[INFO] cloning repository https://github.com/davidarmstronglewis/discovery [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davidarmstronglewis/discovery" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidarmstronglewis%2Fdiscovery", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidarmstronglewis%2Fdiscovery'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] be0f3558ae8c7e58d93c6e5c416ef40ed8444137 [INFO] testing davidarmstronglewis/discovery against beta-2022-04-10 for beta-1.61-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidarmstronglewis%2Fdiscovery" "/workspace/builds/worker-2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/davidarmstronglewis/discovery on toolchain beta-2022-04-10 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] removed /workspace/builds/worker-2/source/.cargo/config.toml [INFO] started tweaking git repo https://github.com/davidarmstronglewis/discovery [INFO] finished tweaking git repo https://github.com/davidarmstronglewis/discovery [INFO] tweaked toml for git repo https://github.com/davidarmstronglewis/discovery written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/davidarmstronglewis/discovery already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 6f4cbaf1811c24a4dd9046ca2437134d81a1230e976a22a7a90b31447d8a6b65 [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" "6f4cbaf1811c24a4dd9046ca2437134d81a1230e976a22a7a90b31447d8a6b65", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6f4cbaf1811c24a4dd9046ca2437134d81a1230e976a22a7a90b31447d8a6b65", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6f4cbaf1811c24a4dd9046ca2437134d81a1230e976a22a7a90b31447d8a6b65", kill_on_drop: false }` [INFO] [stdout] 6f4cbaf1811c24a4dd9046ca2437134d81a1230e976a22a7a90b31447d8a6b65 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ecab6d2b9e5c9e0692d1ec3ca259ab84c9fd9630a1c70b1548b4afbe8c084e3d [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" "ecab6d2b9e5c9e0692d1ec3ca259ab84c9fd9630a1c70b1548b4afbe8c084e3d", kill_on_drop: false }` [INFO] [stderr] Compiling syn v1.0.78 [INFO] [stderr] Compiling cortex-m v0.7.3 [INFO] [stderr] Compiling nb v1.0.0 [INFO] [stderr] Compiling cortex-m-rt v0.6.15 [INFO] [stderr] Compiling serde_json v1.0.68 [INFO] [stderr] Compiling camino v1.0.5 [INFO] [stderr] Compiling vcell v0.1.3 [INFO] [stderr] Compiling bitfield v0.13.2 [INFO] [stderr] Compiling r0 v0.2.2 [INFO] [stderr] Compiling stm32f3 v0.13.2 [INFO] [stderr] Compiling slice-group-by v0.2.6 [INFO] [stderr] Compiling stable_deref_trait v1.2.0 [INFO] [stderr] Compiling stm32f3-discovery v0.7.2 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling num-integer v0.1.44 [INFO] [stderr] Compiling num-iter v0.1.42 [INFO] [stderr] Compiling embedded-dma v0.1.2 [INFO] [stderr] Compiling semver-parser v0.10.2 [INFO] [stderr] Compiling volatile-register v0.2.1 [INFO] [stderr] Compiling nb v0.1.3 [INFO] [stderr] Compiling quote v1.0.10 [INFO] [stderr] Compiling generic-array v0.11.2 [INFO] [stderr] Compiling embedded-hal v0.2.6 [INFO] [stderr] Compiling cast v0.2.7 [INFO] [stderr] Compiling micromath v1.1.1 [INFO] [stderr] Compiling switch-hal v0.4.0 [INFO] [stderr] Compiling accelerometer v0.12.0 [INFO] [stderr] Compiling panic-itm v0.4.2 [INFO] [stderr] Compiling lsm303dlhc v0.2.0 [INFO] [stderr] Compiling num-complex v0.3.1 [INFO] [stderr] Compiling num-rational v0.3.2 [INFO] [stderr] Compiling chrono v0.4.19 [INFO] [stderr] Compiling num v0.3.1 [INFO] [stderr] Compiling embedded-time v0.12.1 [INFO] [stderr] Compiling rtcc v0.2.1 [INFO] [stderr] Compiling serde_derive v1.0.130 [INFO] [stderr] Compiling cortex-m-rt-macros v0.6.15 [INFO] [stderr] Compiling serde v1.0.130 [INFO] [stderr] Compiling cargo-platform v0.1.2 [INFO] [stderr] Compiling semver v0.11.0 [INFO] [stderr] Compiling cargo_metadata v0.13.1 [INFO] [stderr] Compiling stm32f3xx-hal v0.7.0 [INFO] [stderr] error: failed to run custom build command for `stm32f3xx-hal v0.7.0` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/stm32f3xx-hal-a8e2e4cd96826c95/build-script-build` (exit status: 101) [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: CargoMetadata { stderr: " Downloading crates ...\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nwarning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)\nerror: failed to download from `https://crates.io/api/v1/crates/as-slice/0.1.5/download`\n\nCaused by:\n [6] Couldn't resolve host name (Could not resolve host: crates.io)\n" }', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/stm32f3xx-hal-0.7.0/build.rs:40:50 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x5599062457ad - std::backtrace_rs::backtrace::libunwind::trace::ha359b7f0090e2792 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5 [INFO] [stderr] 1: 0x5599062457ad - std::backtrace_rs::backtrace::trace_unsynchronized::h0584631f25c1d70e [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stderr] 2: 0x5599062457ad - std::sys_common::backtrace::_print_fmt::hdadffd97d279ff14 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:66:5 [INFO] [stderr] 3: 0x5599062457ad - ::fmt::h26f189e611080a74 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:45:22 [INFO] [stderr] 4: 0x55990626729c - core::fmt::write::hfb5d11dfe037e8b7 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/fmt/mod.rs:1194:17 [INFO] [stderr] 5: 0x559906242d41 - std::io::Write::write_fmt::ha30651f608022a46 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/io/mod.rs:1655:15 [INFO] [stderr] 6: 0x559906246f55 - std::sys_common::backtrace::_print::h7a0e44402913ba60 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:48:5 [INFO] [stderr] 7: 0x559906246f55 - std::sys_common::backtrace::print::h9767dc455a84e728 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:35:9 [INFO] [stderr] 8: 0x559906246f55 - std::panicking::default_hook::{{closure}}::h60afd6c8b12988ad [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:295:22 [INFO] [stderr] 9: 0x559906246c09 - std::panicking::default_hook::ha7b9bac6813f9d21 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:314:9 [INFO] [stderr] 10: 0x5599062474a2 - std::panicking::rust_panic_with_hook::h7b117a162a6f8664 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:698:17 [INFO] [stderr] 11: 0x559906247387 - std::panicking::begin_panic_handler::{{closure}}::h346750923c608600 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:588:13 [INFO] [stderr] 12: 0x559906245c64 - std::sys_common::backtrace::__rust_end_short_backtrace::h768c56c6a0c055c0 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:138:18 [INFO] [stderr] 13: 0x5599062470b9 - rust_begin_unwind [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:584:5 [INFO] [stderr] 14: 0x5599061344e3 - core::panicking::panic_fmt::h5c41cb2fa118fdbc [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/panicking.rs:143:14 [INFO] [stderr] 15: 0x5599061345d3 - core::result::unwrap_failed::h6bc7b183ec719494 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/result.rs:1785:5 [INFO] [stderr] 16: 0x55990613adcc - core::result::Result::unwrap::hf721e616e19e88a2 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/result.rs:1078:23 [INFO] [stderr] 17: 0x559906141f54 - build_script_build::check_device_feature::hedd93ea311dd610f [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/stm32f3xx-hal-0.7.0/build.rs:40:20 [INFO] [stderr] 18: 0x559906141e59 - build_script_build::main::ha8901f8f07ffd775 [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/stm32f3xx-hal-0.7.0/build.rs:14:5 [INFO] [stderr] 19: 0x55990613ff0b - core::ops::function::FnOnce::call_once::h80347b266453d04d [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/ops/function.rs:227:5 [INFO] [stderr] 20: 0x55990613fa6e - std::sys_common::backtrace::__rust_begin_short_backtrace::h5a7a41ebe88fcb32 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:122:18 [INFO] [stderr] 21: 0x55990613c011 - std::rt::lang_start::{{closure}}::h407a98312264db17 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/rt.rs:145:18 [INFO] [stderr] 22: 0x55990623f42e - core::ops::function::impls:: for &F>::call_once::hae31cd38f966dcbc [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/ops/function.rs:259:13 [INFO] [stderr] 23: 0x55990623f42e - std::panicking::try::do_call::h4a4c12a32b804624 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:492:40 [INFO] [stderr] 24: 0x55990623f42e - std::panicking::try::h87f80f5db1929b60 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:456:19 [INFO] [stderr] 25: 0x55990623f42e - std::panic::catch_unwind::hbc53afd5a2bdc195 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panic.rs:137:14 [INFO] [stderr] 26: 0x55990623f42e - std::rt::lang_start_internal::{{closure}}::h2e62ddd08385fac8 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/rt.rs:128:48 [INFO] [stderr] 27: 0x55990623f42e - std::panicking::try::do_call::h04b85b79b362213e [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:492:40 [INFO] [stderr] 28: 0x55990623f42e - std::panicking::try::h428fba6a4941d8ed [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:456:19 [INFO] [stderr] 29: 0x55990623f42e - std::panic::catch_unwind::hd73c90258412492e [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panic.rs:137:14 [INFO] [stderr] 30: 0x55990623f42e - std::rt::lang_start_internal::h26255896a96668b5 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/rt.rs:128:20 [INFO] [stderr] 31: 0x55990613bfe0 - std::rt::lang_start::hefa0061adfeb33c9 [INFO] [stderr] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/rt.rs:144:17 [INFO] [stderr] 32: 0x55990614286c - main [INFO] [stderr] 33: 0x7fbf85b030b3 - __libc_start_main [INFO] [stderr] 34: 0x55990613473e - _start [INFO] [stderr] 35: 0x0 - [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "ecab6d2b9e5c9e0692d1ec3ca259ab84c9fd9630a1c70b1548b4afbe8c084e3d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ecab6d2b9e5c9e0692d1ec3ca259ab84c9fd9630a1c70b1548b4afbe8c084e3d", kill_on_drop: false }` [INFO] [stdout] ecab6d2b9e5c9e0692d1ec3ca259ab84c9fd9630a1c70b1548b4afbe8c084e3d