[INFO] cloning repository https://github.com/samwho/rust-debugger
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/samwho/rust-debugger" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamwho%2Frust-debugger", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamwho%2Frust-debugger'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b0a245dcfa8023e0d7778c516e473c64dcb2e724
[INFO] documenting samwho/rust-debugger 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%2Fsamwho%2Frust-debugger" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samwho/rust-debugger 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/samwho/rust-debugger
[INFO] finished tweaking git repo https://github.com/samwho/rust-debugger
[INFO] tweaked toml for git repo https://github.com/samwho/rust-debugger written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/samwho/rust-debugger 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]  Downloading crates ...
[INFO] [stderr]   Downloaded iced-x86 v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] eb4cdd041a4ad35c30d867f8c041bd1e10519847a5e8c4f2499d4c6ccf581a30
[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" "eb4cdd041a4ad35c30d867f8c041bd1e10519847a5e8c4f2499d4c6ccf581a30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb4cdd041a4ad35c30d867f8c041bd1e10519847a5e8c4f2499d4c6ccf581a30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb4cdd041a4ad35c30d867f8c041bd1e10519847a5e8c4f2499d4c6ccf581a30", kill_on_drop: false }`
[INFO] [stdout] eb4cdd041a4ad35c30d867f8c041bd1e10519847a5e8c4f2499d4c6ccf581a30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] bfb7ea4c6605d1407c2c53b856c944fe6c138c8d8ae44531ca8e8381b12be026
[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" "bfb7ea4c6605d1407c2c53b856c944fe6c138c8d8ae44531ca8e8381b12be026", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling target-lexicon v0.10.0
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]     Checking smallvec v1.3.0
[INFO] [stderr]     Checking wasmparser v0.51.4
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]     Checking elf v0.0.10
[INFO] [stderr]    Compiling iced-x86 v1.1.0
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking gimli v0.20.0
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking flate2 v1.0.14
[INFO] [stderr]     Checking termion v1.5.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking tui v0.9.1
[INFO] [stderr]     Checking object v0.18.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking os_type v2.2.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rustyline v6.1.2
[INFO] [stderr]     Checking human-panic v1.0.3
[INFO] [stderr]  Documenting rust-debugger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(str_strip)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `rust-debugger`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name rust_debugger src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern elf=/opt/rustwide/target/debug/deps/libelf-6651736115e8bb49.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-c3da4dab14140bb2.rmeta --extern gimli=/opt/rustwide/target/debug/deps/libgimli-dc3d6703cd9080eb.rmeta --extern human_panic=/opt/rustwide/target/debug/deps/libhuman_panic-1b4b92df94484ad5.rmeta --extern iced_x86=/opt/rustwide/target/debug/deps/libiced_x86-4ea0f7e60f806141.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-7d79652dcdcf1f7d.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-69d9a7f018cb28c7.rmeta --extern memmap=/opt/rustwide/target/debug/deps/libmemmap-ab658b290c7fc67a.rmeta --extern object=/opt/rustwide/target/debug/deps/libobject-e4234d490f92fe42.rmeta --extern rustyline=/opt/rustwide/target/debug/deps/librustyline-707751154e48ebdd.rmeta --extern termion=/opt/rustwide/target/debug/deps/libtermion-9ef33e0310a86f71.rmeta --extern tui=/opt/rustwide/target/debug/deps/libtui-6084c5978ce54077.rmeta --extern unicode_width=/opt/rustwide/target/debug/deps/libunicode_width-c174b2e26bac73a7.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "bfb7ea4c6605d1407c2c53b856c944fe6c138c8d8ae44531ca8e8381b12be026", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfb7ea4c6605d1407c2c53b856c944fe6c138c8d8ae44531ca8e8381b12be026", kill_on_drop: false }`
[INFO] [stdout] bfb7ea4c6605d1407c2c53b856c944fe6c138c8d8ae44531ca8e8381b12be026