[INFO] cloning repository https://github.com/ul/org-tangle-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ul/org-tangle-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ful%2Forg-tangle-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ful%2Forg-tangle-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed64ad7211dcf9fe70f099b48bfa81acc73781a5
[INFO] testing ul/org-tangle-rs against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ful%2Forg-tangle-rs" "/workspace/builds/worker-51/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-51/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ul/org-tangle-rs on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ul/org-tangle-rs
[INFO] finished tweaking git repo https://github.com/ul/org-tangle-rs
[INFO] tweaked toml for git repo https://github.com/ul/org-tangle-rs written to /workspace/builds/worker-51/source/Cargo.toml
[INFO] crate git repo https://github.com/ul/org-tangle-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--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 atty v0.2.3
[INFO] [stderr]   Downloaded redox_syscall v0.1.32
[INFO] [stderr]   Downloaded unicode-xid v0.0.4
[INFO] [stderr]   Downloaded libc v0.2.34
[INFO] [stderr]   Downloaded vec_map v0.8.0
[INFO] [stderr]   Downloaded strsim v0.6.0
[INFO] [stderr]   Downloaded bitflags v1.0.1
[INFO] [stderr]   Downloaded ansi_term v0.10.2
[INFO] [stderr]   Downloaded clap v2.28.0
[INFO] [stderr]   Downloaded pest v1.0.0-beta.16
[INFO] [stderr]   Downloaded textwrap v0.9.0
[INFO] [stderr]   Downloaded unicode-width v0.1.4
[INFO] [stderr]   Downloaded pest_derive v1.0.0-beta.16
[INFO] [stderr]   Downloaded quote v0.3.15
[INFO] [stderr]   Downloaded syn v0.10.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50704a1c9a8ed8efc1585f28db6068a7fd9c4b341158329c84962d8c69d0cc75
[INFO] running `Command { std: "docker" "start" "-a" "50704a1c9a8ed8efc1585f28db6068a7fd9c4b341158329c84962d8c69d0cc75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50704a1c9a8ed8efc1585f28db6068a7fd9c4b341158329c84962d8c69d0cc75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50704a1c9a8ed8efc1585f28db6068a7fd9c4b341158329c84962d8c69d0cc75", kill_on_drop: false }`
[INFO] [stdout] 50704a1c9a8ed8efc1585f28db6068a7fd9c4b341158329c84962d8c69d0cc75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "RUSTFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 081d789497ad5b51351bba19a1084cc749a73d1854e5e4bba15748c48f8ae992
[INFO] running `Command { std: "docker" "start" "-a" "081d789497ad5b51351bba19a1084cc749a73d1854e5e4bba15748c48f8ae992", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling libc v0.2.34
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling bitflags v1.0.1
[INFO] [stderr]    Compiling ansi_term v0.10.2
[INFO] [stderr]    Compiling pest v1.0.0-beta.16
[INFO] [stderr]    Compiling vec_map v0.8.0
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling atty v0.2.3
[INFO] [stderr]    Compiling clap v2.28.0
[INFO] [stderr]    Compiling pest_derive v1.0.0-beta.16
[INFO] [stderr]    Compiling org-tangle 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(entry_and_modify)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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 `org-tangle` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "081d789497ad5b51351bba19a1084cc749a73d1854e5e4bba15748c48f8ae992", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "081d789497ad5b51351bba19a1084cc749a73d1854e5e4bba15748c48f8ae992", kill_on_drop: false }`
[INFO] [stdout] 081d789497ad5b51351bba19a1084cc749a73d1854e5e4bba15748c48f8ae992
