorial-user/4e57a04304681f69/out/fork_exit" "-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: duplicate symbol: _start
[INFO] [stdout]           >>> defined at /usr/lib/gcc/x86_64-linux-gnu/15/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           >>> defined at lib.rs:21 (src/lib.rs:21)
[INFO] [stdout]           >>>            user_lib-bea59f73c3820a0f.user_lib.8732e5fef163cb0a-cgu.0.rcgu.o:(.text.entry+0x0) in archive /opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wpj-tg-rcore-tutorial-user` (bin "fork_exit") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning[E0133]: call to unsafe function `core::ptr::const_ptr::<impl *const T>::read_volatile` is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:37:21
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let value = (&raw const VALUE).read_volatile();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function
[INFO] [stdout]    |
[INFO] [stdout]    = note: consult the function's documentation for information on how to avoid undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:51:14
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let id = *arg;
[INFO] [stdout]    |              ^^^^ dereference of raw pointer
[INFO] [stdout]    |
[INFO] [stdout]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stdout] note: an unsafe function restricts its caller, but its body is safe by default
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:50:1
[INFO] [stdout]    |
[INFO] [stdout] 50 | unsafe fn write_worker(arg: *const usize) -> isize {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let lock = &*LOCK_PTR;
[INFO] [stdout]    |                 ^^^^^^^^^ dereference of raw pointer
[INFO] [stdout]    |
[INFO] [stdout]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: use of mutable static is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:52:18
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let lock = &*LOCK_PTR;
[INFO] [stdout]    |                  ^^^^^^^^ use of mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: call to unsafe function `core::ptr::const_ptr::<impl *const T>::read_volatile` is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:61:21
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let value = (&raw const VALUE).read_volatile();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function
[INFO] [stdout]    |
[INFO] [stdout]    = note: consult the function's documentation for information on how to avoid undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: call to unsafe function `core::ptr::mut_ptr::<impl *mut T>::write_volatile` is unsafe and requires unsafe block
[INFO] [stdout]   --> src/bin/t2l5_rwlock_fair.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |         (&raw mut VALUE).write_volatile(value + 1);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function
[INFO] [stdout]    |
[INFO] [stdout]    = note: consult the function's documentation for information on how to avoid undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wpj-tg-rcore-tutorial-user` (bin "ch4_mmap1") due to 1 previous error
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/e499f23dc00eba90/out/rustc3HFdH2/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-syscall/a312b61c45333cc6/out/libtg_rcore_tutorial_syscall-a312b61c45333cc6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-signal-defs/f8c08904ce016b39/out/libtg_rcore_tutorial_signal_defs-f8c08904ce016b39.rlib" "/opt/rustwide/target/debug/build/numeric-enum-macro/5a2d6389bc9f3264/out/libnumeric_enum_macro-5a2d6389bc9f3264.rlib" "/opt/rustwide/target/debug/build/bitflags/e7a388805a9595d6/out/libbitflags-e7a388805a9595d6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-console/7ba35e3bc4a5166b/out/libtg_rcore_tutorial_console-7ba35e3bc4a5166b.rlib" "/opt/rustwide/target/debug/build/spin/ffa5bdde61f6eedb/out/libspin-ffa5bdde61f6eedb.rlib" "/opt/rustwide/target/debug/build/lock_api/d40fa7bfa408ebd6/out/liblock_api-d40fa7bfa408ebd6.rlib" "/opt/rustwide/target/debug/build/scopeguard/6486b5fad18b9633/out/libscopeguard-6486b5fad18b9633.rlib" "/opt/rustwide/target/debug/build/log/632f1d3c10a2e300/out/liblog-632f1d3c10a2e300.rlib" "/opt/rustwide/target/debug/build/customizable-buddy/f93ad79ec92eeb68/out/libcustomizable_buddy-f93ad79ec92eeb68.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-L" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/e499f23dc00eba90/out/rustc3HFdH2/raw-dylibs" "-Wl,-Bdynamic" "-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/build/wpj-tg-rcore-tutorial-user/e499f23dc00eba90/out/ch4_mmap1" "-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: duplicate symbol: _start
[INFO] [stdout]           >>> defined at /usr/lib/gcc/x86_64-linux-gnu/15/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           >>> defined at lib.rs:21 (src/lib.rs:21)
[INFO] [stdout]           >>>            user_lib-bea59f73c3820a0f.user_lib.8732e5fef163cb0a-cgu.0.rcgu.o:(.text.entry+0x0) in archive /opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[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/build/wpj-tg-rcore-tutorial-user/8b5cd9e2a1b0363f/out/rustcNHzwdP/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-syscall/a312b61c45333cc6/out/libtg_rcore_tutorial_syscall-a312b61c45333cc6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-signal-defs/f8c08904ce016b39/out/libtg_rcore_tutorial_signal_defs-f8c08904ce016b39.rlib" "/opt/rustwide/target/debug/build/numeric-enum-macro/5a2d6389bc9f3264/out/libnumeric_enum_macro-5a2d6389bc9f3264.rlib" "/opt/rustwide/target/debug/build/bitflags/e7a388805a9595d6/out/libbitflags-e7a388805a9595d6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-console/7ba35e3bc4a5166b/out/libtg_rcore_tutorial_console-7ba35e3bc4a5166b.rlib" "/opt/rustwide/target/debug/build/spin/ffa5bdde61f6eedb/out/libspin-ffa5bdde61f6eedb.rlib" "/opt/rustwide/target/debug/build/lock_api/d40fa7bfa408ebd6/out/liblock_api-d40fa7bfa408ebd6.rlib" "/opt/rustwide/target/debug/build/scopeguard/6486b5fad18b9633/out/libscopeguard-6486b5fad18b9633.rlib" "/opt/rustwide/target/debug/build/log/632f1d3c10a2e300/out/liblog-632f1d3c10a2e300.rlib" "/opt/rustwide/target/debug/build/customizable-buddy/f93ad79ec92eeb68/out/libcustomizable_buddy-f93ad79ec92eeb68.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-L" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/8b5cd9e2a1b0363f/out/rustcNHzwdP/raw-dylibs" "-Wl,-Bdynamic" "-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/build/wpj-tg-rcore-tutorial-user/8b5cd9e2a1b0363f/out/13forktree" "-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: duplicate symbol: _start
[INFO] [stdout]           >>> defined at /usr/lib/gcc/x86_64-linux-gnu/15/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           >>> defined at lib.rs:21 (src/lib.rs:21)
[INFO] [stdout]           >>>            user_lib-bea59f73c3820a0f.user_lib.8732e5fef163cb0a-cgu.0.rcgu.o:(.text.entry+0x0) in archive /opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[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/build/wpj-tg-rcore-tutorial-user/62909e6756763278/out/rustcbJ6oNp/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-syscall/a312b61c45333cc6/out/libtg_rcore_tutorial_syscall-a312b61c45333cc6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-signal-defs/f8c08904ce016b39/out/libtg_rcore_tutorial_signal_defs-f8c08904ce016b39.rlib" "/opt/rustwide/target/debug/build/numeric-enum-macro/5a2d6389bc9f3264/out/libnumeric_enum_macro-5a2d6389bc9f3264.rlib" "/opt/rustwide/target/debug/build/bitflags/e7a388805a9595d6/out/libbitflags-e7a388805a9595d6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-console/7ba35e3bc4a5166b/out/libtg_rcore_tutorial_console-7ba35e3bc4a5166b.rlib" "/opt/rustwide/target/debug/build/spin/ffa5bdde61f6eedb/out/libspin-ffa5bdde61f6eedb.rlib" "/opt/rustwide/target/debug/build/lock_api/d40fa7bfa408ebd6/out/liblock_api-d40fa7bfa408ebd6.rlib" "/opt/rustwide/target/debug/build/scopeguard/6486b5fad18b9633/out/libscopeguard-6486b5fad18b9633.rlib" "/opt/rustwide/target/debug/build/log/632f1d3c10a2e300/out/liblog-632f1d3c10a2e300.rlib" "/opt/rustwide/target/debug/build/customizable-buddy/f93ad79ec92eeb68/out/libcustomizable_buddy-f93ad79ec92eeb68.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-L" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/62909e6756763278/out/rustcbJ6oNp/raw-dylibs" "-Wl,-Bdynamic" "-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/build/wpj-tg-rcore-tutorial-user/62909e6756763278/out/pipe_large_test" "-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: duplicate symbol: _start
[INFO] [stdout]           >>> defined at /usr/lib/gcc/x86_64-linux-gnu/15/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           >>> defined at lib.rs:21 (src/lib.rs:21)
[INFO] [stdout]           >>>            user_lib-bea59f73c3820a0f.user_lib.8732e5fef163cb0a-cgu.0.rcgu.o:(.text.entry+0x0) in archive /opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wpj-tg-rcore-tutorial-user` (bin "13forktree") due to 1 previous error
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/529c76d8d11b38bf/out/rustcS09XGm/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-syscall/a312b61c45333cc6/out/libtg_rcore_tutorial_syscall-a312b61c45333cc6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-signal-defs/f8c08904ce016b39/out/libtg_rcore_tutorial_signal_defs-f8c08904ce016b39.rlib" "/opt/rustwide/target/debug/build/numeric-enum-macro/5a2d6389bc9f3264/out/libnumeric_enum_macro-5a2d6389bc9f3264.rlib" "/opt/rustwide/target/debug/build/bitflags/e7a388805a9595d6/out/libbitflags-e7a388805a9595d6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-console/7ba35e3bc4a5166b/out/libtg_rcore_tutorial_console-7ba35e3bc4a5166b.rlib" "/opt/rustwide/target/debug/build/spin/ffa5bdde61f6eedb/out/libspin-ffa5bdde61f6eedb.rlib" "/opt/rustwide/target/debug/build/lock_api/d40fa7bfa408ebd6/out/liblock_api-d40fa7bfa408ebd6.rlib" "/opt/rustwide/target/debug/build/scopeguard/6486b5fad18b9633/out/libscopeguard-6486b5fad18b9633.rlib" "/opt/rustwide/target/debug/build/log/632f1d3c10a2e300/out/liblog-632f1d3c10a2e300.rlib" "/opt/rustwide/target/debug/build/customizable-buddy/f93ad79ec92eeb68/out/libcustomizable_buddy-f93ad79ec92eeb68.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-L" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/529c76d8d11b38bf/out/rustcS09XGm/raw-dylibs" "-Wl,-Bdynamic" "-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/build/wpj-tg-rcore-tutorial-user/529c76d8d11b38bf/out/test_condvar" "-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: duplicate symbol: _start
[INFO] [stdout]           >>> defined at /usr/lib/gcc/x86_64-linux-gnu/15/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           >>> defined at lib.rs:21 (src/lib.rs:21)
[INFO] [stdout]           >>>            user_lib-bea59f73c3820a0f.user_lib.8732e5fef163cb0a-cgu.0.rcgu.o:(.text.entry+0x0) in archive /opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[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/build/wpj-tg-rcore-tutorial-user/748a44099ada3a5a/out/rustcrLpb6l/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-syscall/a312b61c45333cc6/out/libtg_rcore_tutorial_syscall-a312b61c45333cc6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-signal-defs/f8c08904ce016b39/out/libtg_rcore_tutorial_signal_defs-f8c08904ce016b39.rlib" "/opt/rustwide/target/debug/build/numeric-enum-macro/5a2d6389bc9f3264/out/libnumeric_enum_macro-5a2d6389bc9f3264.rlib" "/opt/rustwide/target/debug/build/bitflags/e7a388805a9595d6/out/libbitflags-e7a388805a9595d6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-console/7ba35e3bc4a5166b/out/libtg_rcore_tutorial_console-7ba35e3bc4a5166b.rlib" "/opt/rustwide/target/debug/build/spin/ffa5bdde61f6eedb/out/libspin-ffa5bdde61f6eedb.rlib" "/opt/rustwide/target/debug/build/lock_api/d40fa7bfa408ebd6/out/liblock_api-d40fa7bfa408ebd6.rlib" "/opt/rustwide/target/debug/build/scopeguard/6486b5fad18b9633/out/libscopeguard-6486b5fad18b9633.rlib" "/opt/rustwide/target/debug/build/log/632f1d3c10a2e300/out/liblog-632f1d3c10a2e300.rlib" "/opt/rustwide/target/debug/build/customizable-buddy/f93ad79ec92eeb68/out/libcustomizable_buddy-f93ad79ec92eeb68.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-L" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/748a44099ada3a5a/out/rustcrLpb6l/raw-dylibs" "-Wl,-Bdynamic" "-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/build/wpj-tg-rcore-tutorial-user/748a44099ada3a5a/out/ch3_sleep" "-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: duplicate symbol: _start
[INFO] [stdout]           >>> defined at /usr/lib/gcc/x86_64-linux-gnu/15/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           >>> defined at lib.rs:21 (src/lib.rs:21)
[INFO] [stdout]           >>>            user_lib-bea59f73c3820a0f.user_lib.8732e5fef163cb0a-cgu.0.rcgu.o:(.text.entry+0x0) in archive /opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wpj-tg-rcore-tutorial-user` (bin "ch3_sleep") due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0133`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wpj-tg-rcore-tutorial-user` (bin "test_condvar") due to 1 previous error; 4 warnings emitted
[INFO] [stderr] error: could not compile `wpj-tg-rcore-tutorial-user` (bin "pipe_large_test") due to 1 previous error
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/adfc2b06f1685e0c/out/rustcrqo65e/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-syscall/a312b61c45333cc6/out/libtg_rcore_tutorial_syscall-a312b61c45333cc6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-signal-defs/f8c08904ce016b39/out/libtg_rcore_tutorial_signal_defs-f8c08904ce016b39.rlib" "/opt/rustwide/target/debug/build/numeric-enum-macro/5a2d6389bc9f3264/out/libnumeric_enum_macro-5a2d6389bc9f3264.rlib" "/opt/rustwide/target/debug/build/bitflags/e7a388805a9595d6/out/libbitflags-e7a388805a9595d6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-console/7ba35e3bc4a5166b/out/libtg_rcore_tutorial_console-7ba35e3bc4a5166b.rlib" "/opt/rustwide/target/debug/build/spin/ffa5bdde61f6eedb/out/libspin-ffa5bdde61f6eedb.rlib" "/opt/rustwide/target/debug/build/lock_api/d40fa7bfa408ebd6/out/liblock_api-d40fa7bfa408ebd6.rlib" "/opt/rustwide/target/debug/build/scopeguard/6486b5fad18b9633/out/libscopeguard-6486b5fad18b9633.rlib" "/opt/rustwide/target/debug/build/log/632f1d3c10a2e300/out/liblog-632f1d3c10a2e300.rlib" "/opt/rustwide/target/debug/build/customizable-buddy/f93ad79ec92eeb68/out/libcustomizable_buddy-f93ad79ec92eeb68.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-L" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/adfc2b06f1685e0c/out/rustcrqo65e/raw-dylibs" "-Wl,-Bdynamic" "-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/build/wpj-tg-rcore-tutorial-user/adfc2b06f1685e0c/out/ch5_stride4" "-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: duplicate symbol: _start
[INFO] [stdout]           >>> defined at /usr/lib/gcc/x86_64-linux-gnu/15/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           >>> defined at lib.rs:21 (src/lib.rs:21)
[INFO] [stdout]           >>>            user_lib-bea59f73c3820a0f.user_lib.8732e5fef163cb0a-cgu.0.rcgu.o:(.text.entry+0x0) in archive /opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wpj-tg-rcore-tutorial-user` (bin "ch5_stride4") due to 1 previous error
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/4b9a312259f5c99b/out/rustcyY09VI/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-syscall/a312b61c45333cc6/out/libtg_rcore_tutorial_syscall-a312b61c45333cc6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-signal-defs/f8c08904ce016b39/out/libtg_rcore_tutorial_signal_defs-f8c08904ce016b39.rlib" "/opt/rustwide/target/debug/build/numeric-enum-macro/5a2d6389bc9f3264/out/libnumeric_enum_macro-5a2d6389bc9f3264.rlib" "/opt/rustwide/target/debug/build/bitflags/e7a388805a9595d6/out/libbitflags-e7a388805a9595d6.rlib" "/opt/rustwide/target/debug/build/tg-rcore-tutorial-console/7ba35e3bc4a5166b/out/libtg_rcore_tutorial_console-7ba35e3bc4a5166b.rlib" "/opt/rustwide/target/debug/build/spin/ffa5bdde61f6eedb/out/libspin-ffa5bdde61f6eedb.rlib" "/opt/rustwide/target/debug/build/lock_api/d40fa7bfa408ebd6/out/liblock_api-d40fa7bfa408ebd6.rlib" "/opt/rustwide/target/debug/build/scopeguard/6486b5fad18b9633/out/libscopeguard-6486b5fad18b9633.rlib" "/opt/rustwide/target/debug/build/log/632f1d3c10a2e300/out/liblog-632f1d3c10a2e300.rlib" "/opt/rustwide/target/debug/build/customizable-buddy/f93ad79ec92eeb68/out/libcustomizable_buddy-f93ad79ec92eeb68.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-L" "/opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/4b9a312259f5c99b/out/rustcyY09VI/raw-dylibs" "-Wl,-Bdynamic" "-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/build/wpj-tg-rcore-tutorial-user/4b9a312259f5c99b/out/t2l5_rwlock_fair" "-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: duplicate symbol: _start
[INFO] [stdout]           >>> defined at /usr/lib/gcc/x86_64-linux-gnu/15/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           >>> defined at lib.rs:21 (src/lib.rs:21)
[INFO] [stdout]           >>>            user_lib-bea59f73c3820a0f.user_lib.8732e5fef163cb0a-cgu.0.rcgu.o:(.text.entry+0x0) in archive /opt/rustwide/target/debug/build/wpj-tg-rcore-tutorial-user/bea59f73c3820a0f/out/libuser_lib-bea59f73c3820a0f.rlib
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0133`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wpj-tg-rcore-tutorial-user` (bin "t2l5_rwlock_fair") due to 1 previous error; 9 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "219708894fb6a36f16b72f6fec84255d2b9f19145a74c48d186fa3976f000c50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "219708894fb6a36f16b72f6fec84255d2b9f19145a74c48d186fa3976f000c50", kill_on_drop: false }`
[INFO] [stdout] 219708894fb6a36f16b72f6fec84255d2b9f19145a74c48d186fa3976f000c50
