failure 0.1.6

# rustc version
rustc 1.40.0-nightly (898f36c83 2019-10-10)# docs.rs version
docsrs 0.6.0 (4419dc8 2019-10-11)# build log
[INFO] running `"docker" "create" "-v" "/home/cratesfyi/workspace/builds/failure-0.1.6/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/failure-0.1.6/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" "MAP_USER_ID=1001" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=-Z unstable-options --resource-suffix -20191010-1.40.0-nightly-898f36c83 --static-root-path / --disable-per-crate-search --extern-html-root-url backtrace=https://docs.rs/backtrace/0.3.38 --extern-html-root-url failure_derive=https://docs.rs/failure_derive/0.1.6" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "doc" "--lib" "--no-deps" "--target" "x86_64-unknown-linux-gnu"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 10642cbe36694d98279a46fd6031909cfc5e141e216d0429978e5decc2921034
[INFO] running `"docker" "start" "-a" "10642cbe36694d98279a46fd6031909cfc5e141e216d0429978e5decc2921034"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]     Checking backtrace v0.3.38
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]  Documenting failure v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.93s
[INFO] running `"docker" "inspect" "10642cbe36694d98279a46fd6031909cfc5e141e216d0429978e5decc2921034"`
[INFO] running `"docker" "rm" "-f" "10642cbe36694d98279a46fd6031909cfc5e141e216d0429978e5decc2921034"`
[INFO] [stdout] 10642cbe36694d98279a46fd6031909cfc5e141e216d0429978e5decc2921034