[INFO] cloning repository https://github.com/WeCodingNow/mlua_serialization_bug_repro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/WeCodingNow/mlua_serialization_bug_repro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWeCodingNow%2Fmlua_serialization_bug_repro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWeCodingNow%2Fmlua_serialization_bug_repro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 736b79a63a79c2db504a623a3f73ad2bf1fcff0c
[INFO] documenting WeCodingNow/mlua_serialization_bug_repro against 1.100.0-beta.1 for beta-rustdoc-1.100
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWeCodingNow%2Fmlua_serialization_bug_repro" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/WeCodingNow/mlua_serialization_bug_repro
[INFO] finished tweaking git repo https://github.com/WeCodingNow/mlua_serialization_bug_repro
[INFO] tweaked toml for git repo https://github.com/WeCodingNow/mlua_serialization_bug_repro written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/WeCodingNow/mlua_serialization_bug_repro on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/WeCodingNow/mlua_serialization_bug_repro already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] e296485f0e58845ee913a1ce67723fb1de9da2dbb55c615c10d8f4958bf9f656
[INFO] running `Command { std: "docker" "start" "e296485f0e58845ee913a1ce67723fb1de9da2dbb55c615c10d8f4958bf9f656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e296485f0e58845ee913a1ce67723fb1de9da2dbb55c615c10d8f4958bf9f656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "e296485f0e58845ee913a1ce67723fb1de9da2dbb55c615c10d8f4958bf9f656" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e296485f0e58845ee913a1ce67723fb1de9da2dbb55c615c10d8f4958bf9f656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "e296485f0e58845ee913a1ce67723fb1de9da2dbb55c615c10d8f4958bf9f656" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling erased-serde v0.3.16
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling luajit-src v210.3.0+restyeced77f
[INFO] [stderr]    Compiling lua-src v543.1.0
[INFO] [stderr]    Compiling mlua v0.6.6
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling mlua_derive v0.6.0
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stdout] error[E0277]: the trait bound `!: FromLuaMulti<'_>` is not satisfied
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/mlua-0.6.6/src/lua.rs:2298:14
[INFO] [stdout]      |
[INFO] [stdout] 2298 |         self.call(())?;
[INFO] [stdout]      |              ^^^^ the trait `UserData` is not implemented for `!`
[INFO] [stdout] ...
[INFO] [stdout] 3178 | macro_rules! lua_userdata_impl {
[INFO] [stdout]      |
[INFO] [stdout] help: the following other types implement trait `UserData`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/mlua-0.6.6/src/lua.rs:3180:9
[INFO] [stdout]      |
[INFO] [stdout] 3180 |         impl<T: 'static + UserData> UserData for $type {
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         `Arc<std::sync::Mutex<T>>`
[INFO] [stdout]      |         `Arc<std::sync::RwLock<T>>`
[INFO] [stdout]      |         `Rc<RefCell<T>>`
[INFO] [stdout] ...
[INFO] [stdout] 3211 | lua_userdata_impl!(Rc<RefCell<T>>);
[INFO] [stdout]      | ---------------------------------- in this macro invocation
[INFO] [stdout] 3212 | lua_userdata_impl!(Arc<Mutex<T>>);
[INFO] [stdout]      | --------------------------------- in this macro invocation
[INFO] [stdout] 3213 | lua_userdata_impl!(Arc<RwLock<T>>);
[INFO] [stdout]      | ---------------------------------- in this macro invocation
[INFO] [stdout] note: required for `!` to implement `FromLua<'_>`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/mlua-0.6.6/src/conversion.rs:147:43
[INFO] [stdout]      |
[INFO] [stdout]  147 | impl<'lua, T: 'static + UserData + Clone> FromLua<'lua> for T {
[INFO] [stdout]      |                         --------          ^^^^^^^^^^^^^     ^
[INFO] [stdout]      |                         |
[INFO] [stdout]      |                         unsatisfied trait bound introduced here
[INFO] [stdout] note: required for `!` to implement `FromLuaMulti<'_>`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/mlua-0.6.6/src/multi.rs:37:30
[INFO] [stdout]      |
[INFO] [stdout]   37 | impl<'lua, T: FromLua<'lua>> FromLuaMulti<'lua> for T {
[INFO] [stdout]      |               -------------  ^^^^^^^^^^^^^^^^^^     ^
[INFO] [stdout]      |               |
[INFO] [stdout]      |               unsatisfied trait bound introduced here
[INFO] [stdout] note: required by a bound in `Chunk::<'lua, 'a>::call`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/mlua-0.6.6/src/lua.rs:2376:41
[INFO] [stdout]      |
[INFO] [stdout] 2253 | impl<'lua, 'a> Chunk<'lua, 'a> {
[INFO] [stdout] ...
[INFO] [stdout] 2376 |     pub fn call<A: ToLuaMulti<'lua>, R: FromLuaMulti<'lua>>(self, args: A) -> Result<R> {
[INFO] [stdout]      |                                         ^^^^^^^^^^^^^^^^^^ required by this bound in `Chunk::<'lua, 'a>::call`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mlua` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e296485f0e58845ee913a1ce67723fb1de9da2dbb55c615c10d8f4958bf9f656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e296485f0e58845ee913a1ce67723fb1de9da2dbb55c615c10d8f4958bf9f656", kill_on_drop: false }`
[INFO] [stdout] e296485f0e58845ee913a1ce67723fb1de9da2dbb55c615c10d8f4958bf9f656
