[INFO] cloning repository https://github.com/tomaka/cargo-emscripten
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tomaka/cargo-emscripten" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomaka%2Fcargo-emscripten", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomaka%2Fcargo-emscripten'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d4eaa466e9c0f2cfcbcf828eda34ec5fd1f6d682
[INFO] documenting tomaka/cargo-emscripten against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomaka%2Fcargo-emscripten" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tomaka/cargo-emscripten on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tomaka/cargo-emscripten
[INFO] finished tweaking git repo https://github.com/tomaka/cargo-emscripten
[INFO] tweaked toml for git repo https://github.com/tomaka/cargo-emscripten written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/tomaka/cargo-emscripten already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang/cargo`
[INFO] [stderr]     Updating git submodule `https://github.com/rust-lang/rust-installer.git`
[INFO] [stderr]     Updating git submodule `https://github.com/rust-lang/rust-installer`
[INFO] [stderr] error: the lock file /workspace/builds/worker-1/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang/cargo`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustfix v0.5.1
[INFO] [stderr]   Downloaded humantime v2.0.1
[INFO] [stderr]   Downloaded im-rc v15.0.0
[INFO] [stderr]   Downloaded home v0.5.3
[INFO] [stderr]   Downloaded libnghttp2-sys v0.1.4+1.41.0
[INFO] [stderr]   Downloaded shell-escape v0.1.5
[INFO] [stderr]   Downloaded rustc-workspace-hack v1.0.0
[INFO] [stderr]   Downloaded serde_ignored v0.1.2
[INFO] [stderr]   Downloaded regex_macros v0.2.0
[INFO] [stderr]   Downloaded git2-curl v0.14.1
[INFO] [stderr]   Downloaded fwdansi v1.1.0
[INFO] [stderr]   Downloaded semver v0.10.0
[INFO] [stderr]   Downloaded tar v0.4.30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7098afcf1ea2d2772387d519bbc32e1c13622a1e3129ab45ba7b0d2fe0d6bf89
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7098afcf1ea2d2772387d519bbc32e1c13622a1e3129ab45ba7b0d2fe0d6bf89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7098afcf1ea2d2772387d519bbc32e1c13622a1e3129ab45ba7b0d2fe0d6bf89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7098afcf1ea2d2772387d519bbc32e1c13622a1e3129ab45ba7b0d2fe0d6bf89", kill_on_drop: false }`
[INFO] [stdout] 7098afcf1ea2d2772387d519bbc32e1c13622a1e3129ab45ba7b0d2fe0d6bf89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e617bf7687c699dd944c56088c4c61ec80d5003ee805b282a551d32d8f5c9ac2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e617bf7687c699dd944c56088c4c61ec80d5003ee805b282a551d32d8f5c9ac2", kill_on_drop: false }`
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `cargo-emscripten` in package `cargo-emscripten v0.0.1 (/opt/rustwide/workdir)` has the same output filename as the lib target `cargo_emscripten` in package `cargo-emscripten v0.0.1 (/opt/rustwide/workdir)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/doc/cargo_emscripten/index.html
[INFO] [stderr] The output filenames should be unique.
[INFO] [stderr] This is a known bug where multiple crates with the same name use
[INFO] [stderr] the same path; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] If this looks unexpected, it may be a bug in Cargo. Please file a bug report at
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/ with as much information as you
[INFO] [stderr] can provide.
[INFO] [stderr] cargo 1.47.0-beta (51b66125b 2020-08-19) running on `x86_64-unknown-linux-gnu` target `x86_64-unknown-linux-gnu`
[INFO] [stderr] First unit: Unit { pkg: Package { id: PackageId { name: "cargo-emscripten", version: "0.0.1", source: "/opt/rustwide/workdir" }, ..: ".." }, target: TargetInner { name: "cargo-emscripten", doc: true, ..: with_path("/opt/rustwide/workdir/src/bin/cargo-emscripten.rs", Edition2015) }, profile: Profile { name: "doc", debuginfo: Some(2), debug_assertions: true, overflow_checks: true, ..: default() }, kind: Host, mode: Doc { deps: false }, features: [] }
[INFO] [stderr] Second unit: Unit { pkg: Package { id: PackageId { name: "cargo-emscripten", version: "0.0.1", source: "/opt/rustwide/workdir" }, ..: ".." }, target: TargetInner { ..: lib_target("cargo_emscripten", ["lib"], "/opt/rustwide/workdir/src/lib.rs", Edition2015) }, profile: Profile { name: "doc", debuginfo: Some(2), debug_assertions: true, overflow_checks: true, ..: default() }, kind: Host, mode: Doc { deps: false }, features: [] }
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling tinyvec v0.3.4
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]    Compiling curl v0.4.33
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling ucd-util v0.1.8
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling regex-syntax v0.4.2
[INFO] [stderr]     Checking shell-escape v0.1.5
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking opener v0.4.1
[INFO] [stderr]     Checking bytesize v1.0.1
[INFO] [stderr]     Checking rustc-workspace-hack v1.0.0
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]     Checking home v0.5.3
[INFO] [stderr]     Checking humantime v2.0.1
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]    Compiling im-rc v15.0.0
[INFO] [stderr]     Checking vte v0.3.3
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]     Checking filetime v0.2.12
[INFO] [stderr]     Checking jobserver v0.1.21
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]     Checking strip-ansi-escapes v0.1.0
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking tar v0.4.30
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking ignore v0.4.16
[INFO] [stderr]    Compiling cc v1.0.59
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling url v2.1.1
[INFO] [stderr]     Checking sized-chunks v0.6.2
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling libssh2-sys v0.2.19
[INFO] [stderr]    Compiling libgit2-sys v0.12.12+1.0.1
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.4+1.41.0
[INFO] [stderr]    Compiling curl-sys v0.4.36+curl-7.71.1
[INFO] [stderr]    Compiling flate2 v1.0.17
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-0.2.11/src/lib.rs:522:34
[INFO] [stdout]     |
[INFO] [stdout] 522 | #![cfg_attr(feature = "pattern", feature(pattern))]
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cargo v0.49.0 (https://github.com/rust-lang/cargo#e1d3e136)
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regex`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e617bf7687c699dd944c56088c4c61ec80d5003ee805b282a551d32d8f5c9ac2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e617bf7687c699dd944c56088c4c61ec80d5003ee805b282a551d32d8f5c9ac2", kill_on_drop: false }`
[INFO] [stdout] e617bf7687c699dd944c56088c4c61ec80d5003ee805b282a551d32d8f5c9ac2