[INFO] cloning repository https://github.com/sjrsjz/xlang-py
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sjrsjz/xlang-py" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjrsjz%2Fxlang-py", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjrsjz%2Fxlang-py'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f3cdd19770fd3a38eb617a526ab8bdbc17c2c95
[INFO] checking sjrsjz/xlang-py against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjrsjz%2Fxlang-py" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sjrsjz/xlang-py
[INFO] finished tweaking git repo https://github.com/sjrsjz/xlang-py
[INFO] tweaked toml for git repo https://github.com/sjrsjz/xlang-py written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sjrsjz/xlang-py on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sjrsjz/xlang-py 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dbe1918f6a0d942e76307b02b62a6771f76d2e5ca039f82ad7a4a2d71e2e1ad8
[INFO] running `Command { std: "docker" "start" "-a" "dbe1918f6a0d942e76307b02b62a6771f76d2e5ca039f82ad7a4a2d71e2e1ad8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbe1918f6a0d942e76307b02b62a6771f76d2e5ca039f82ad7a4a2d71e2e1ad8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbe1918f6a0d942e76307b02b62a6771f76d2e5ca039f82ad7a4a2d71e2e1ad8", kill_on_drop: false }`
[INFO] [stdout] dbe1918f6a0d942e76307b02b62a6771f76d2e5ca039f82ad7a4a2d71e2e1ad8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1425f877270e3e196e15dad9f7196ad4556995753da65899c35a3068186fe6b
[INFO] running `Command { std: "docker" "start" "-a" "b1425f877270e3e196e15dad9f7196ad4556995753da65899c35a3068186fe6b", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.13.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling indoc v2.0.6
[INFO] [stderr]     Checking unindent v0.2.4
[INFO] [stderr]    Compiling pyo3-build-config v0.24.2
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]    Compiling pyo3-ffi v0.24.2
[INFO] [stderr]    Compiling pyo3-macros-backend v0.24.2
[INFO] [stderr]    Compiling pyo3 v0.24.2
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]    Compiling pyo3-macros v0.24.2
[INFO] [stderr]     Checking serde_json v1.0.140
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking xlang_vm_core v0.1.6
[INFO] [stderr]     Checking xlang_frontend v0.1.5
[INFO] [stderr]     Checking xlang_py v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]   --> src/lib.rs:75:28
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn get_value(&self) -> i64 {
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMInt, Infallible>
[INFO] [stdout]   --> src/lib.rs:93:28
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn clone(&mut self) -> Self {
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/lib.rs:167:28
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn get_value(&self) -> f64 {
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMFloat, Infallible>
[INFO] [stdout]    --> src/lib.rs:184:28
[INFO] [stdout]     |
[INFO] [stdout] 184 |     fn clone(&mut self) -> Self {
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/lib.rs:258:28
[INFO] [stdout]     |
[INFO] [stdout] 258 |     fn get_value(&self) -> String {
[INFO] [stdout]     |                            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMString, Infallible>
[INFO] [stdout]    --> src/lib.rs:278:28
[INFO] [stdout]     |
[INFO] [stdout] 278 |     fn clone(&mut self) -> Self {
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMNull, Infallible>
[INFO] [stdout]    --> src/lib.rs:364:28
[INFO] [stdout]     |
[INFO] [stdout] 364 |     fn clone(&mut self) -> Self {
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Infallible>
[INFO] [stdout]    --> src/lib.rs:436:28
[INFO] [stdout]     |
[INFO] [stdout] 436 |     fn get_value(&self) -> Vec<u8> {
[INFO] [stdout]     |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMBytes, Infallible>
[INFO] [stdout]    --> src/lib.rs:474:28
[INFO] [stdout]     |
[INFO] [stdout] 474 |     fn clone(&mut self) -> Self {
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMInt>>
[INFO] [stdout]    --> src/lib.rs:723:12
[INFO] [stdout]     |
[INFO] [stdout] 723 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMInt>, Infallible>
[INFO] [stdout]    --> src/lib.rs:723:12
[INFO] [stdout]     |
[INFO] [stdout] 723 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMFloat>>
[INFO] [stdout]    --> src/lib.rs:729:12
[INFO] [stdout]     |
[INFO] [stdout] 729 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMFloat>, Infallible>
[INFO] [stdout]    --> src/lib.rs:729:12
[INFO] [stdout]     |
[INFO] [stdout] 729 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMString>>
[INFO] [stdout]    --> src/lib.rs:735:12
[INFO] [stdout]     |
[INFO] [stdout] 735 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMString>, Infallible>
[INFO] [stdout]    --> src/lib.rs:735:12
[INFO] [stdout]     |
[INFO] [stdout] 735 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMNull>>
[INFO] [stdout]    --> src/lib.rs:741:12
[INFO] [stdout]     |
[INFO] [stdout] 741 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMNull>, Infallible>
[INFO] [stdout]    --> src/lib.rs:741:12
[INFO] [stdout]     |
[INFO] [stdout] 741 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMBytes>>
[INFO] [stdout]    --> src/lib.rs:747:12
[INFO] [stdout]     |
[INFO] [stdout] 747 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMBytes>, Infallible>
[INFO] [stdout]    --> src/lib.rs:747:12
[INFO] [stdout]     |
[INFO] [stdout] 747 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMKeyVal>>
[INFO] [stdout]    --> src/lib.rs:753:12
[INFO] [stdout]     |
[INFO] [stdout] 753 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMKeyVal>, Infallible>
[INFO] [stdout]    --> src/lib.rs:753:12
[INFO] [stdout]     |
[INFO] [stdout] 753 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMNamed>>
[INFO] [stdout]    --> src/lib.rs:759:12
[INFO] [stdout]     |
[INFO] [stdout] 759 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMNamed>, Infallible>
[INFO] [stdout]    --> src/lib.rs:759:12
[INFO] [stdout]     |
[INFO] [stdout] 759 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMTuple>>
[INFO] [stdout]    --> src/lib.rs:765:12
[INFO] [stdout]     |
[INFO] [stdout] 765 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMTuple>, Infallible>
[INFO] [stdout]    --> src/lib.rs:765:12
[INFO] [stdout]     |
[INFO] [stdout] 765 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMWrapper>>
[INFO] [stdout]    --> src/lib.rs:772:12
[INFO] [stdout]     |
[INFO] [stdout] 772 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMWrapper>, Infallible>
[INFO] [stdout]    --> src/lib.rs:772:12
[INFO] [stdout]     |
[INFO] [stdout] 772 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMRange>>
[INFO] [stdout]    --> src/lib.rs:779:12
[INFO] [stdout]     |
[INFO] [stdout] 779 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMRange>, Infallible>
[INFO] [stdout]    --> src/lib.rs:779:12
[INFO] [stdout]     |
[INFO] [stdout] 779 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMObject>>
[INFO] [stdout]    --> src/lib.rs:782:12
[INFO] [stdout]     |
[INFO] [stdout] 782 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMObject>, Infallible>
[INFO] [stdout]    --> src/lib.rs:782:12
[INFO] [stdout]     |
[INFO] [stdout] 782 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]     --> src/lib.rs:1469:28
[INFO] [stdout]      |
[INFO] [stdout] 1469 |     fn get_start(&self) -> i64 {
[INFO] [stdout]      |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]     --> src/lib.rs:1474:26
[INFO] [stdout]      |
[INFO] [stdout] 1474 |     fn get_end(&self) -> i64 {
[INFO] [stdout]      |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]     --> src/lib.rs:1479:26
[INFO] [stdout]      |
[INFO] [stdout] 1479 |     fn get_key(&self) -> i64 {
[INFO] [stdout]      |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]     --> src/lib.rs:1484:28
[INFO] [stdout]      |
[INFO] [stdout] 1484 |     fn get_value(&self) -> i64 {
[INFO] [stdout]      |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMRange, Infallible>
[INFO] [stdout]     --> src/lib.rs:1505:24
[INFO] [stdout]      |
[INFO] [stdout] 1505 |     fn clone(&self) -> Self {
[INFO] [stdout]      |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMObject, Infallible>
[INFO] [stdout]     --> src/lib.rs:1595:28
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn clone(&mut self) -> Self {
[INFO] [stdout]      |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/lib.rs:1637:31
[INFO] [stdout]      |
[INFO] [stdout] 1637 |     fn object_count(&self) -> usize {
[INFO] [stdout]      |                               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMInt, Infallible>
[INFO] [stdout]     --> src/lib.rs:1647:42
[INFO] [stdout]      |
[INFO] [stdout] 1647 |     fn new_int(&mut self, value: i64) -> VMInt {
[INFO] [stdout]      |                                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMFloat, Infallible>
[INFO] [stdout]     --> src/lib.rs:1652:44
[INFO] [stdout]      |
[INFO] [stdout] 1652 |     fn new_float(&mut self, value: f64) -> VMFloat {
[INFO] [stdout]      |                                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMString, Infallible>
[INFO] [stdout]     --> src/lib.rs:1657:48
[INFO] [stdout]      |
[INFO] [stdout] 1657 |     fn new_string(&mut self, value: String) -> VMString {
[INFO] [stdout]      |                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMNull, Infallible>
[INFO] [stdout]     --> src/lib.rs:1662:31
[INFO] [stdout]      |
[INFO] [stdout] 1662 |     fn new_null(&mut self) -> VMNull {
[INFO] [stdout]      |                               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMBytes, Infallible>
[INFO] [stdout]     --> src/lib.rs:1667:48
[INFO] [stdout]      |
[INFO] [stdout] 1667 |     fn new_bytes(&mut self, value: Vec<u8>) -> VMBytes {
[INFO] [stdout]      |                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMRange, Infallible>
[INFO] [stdout]     --> src/lib.rs:1701:54
[INFO] [stdout]      |
[INFO] [stdout] 1701 |     fn new_range(&mut self, start: i64, end: i64) -> VMRange {
[INFO] [stdout]      |                                                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<WrappedPyFunction, Infallible>
[INFO] [stdout]     --> src/lib.rs:1706:37
[INFO] [stdout]      |
[INFO] [stdout] 1706 |     fn new_pyfunction(&mut self) -> WrappedPyFunction {
[INFO] [stdout]      |                                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `xlang_py` (lib) due to 45 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]   --> src/lib.rs:75:28
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn get_value(&self) -> i64 {
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMInt, Infallible>
[INFO] [stdout]   --> src/lib.rs:93:28
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn clone(&mut self) -> Self {
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/lib.rs:167:28
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn get_value(&self) -> f64 {
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMFloat, Infallible>
[INFO] [stdout]    --> src/lib.rs:184:28
[INFO] [stdout]     |
[INFO] [stdout] 184 |     fn clone(&mut self) -> Self {
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/lib.rs:258:28
[INFO] [stdout]     |
[INFO] [stdout] 258 |     fn get_value(&self) -> String {
[INFO] [stdout]     |                            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMString, Infallible>
[INFO] [stdout]    --> src/lib.rs:278:28
[INFO] [stdout]     |
[INFO] [stdout] 278 |     fn clone(&mut self) -> Self {
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMNull, Infallible>
[INFO] [stdout]    --> src/lib.rs:364:28
[INFO] [stdout]     |
[INFO] [stdout] 364 |     fn clone(&mut self) -> Self {
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Infallible>
[INFO] [stdout]    --> src/lib.rs:436:28
[INFO] [stdout]     |
[INFO] [stdout] 436 |     fn get_value(&self) -> Vec<u8> {
[INFO] [stdout]     |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMBytes, Infallible>
[INFO] [stdout]    --> src/lib.rs:474:28
[INFO] [stdout]     |
[INFO] [stdout] 474 |     fn clone(&mut self) -> Self {
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMInt>>
[INFO] [stdout]    --> src/lib.rs:723:12
[INFO] [stdout]     |
[INFO] [stdout] 723 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMInt>, Infallible>
[INFO] [stdout]    --> src/lib.rs:723:12
[INFO] [stdout]     |
[INFO] [stdout] 723 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMFloat>>
[INFO] [stdout]    --> src/lib.rs:729:12
[INFO] [stdout]     |
[INFO] [stdout] 729 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMFloat>, Infallible>
[INFO] [stdout]    --> src/lib.rs:729:12
[INFO] [stdout]     |
[INFO] [stdout] 729 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMString>>
[INFO] [stdout]    --> src/lib.rs:735:12
[INFO] [stdout]     |
[INFO] [stdout] 735 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMString>, Infallible>
[INFO] [stdout]    --> src/lib.rs:735:12
[INFO] [stdout]     |
[INFO] [stdout] 735 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMNull>>
[INFO] [stdout]    --> src/lib.rs:741:12
[INFO] [stdout]     |
[INFO] [stdout] 741 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMNull>, Infallible>
[INFO] [stdout]    --> src/lib.rs:741:12
[INFO] [stdout]     |
[INFO] [stdout] 741 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMBytes>>
[INFO] [stdout]    --> src/lib.rs:747:12
[INFO] [stdout]     |
[INFO] [stdout] 747 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMBytes>, Infallible>
[INFO] [stdout]    --> src/lib.rs:747:12
[INFO] [stdout]     |
[INFO] [stdout] 747 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMKeyVal>>
[INFO] [stdout]    --> src/lib.rs:753:12
[INFO] [stdout]     |
[INFO] [stdout] 753 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMKeyVal>, Infallible>
[INFO] [stdout]    --> src/lib.rs:753:12
[INFO] [stdout]     |
[INFO] [stdout] 753 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMNamed>>
[INFO] [stdout]    --> src/lib.rs:759:12
[INFO] [stdout]     |
[INFO] [stdout] 759 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMNamed>, Infallible>
[INFO] [stdout]    --> src/lib.rs:759:12
[INFO] [stdout]     |
[INFO] [stdout] 759 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMTuple>>
[INFO] [stdout]    --> src/lib.rs:765:12
[INFO] [stdout]     |
[INFO] [stdout] 765 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMTuple>, Infallible>
[INFO] [stdout]    --> src/lib.rs:765:12
[INFO] [stdout]     |
[INFO] [stdout] 765 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMWrapper>>
[INFO] [stdout]    --> src/lib.rs:772:12
[INFO] [stdout]     |
[INFO] [stdout] 772 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMWrapper>, Infallible>
[INFO] [stdout]    --> src/lib.rs:772:12
[INFO] [stdout]     |
[INFO] [stdout] 772 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMRange>>
[INFO] [stdout]    --> src/lib.rs:779:12
[INFO] [stdout]     |
[INFO] [stdout] 779 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMRange>, Infallible>
[INFO] [stdout]    --> src/lib.rs:779:12
[INFO] [stdout]     |
[INFO] [stdout] 779 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, pyo3::Bound<'_, VMObject>>
[INFO] [stdout]    --> src/lib.rs:782:12
[INFO] [stdout]     |
[INFO] [stdout] 782 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<pyo3::Bound<'_, VMObject>, Infallible>
[INFO] [stdout]    --> src/lib.rs:782:12
[INFO] [stdout]     |
[INFO] [stdout] 782 |         Ok(Py::new(py, py_obj)?.into_pyobject(py)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]     --> src/lib.rs:1469:28
[INFO] [stdout]      |
[INFO] [stdout] 1469 |     fn get_start(&self) -> i64 {
[INFO] [stdout]      |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]     --> src/lib.rs:1474:26
[INFO] [stdout]      |
[INFO] [stdout] 1474 |     fn get_end(&self) -> i64 {
[INFO] [stdout]      |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]     --> src/lib.rs:1479:26
[INFO] [stdout]      |
[INFO] [stdout] 1479 |     fn get_key(&self) -> i64 {
[INFO] [stdout]      |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]     --> src/lib.rs:1484:28
[INFO] [stdout]      |
[INFO] [stdout] 1484 |     fn get_value(&self) -> i64 {
[INFO] [stdout]      |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMRange, Infallible>
[INFO] [stdout]     --> src/lib.rs:1505:24
[INFO] [stdout]      |
[INFO] [stdout] 1505 |     fn clone(&self) -> Self {
[INFO] [stdout]      |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMObject, Infallible>
[INFO] [stdout]     --> src/lib.rs:1595:28
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn clone(&mut self) -> Self {
[INFO] [stdout]      |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/lib.rs:1637:31
[INFO] [stdout]      |
[INFO] [stdout] 1637 |     fn object_count(&self) -> usize {
[INFO] [stdout]      |                               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMInt, Infallible>
[INFO] [stdout]     --> src/lib.rs:1647:42
[INFO] [stdout]      |
[INFO] [stdout] 1647 |     fn new_int(&mut self, value: i64) -> VMInt {
[INFO] [stdout]      |                                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMFloat, Infallible>
[INFO] [stdout]     --> src/lib.rs:1652:44
[INFO] [stdout]      |
[INFO] [stdout] 1652 |     fn new_float(&mut self, value: f64) -> VMFloat {
[INFO] [stdout]      |                                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMString, Infallible>
[INFO] [stdout]     --> src/lib.rs:1657:48
[INFO] [stdout]      |
[INFO] [stdout] 1657 |     fn new_string(&mut self, value: String) -> VMString {
[INFO] [stdout]      |                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMNull, Infallible>
[INFO] [stdout]     --> src/lib.rs:1662:31
[INFO] [stdout]      |
[INFO] [stdout] 1662 |     fn new_null(&mut self) -> VMNull {
[INFO] [stdout]      |                               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMBytes, Infallible>
[INFO] [stdout]     --> src/lib.rs:1667:48
[INFO] [stdout]      |
[INFO] [stdout] 1667 |     fn new_bytes(&mut self, value: Vec<u8>) -> VMBytes {
[INFO] [stdout]      |                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<VMRange, Infallible>
[INFO] [stdout]     --> src/lib.rs:1701:54
[INFO] [stdout]      |
[INFO] [stdout] 1701 |     fn new_range(&mut self, start: i64, end: i64) -> VMRange {
[INFO] [stdout]      |                                                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<WrappedPyFunction, Infallible>
[INFO] [stdout]     --> src/lib.rs:1706:37
[INFO] [stdout]      |
[INFO] [stdout] 1706 |     fn new_pyfunction(&mut self) -> WrappedPyFunction {
[INFO] [stdout]      |                                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `xlang_py` (lib test) due to 45 previous errors
[INFO] running `Command { std: "docker" "inspect" "b1425f877270e3e196e15dad9f7196ad4556995753da65899c35a3068186fe6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1425f877270e3e196e15dad9f7196ad4556995753da65899c35a3068186fe6b", kill_on_drop: false }`
[INFO] [stdout] b1425f877270e3e196e15dad9f7196ad4556995753da65899c35a3068186fe6b