[INFO] fetching crate eater-arc-illegal 0.1.0... [INFO] testing eater-arc-illegal-0.1.0 against beta-2025-09-21 for beta-1.91-3 [INFO] extracting crate eater-arc-illegal 0.1.0 into /workspace/builds/worker-3-tc2/source [INFO] started tweaking crates.io crate eater-arc-illegal 0.1.0 [INFO] finished tweaking crates.io crate eater-arc-illegal 0.1.0 [INFO] tweaked toml for crates.io crate eater-arc-illegal 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate eater-arc-illegal 0.1.0 on toolchain beta-2025-09-21 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate eater-arc-illegal 0.1.0 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 063a4ad9783ca01b5f8daeb0f33a97a289de848084a8bf678e29516058c12bd6 [INFO] running `Command { std: "docker" "start" "-a" "063a4ad9783ca01b5f8daeb0f33a97a289de848084a8bf678e29516058c12bd6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "063a4ad9783ca01b5f8daeb0f33a97a289de848084a8bf678e29516058c12bd6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "063a4ad9783ca01b5f8daeb0f33a97a289de848084a8bf678e29516058c12bd6", kill_on_drop: false }` [INFO] [stdout] 063a4ad9783ca01b5f8daeb0f33a97a289de848084a8bf678e29516058c12bd6 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b211516c9aced0aedf918d3b4574c3d387f94304a858c03a7c0c4ed5c98bbdcd [INFO] running `Command { std: "docker" "start" "-a" "b211516c9aced0aedf918d3b4574c3d387f94304a858c03a7c0c4ed5c98bbdcd", kill_on_drop: false }` [INFO] [stderr] Compiling eater-arc-illegal v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s [INFO] running `Command { std: "docker" "inspect" "b211516c9aced0aedf918d3b4574c3d387f94304a858c03a7c0c4ed5c98bbdcd", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b211516c9aced0aedf918d3b4574c3d387f94304a858c03a7c0c4ed5c98bbdcd", kill_on_drop: false }` [INFO] [stdout] b211516c9aced0aedf918d3b4574c3d387f94304a858c03a7c0c4ed5c98bbdcd [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 70895f24a54bfeef522a516d7e811ecae32c85695b929195be63a8a66307916a [INFO] running `Command { std: "docker" "start" "-a" "70895f24a54bfeef522a516d7e811ecae32c85695b929195be63a8a66307916a", kill_on_drop: false }` [INFO] [stderr] Compiling eater-arc-illegal v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.63s [INFO] running `Command { std: "docker" "inspect" "70895f24a54bfeef522a516d7e811ecae32c85695b929195be63a8a66307916a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "70895f24a54bfeef522a516d7e811ecae32c85695b929195be63a8a66307916a", kill_on_drop: false }` [INFO] [stdout] 70895f24a54bfeef522a516d7e811ecae32c85695b929195be63a8a66307916a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] d477bd8908a33ec40761aeaf2caf264c52f2c5e6c0fc3517fe0b8102549686b0 [INFO] running `Command { std: "docker" "start" "-a" "d477bd8908a33ec40761aeaf2caf264c52f2c5e6c0fc3517fe0b8102549686b0", kill_on_drop: false }` [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stdout] [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/eater_arc_illegal-6e9944f1c530ea12) [INFO] [stdout] running 3 tests [INFO] [stderr] [INFO] [stderr] thread 'tests::dismantle_weak_works' (25) panicked at src/lib.rs:234:27: [INFO] [stderr] null pointer dereference occurred [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x5ef1942d4d62 - std::backtrace_rs::backtrace::libunwind::trace::hcab59e1e990fdc24 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stderr] 1: 0x5ef1942d4d62 - std::backtrace_rs::backtrace::trace_unsynchronized::he24cc57f3d2f47b7 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stderr] 2: 0x5ef1942d4d62 - std::sys::backtrace::_print_fmt::hf8d65ede198eeb54 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:66:9 [INFO] [stderr] 3: 0x5ef1942d4d62 - ::fmt::h67edf0e4d33c343c [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:39:26 [INFO] [stderr] 4: 0x5ef1942e4e9f - core::fmt::rt::Argument::fmt::hef94184842aeafdd [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/rt.rs:173:76 [INFO] [stderr] 5: 0x5ef1942e4e9f - core::fmt::write::hcf0c66b48a8fa606 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/mod.rs:1468:25 [INFO] [stderr] 6: 0x5ef1942a1f21 - std::io::default_write_fmt::h1ecb8c7cfa7da481 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:639:11 [INFO] [stderr] 7: 0x5ef1942a1f21 - std::io::Write::write_fmt::h051fe4a9e4fdbf48 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:1954:13 [INFO] [stderr] 8: 0x5ef1942ae222 - std::sys::backtrace::BacktraceLock::print::h07e5435aa717b414 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:42:9 [INFO] [stderr] 9: 0x5ef1942b2dcf - std::panicking::default_hook::{{closure}}::h91001850288db5f7 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:301:27 [INFO] [stderr] 10: 0x5ef1942b2c29 - std::panicking::default_hook::h2346dbb704ef5512 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:328:9 [INFO] [stderr] 11: 0x5ef1942737ce - as core::ops::function::Fn>::call::h18383b2e29377420 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/alloc/src/boxed.rs:1999:9 [INFO] [stderr] 12: 0x5ef1942737ce - test::test_main_with_exit_callback::{{closure}}::h272d7ef99aef06dc [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:145:21 [INFO] [stderr] 13: 0x5ef1942b348f - as core::ops::function::Fn>::call::h6dba6e441651a0d1 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/alloc/src/boxed.rs:1999:9 [INFO] [stderr] 14: 0x5ef1942b348f - std::panicking::panic_with_hook::hd2b063a6090d23a4 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:842:13 [INFO] [stderr] 15: 0x5ef1942b32b6 - std::panicking::panic_handler::{{closure}}::he666d95f139a333e [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:700:13 [INFO] [stderr] 16: 0x5ef1942ae359 - std::sys::backtrace::__rust_end_short_backtrace::h631ad224854ebee5 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:174:18 [INFO] [stderr] 17: 0x5ef19429669d - __rustc[1d67440d6e82e4f]::rust_begin_unwind [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:698:5 [INFO] [stderr] 18: 0x5ef1942ec4ed - core::panicking::panic_nounwind_fmt::runtime::hf619e8fd73995337 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panicking.rs:117:22 [INFO] [stderr] 19: 0x5ef1942ec4ed - core::panicking::panic_nounwind_fmt::hc177e1bd7a48be0d [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/intrinsics/mod.rs:2435:9 [INFO] [stderr] 20: 0x5ef1942ec6cd - core::panicking::panic_null_pointer_dereference::h0eafed6fbb56ab06 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panicking.rs:302:5 [INFO] [stderr] 21: 0x5ef19424e343 - eater_arc_illegal::WeakIllegal::get::h6c098af98230d5f1 [INFO] [stderr] at /opt/rustwide/workdir/src/lib.rs:234:27 [INFO] [stderr] 22: 0x5ef19424f49c - eater_arc_illegal::tests::dismantle_weak_works::h56e16d2879cc59d3 [INFO] [stderr] at /opt/rustwide/workdir/src/lib.rs:381:31 [INFO] [stderr] 23: 0x5ef19424f5d7 - eater_arc_illegal::tests::dismantle_weak_works::{{closure}}::haf63609bf152a8cd [INFO] [stderr] at /opt/rustwide/workdir/src/lib.rs:361:34 [INFO] [stderr] 24: 0x5ef19424f896 - core::ops::function::FnOnce::call_once::h431975a1be8dcbdc [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5 [INFO] [stderr] 25: 0x5ef19427358b - core::ops::function::FnOnce::call_once::h70887edf07a630ba [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5 [INFO] [stderr] 26: 0x5ef19427358b - test::__rust_begin_short_backtrace::h27763c4cbbdb8601 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:663:18 [INFO] [stderr] 27: 0x5ef1942891f5 - test::run_test_in_process::{{closure}}::h4dc8bc6d5e3924d3 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:686:74 [INFO] [stderr] 28: 0x5ef1942891f5 - as core::ops::function::FnOnce<()>>::call_once::h75905e8ffe81974f [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stderr] 29: 0x5ef1942891f5 - std::panicking::catch_unwind::do_call::h0bc60366ba66eba5 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40 [INFO] [stderr] 30: 0x5ef1942891f5 - std::panicking::catch_unwind::hae1ec7bf94407afa [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19 [INFO] [stderr] 31: 0x5ef1942891f5 - std::panic::catch_unwind::h0f4ff4773d84d3cd [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14 [INFO] [stderr] 32: 0x5ef1942891f5 - test::run_test_in_process::h03fbc77ae48b3f10 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:686:27 [INFO] [stderr] 33: 0x5ef1942891f5 - test::run_test::{{closure}}::h83476a9c453dc4d3 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:607:43 [INFO] [stderr] 34: 0x5ef19425f9e4 - test::run_test::{{closure}}::h515482ad1e7fe7de [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:637:41 [INFO] [stderr] 35: 0x5ef19425f9e4 - std::sys::backtrace::__rust_begin_short_backtrace::hed09f6ac5fe9d647 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:158:18 [INFO] [stderr] 36: 0x5ef1942632aa - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h988e2cd969319888 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/thread/mod.rs:559:17 [INFO] [stderr] 37: 0x5ef1942632aa - as core::ops::function::FnOnce<()>>::call_once::hd70e28dc46ec20be [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stderr] 38: 0x5ef1942632aa - std::panicking::catch_unwind::do_call::hdc29e11311eb7655 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40 [INFO] [stderr] 39: 0x5ef1942632aa - std::panicking::catch_unwind::h9e402d6a96fef41c [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19 [INFO] [stderr] 40: 0x5ef1942632aa - std::panic::catch_unwind::h9213c0c54aec70e0 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14 [INFO] [stderr] 41: 0x5ef1942632aa - std::thread::Builder::spawn_unchecked_::{{closure}}::h6262965869ed2b87 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/thread/mod.rs:557:30 [INFO] [stderr] 42: 0x5ef1942632aa - core::ops::function::FnOnce::call_once{{vtable.shim}}::h05c05ed02619e462 [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5 [INFO] [stderr] 43: 0x5ef1942a94bf - as core::ops::function::FnOnce>::call_once::h2044e71c41d3958a [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/alloc/src/boxed.rs:1985:9 [INFO] [stderr] 44: 0x5ef1942a94bf - std::sys::thread::unix::Thread::new::thread_start::hf277835320aa8e5a [INFO] [stderr] at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/thread/unix.rs:126:17 [INFO] [stderr] 45: 0x7676347c9aa4 - [INFO] [stderr] 46: 0x767634856a34 - clone [INFO] [stderr] 47: 0x0 - [INFO] [stderr] thread caused non-unwinding panic. aborting. [INFO] [stderr] error: test failed, to rerun pass `--lib` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/deps/eater_arc_illegal-6e9944f1c530ea12` (signal: 6, SIGABRT: process abort signal) [INFO] running `Command { std: "docker" "inspect" "d477bd8908a33ec40761aeaf2caf264c52f2c5e6c0fc3517fe0b8102549686b0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d477bd8908a33ec40761aeaf2caf264c52f2c5e6c0fc3517fe0b8102549686b0", kill_on_drop: false }` [INFO] [stdout] d477bd8908a33ec40761aeaf2caf264c52f2c5e6c0fc3517fe0b8102549686b0