rwasm 2020.1.1

# rustc version
rustc 1.50.0-nightly (f74583445 2020-12-18)
# docs.rs version
docsrs 0.6.0 (4145c69 2020-12-19)

# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/rwasm-2020.1.1/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/rwasm-2020.1.1/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--cpus" "2" "--user" "1001:1001" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs\"" "-j2" "--" "-Z" "unstable-options" "--resource-suffix" "-20201218-1.50.0-nightly-f74583445" "--static-root-path" "/" "--cap-lints" "warn" "--disable-per-crate-search", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 193104f2c1f0d3a8e3859177a3c9d1354c3d92d992d76789ff9d22b227febc1f
[INFO] running `Command { std: "docker" "start" "-a" "193104f2c1f0d3a8e3859177a3c9d1354c3d92d992d76789ff9d22b227febc1f", kill_on_drop: false }`
[INFO] [stderr] /opt/crates-build-env/entrypoint.sh: line 7: /etc/hosts: Permission denied
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking addr2line v0.14.0
[INFO] [stderr]     Checking backtrace v0.3.55
[INFO] [stderr]  Documenting rwasm v2020.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: attribute should be applied to a function or static
[INFO] [stderr]   --> src/timer.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 |   #[no_mangle]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 50 | / extern "C" {
[INFO] [stderr] 51 | |     pub fn request_timeout(listener_id: u32, millis: u32);
[INFO] [stderr] 52 | | }
[INFO] [stderr]    | |_- not a function or static
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr] 
[INFO] [stderr] warning: attribute should be applied to a function or static
[INFO] [stderr]   --> src/wasm.rs:86:1
[INFO] [stderr]    |
[INFO] [stderr] 86 |   #[no_mangle]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 87 | / extern "C" {
[INFO] [stderr] 88 | |     pub fn upload_bytes(data: *const u8, length: usize) -> usize;
[INFO] [stderr] 89 | | }
[INFO] [stderr]    | |_- not a function or static
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.91s
[INFO] running `Command { std: "docker" "inspect" "193104f2c1f0d3a8e3859177a3c9d1354c3d92d992d76789ff9d22b227febc1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "193104f2c1f0d3a8e3859177a3c9d1354c3d92d992d76789ff9d22b227febc1f", kill_on_drop: false }`
[INFO] [stdout] 193104f2c1f0d3a8e3859177a3c9d1354c3d92d992d76789ff9d22b227febc1f