[INFO] fetching crate maplibre_native 0.3.0... [INFO] testing maplibre_native-0.3.0 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1 [INFO] extracting crate maplibre_native 0.3.0 into /workspace/builds/worker-6-tc2/source [INFO] started tweaking crates.io crate maplibre_native 0.3.0 [INFO] finished tweaking crates.io crate maplibre_native 0.3.0 [INFO] tweaked toml for crates.io crate maplibre_native 0.3.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate maplibre_native 0.3.0 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate maplibre_native 0.3.0 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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b92c489a78a58fbe337dbe67702c8f776b04d036a18fbdf42cd86c69b0eaf2be [INFO] running `Command { std: "docker" "start" "-a" "b92c489a78a58fbe337dbe67702c8f776b04d036a18fbdf42cd86c69b0eaf2be", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b92c489a78a58fbe337dbe67702c8f776b04d036a18fbdf42cd86c69b0eaf2be", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b92c489a78a58fbe337dbe67702c8f776b04d036a18fbdf42cd86c69b0eaf2be", kill_on_drop: false }` [INFO] [stdout] b92c489a78a58fbe337dbe67702c8f776b04d036a18fbdf42cd86c69b0eaf2be [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3754d3734472b803efc853421b6e95392c00c1f11cef7b373aca7f22d2d6440e [INFO] running `Command { std: "docker" "start" "-a" "3754d3734472b803efc853421b6e95392c00c1f11cef7b373aca7f22d2d6440e", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.101 [INFO] [stderr] Compiling libc v0.2.176 [INFO] [stderr] Compiling cc v1.2.38 [INFO] [stderr] Compiling futures-sink v0.3.31 [INFO] [stderr] Compiling slab v0.4.11 [INFO] [stderr] Compiling serde_core v1.0.227 [INFO] [stderr] Compiling smallvec v1.15.1 [INFO] [stderr] Compiling memchr v2.7.6 [INFO] [stderr] Compiling foreign-types-shared v0.1.1 [INFO] [stderr] Compiling percent-encoding v2.3.2 [INFO] [stderr] Compiling httparse v1.10.1 [INFO] [stderr] Compiling tower-service v0.3.3 [INFO] [stderr] Compiling serde v1.0.227 [INFO] [stderr] Compiling futures-channel v0.3.31 [INFO] [stderr] Compiling http-body v1.0.1 [INFO] [stderr] Compiling try-lock v0.2.5 [INFO] [stderr] Compiling zerocopy v0.8.27 [INFO] [stderr] Compiling tracing-core v0.1.34 [INFO] [stderr] Compiling atomic-waker v1.1.2 [INFO] [stderr] Compiling foreign-types v0.3.2 [INFO] [stderr] Compiling want v0.3.1 [INFO] [stderr] Compiling openssl-probe v0.1.6 [INFO] [stderr] Compiling form_urlencoded v1.2.2 [INFO] [stderr] Compiling sync_wrapper v1.0.2 [INFO] [stderr] Compiling ipnet v2.11.0 [INFO] [stderr] Compiling rustix v1.1.2 [INFO] [stderr] Compiling tower-layer v0.3.3 [INFO] [stderr] Compiling http-body-util v0.1.3 [INFO] [stderr] Compiling scratch v1.0.9 [INFO] [stderr] Compiling iri-string v0.7.8 [INFO] [stderr] Compiling tracing v0.1.41 [INFO] [stderr] Compiling zeroize v1.8.1 [INFO] [stderr] Compiling crc32fast v1.5.0 [INFO] [stderr] Compiling cxxbridge-flags v1.0.186 [INFO] [stderr] Compiling unicode-width v0.2.1 [INFO] [stderr] Compiling adler2 v2.0.1 [INFO] [stderr] Compiling miniz_oxide v0.8.9 [INFO] [stderr] Compiling cmake v0.1.54 [INFO] [stderr] Compiling thiserror v2.0.16 [INFO] [stderr] Compiling rustls-pki-types v1.12.0 [INFO] [stderr] Compiling codespan-reporting v0.12.0 [INFO] [stderr] Compiling foldhash v0.2.0 [INFO] [stderr] Compiling openssl-sys v0.9.109 [INFO] [stderr] Compiling link-cplusplus v1.0.12 [INFO] [stderr] Compiling cxx v1.0.186 [INFO] [stderr] Compiling quote v1.0.40 [INFO] [stderr] Compiling flate2 v1.1.2 [INFO] [stderr] Compiling syn v2.0.106 [INFO] [stderr] Compiling openssl v0.10.73 [INFO] [stderr] Compiling native-tls v0.2.14 [INFO] [stderr] Compiling mio v1.0.4 [INFO] [stderr] Compiling socket2 v0.6.0 [INFO] [stderr] Compiling getrandom v0.2.16 [INFO] [stderr] Compiling filetime v0.2.26 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling tokio v1.47.1 [INFO] [stderr] Compiling ppv-lite86 v0.2.21 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling xattr v1.6.1 [INFO] [stderr] Compiling tar v0.4.44 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling synstructure v0.13.2 [INFO] [stderr] Compiling cxx-build v1.0.186 [INFO] [stderr] Compiling hyper v1.7.0 [INFO] [stderr] Compiling zerovec-derive v0.11.1 [INFO] [stderr] Compiling displaydoc v0.2.5 [INFO] [stderr] Compiling futures-macro v0.3.31 [INFO] [stderr] Compiling serde_derive v1.0.227 [INFO] [stderr] Compiling openssl-macros v0.1.1 [INFO] [stderr] Compiling thiserror-impl v1.0.69 [INFO] [stderr] Compiling cxxbridge-macro v1.0.186 [INFO] [stderr] Compiling thiserror-impl v2.0.16 [INFO] [stderr] Compiling zerofrom-derive v0.1.6 [INFO] [stderr] Compiling yoke-derive v0.8.0 [INFO] [stderr] Compiling futures-util v0.3.31 [INFO] [stderr] Compiling zerofrom v0.1.6 [INFO] [stderr] Compiling thiserror v1.0.69 [INFO] [stderr] Compiling yoke v0.8.0 [INFO] [stderr] Compiling zerovec v0.11.4 [INFO] [stderr] Compiling zerotrie v0.2.2 [INFO] [stderr] Compiling tinystr v0.8.1 [INFO] [stderr] Compiling potential_utf v0.1.3 [INFO] [stderr] Compiling icu_locale_core v2.0.0 [INFO] [stderr] Compiling icu_collections v2.0.0 [INFO] [stderr] Compiling icu_provider v2.0.0 [INFO] [stderr] Compiling icu_properties v2.0.1 [INFO] [stderr] Compiling icu_normalizer v2.0.0 [INFO] [stderr] Compiling hyper-util v0.1.17 [INFO] [stderr] Compiling tower v0.5.2 [INFO] [stderr] Compiling futures-executor v0.3.31 [INFO] [stderr] Compiling futures v0.3.31 [INFO] [stderr] Compiling serde_urlencoded v0.7.1 [INFO] [stderr] Compiling tokio-native-tls v0.3.1 [INFO] [stderr] Compiling tower-http v0.6.6 [INFO] [stderr] Compiling idna_adapter v1.2.1 [INFO] [stderr] Compiling idna v1.1.0 [INFO] [stderr] Compiling url v2.5.7 [INFO] [stderr] Compiling hyper-tls v0.6.0 [INFO] [stderr] Compiling reqwest v0.12.23 [INFO] [stderr] Compiling downloader v0.2.8 [INFO] [stderr] Compiling maplibre_native v0.3.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: maplibre_native@0.3.0: Downloading precompiled maplibre-native core library from https://github.com/maplibre/maplibre-native/releases/download/core-9b6325a14e2cf1cc29ab28c1855ad376f1ba4903/libmaplibre-native-core-amalgam-linux-x64-vulkan.a into /opt/rustwide/target/debug/build/maplibre_native-f93694808022857d/out/maplibre-native [INFO] [stderr] warning: maplibre_native@0.3.0: Downloading headers for maplibre-native core library from https://github.com/maplibre/maplibre-native/releases/download/core-9b6325a14e2cf1cc29ab28c1855ad376f1ba4903/maplibre-native-headers.tar.gz into /opt/rustwide/target/debug/build/maplibre_native-f93694808022857d/out/maplibre-native [INFO] [stderr] error: failed to run custom build command for `maplibre_native v0.3.0 (/opt/rustwide/workdir)` [INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation. [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/maplibre_native-25b7a82ffff3f70e/build-script-build` (exit status: 101) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rerun-if-env-changed=DOCS_RS [INFO] [stderr] cargo:rerun-if-env-changed=MLN_CORE_LIBRARY_PATH [INFO] [stderr] cargo:rerun-if-env-changed=MLN_CORE_LIBRARY_HEADERS_PATH [INFO] [stderr] cargo:warning=Downloading precompiled maplibre-native core library from https://github.com/maplibre/maplibre-native/releases/download/core-9b6325a14e2cf1cc29ab28c1855ad376f1ba4903/libmaplibre-native-core-amalgam-linux-x64-vulkan.a into /opt/rustwide/target/debug/build/maplibre_native-f93694808022857d/out/maplibre-native [INFO] [stderr] cargo:warning=Downloading headers for maplibre-native core library from https://github.com/maplibre/maplibre-native/releases/download/core-9b6325a14e2cf1cc29ab28c1855ad376f1ba4903/maplibre-native-headers.tar.gz into /opt/rustwide/target/debug/build/maplibre_native-f93694808022857d/out/maplibre-native [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] [INFO] [stderr] thread 'main' (1854) panicked at build.rs:115:13: [INFO] [stderr] Unexpected error from downloader: Download failed for /opt/rustwide/target/debug/build/maplibre_native-f93694808022857d/out/maplibre-native/libmaplibre-native-core-amalgam-linux-x64-vulkan.a: (verification: unverified): [INFO] [stderr] 1: https://github.com/maplibre/maplibre-native/releases/download/core-9b6325a14e2cf1cc29ab28c1855ad376f1ba4903/libmaplibre-native-core-amalgam-linux-x64-vulkan.a with status 400 [INFO] [stderr] 2: https://github.com/maplibre/maplibre-native/releases/download/core-9b6325a14e2cf1cc29ab28c1855ad376f1ba4903/libmaplibre-native-core-amalgam-linux-x64-vulkan.a with status 400 [INFO] [stderr] 3: https://github.com/maplibre/maplibre-native/releases/download/core-9b6325a14e2cf1cc29ab28c1855ad376f1ba4903/libmaplibre-native-core-amalgam-linux-x64-vulkan.a with status 400 [INFO] [stderr] [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x5fac19af6822 - std::backtrace_rs::backtrace::libunwind::trace::hc4a5f428cfb78751 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stderr] 1: 0x5fac19af6822 - std::backtrace_rs::backtrace::trace_unsynchronized::h20e1095684b4c296 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stderr] 2: 0x5fac19af6822 - std::sys::backtrace::_print_fmt::h461f2e3a8f6b29e2 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/backtrace.rs:66:9 [INFO] [stderr] 3: 0x5fac19af6822 - ::fmt::h4ee3a75aa71a2c45 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/backtrace.rs:39:26 [INFO] [stderr] 4: 0x5fac19b1d18f - core::fmt::rt::Argument::fmt::h6f1564705cd089af [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/fmt/rt.rs:173:76 [INFO] [stderr] 5: 0x5fac19b1d18f - core::fmt::write::h21ca93b65a7c281a [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/fmt/mod.rs:1468:25 [INFO] [stderr] 6: 0x5fac19ae5213 - std::io::default_write_fmt::h745a1edf2999cb3b [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/io/mod.rs:639:11 [INFO] [stderr] 7: 0x5fac19ae5213 - std::io::Write::write_fmt::hfc56e66d6e189682 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/io/mod.rs:1954:13 [INFO] [stderr] 8: 0x5fac19af6e72 - std::sys::backtrace::BacktraceLock::print::h58d5d73f9e953cf1 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/backtrace.rs:42:9 [INFO] [stderr] 9: 0x5fac19ae102c - std::panicking::default_hook::{{closure}}::h1457fbe47c9457d1 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:301:27 [INFO] [stderr] 10: 0x5fac19ae0e66 - std::panicking::default_hook::hccb5e73b206c0830 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:328:9 [INFO] [stderr] 11: 0x5fac19ae1d3a - std::panicking::panic_with_hook::h3190ecc6229cdd29 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:834:13 [INFO] [stderr] 12: 0x5fac19af6c7a - std::panicking::panic_handler::{{closure}}::ha1f1b769bc2bb40c [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:707:13 [INFO] [stderr] 13: 0x5fac19af6bd9 - std::sys::backtrace::__rust_end_short_backtrace::h5f9cf66f19c2a172 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/sys/backtrace.rs:174:18 [INFO] [stderr] 14: 0x5fac19ae1a5d - __rustc[a93bd50104b99ad4]::rust_begin_unwind [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:698:5 [INFO] [stderr] 15: 0x5fac19b233c0 - core::panicking::panic_fmt::hc70c3c83f13c1375 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/panicking.rs:75:14 [INFO] [stderr] 16: 0x5fac194fe29d - build_script_build::download_static::h970012d33c4c0d78 [INFO] [stderr] 17: 0x5fac194fbfd7 - build_script_build::resolve_mln_core::hfc0ce4e54a499541 [INFO] [stderr] 18: 0x5fac194fe9e9 - build_script_build::build_mln::h4dea6c24b38fffc6 [INFO] [stderr] 19: 0x5fac194fe5af - build_script_build::main::h1fc7340ce04c5c9c [INFO] [stderr] 20: 0x5fac194fb763 - core::ops::function::FnOnce::call_once::h5eed15c9825c05e1 [INFO] [stderr] 21: 0x5fac194f7a06 - std::sys::backtrace::__rust_begin_short_backtrace::h1b97821b9bf537a7 [INFO] [stderr] 22: 0x5fac194f4bd9 - std::rt::lang_start::{{closure}}::hed1719c95c917bcc [INFO] [stderr] 23: 0x5fac19af7640 - core::ops::function::impls:: for &F>::call_once::hae16bf8966719858 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/core/src/ops/function.rs:290:21 [INFO] [stderr] 24: 0x5fac19af7640 - std::panicking::catch_unwind::do_call::hd4eb7cf01d0f66cd [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:590:40 [INFO] [stderr] 25: 0x5fac19af7640 - std::panicking::catch_unwind::h35b4afc45093edf5 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:553:19 [INFO] [stderr] 26: 0x5fac19af7640 - std::panic::catch_unwind::h5a7ef11ac2fa7980 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panic.rs:359:14 [INFO] [stderr] 27: 0x5fac19af7640 - std::rt::lang_start_internal::{{closure}}::h18f8e059e8eb5f5a [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/rt.rs:175:24 [INFO] [stderr] 28: 0x5fac19af7640 - std::panicking::catch_unwind::do_call::hb4f94f34ea41283f [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:590:40 [INFO] [stderr] 29: 0x5fac19af7640 - std::panicking::catch_unwind::hfbb31091ea806204 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panicking.rs:553:19 [INFO] [stderr] 30: 0x5fac19af7640 - std::panic::catch_unwind::hc88f452387620cfb [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/panic.rs:359:14 [INFO] [stderr] 31: 0x5fac19af7640 - std::rt::lang_start_internal::h23cfb6dcbf9c9010 [INFO] [stderr] at /rustc/b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b/library/std/src/rt.rs:171:5 [INFO] [stderr] 32: 0x5fac194f4bc1 - std::rt::lang_start::h1745fb5214f7c8e3 [INFO] [stderr] 33: 0x5fac19500a75 - main [INFO] [stderr] 34: 0x718d313f21ca - [INFO] [stderr] 35: 0x718d313f228b - __libc_start_main [INFO] [stderr] 36: 0x5fac194f2f65 - _start [INFO] [stderr] 37: 0x0 - [INFO] running `Command { std: "docker" "inspect" "3754d3734472b803efc853421b6e95392c00c1f11cef7b373aca7f22d2d6440e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3754d3734472b803efc853421b6e95392c00c1f11cef7b373aca7f22d2d6440e", kill_on_drop: false }` [INFO] [stdout] 3754d3734472b803efc853421b6e95392c00c1f11cef7b373aca7f22d2d6440e