[INFO] fetching crate sdb 0.0.10...
[INFO] testing sdb-0.0.10 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate sdb 0.0.10 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate sdb 0.0.10 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sdb 0.0.10
[INFO] finished tweaking crates.io crate sdb 0.0.10
[INFO] tweaked toml for crates.io crate sdb 0.0.10 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: the cargo feature `edition2021` has been stabilized in the 1.56 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/beta/cargo/reference/manifest.html#the-edition-field for more information about using this feature.
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sanakirja v1.2.11
[INFO] [stderr]   Downloaded desse-derive v0.2.1
[INFO] [stderr]   Downloaded sanakirja-core v1.2.13
[INFO] [stderr]   Downloaded sdb_macro v0.0.1
[INFO] [stderr]   Downloaded desse v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 136f6d7e55bfbea7281be1970baf1315fe936066a8bcb283e2a24b01d6b361b0
[INFO] running `Command { std: "docker" "start" "-a" "136f6d7e55bfbea7281be1970baf1315fe936066a8bcb283e2a24b01d6b361b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "136f6d7e55bfbea7281be1970baf1315fe936066a8bcb283e2a24b01d6b361b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "136f6d7e55bfbea7281be1970baf1315fe936066a8bcb283e2a24b01d6b361b0", kill_on_drop: false }`
[INFO] [stdout] 136f6d7e55bfbea7281be1970baf1315fe936066a8bcb283e2a24b01d6b361b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e964e2a2df30e3cbf77eeb891a8f4bf380f3a3c3ad82813ab1a4a52993945177
[INFO] running `Command { std: "docker" "start" "-a" "e964e2a2df30e3cbf77eeb891a8f4bf380f3a3c3ad82813ab1a4a52993945177", kill_on_drop: false }`
[INFO] [stderr] warning: the cargo feature `edition2021` has been stabilized in the 1.56 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/beta/cargo/reference/manifest.html#the-edition-field for more information about using this feature.
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling sanakirja-core v1.2.13
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling sdb_macro v0.0.1
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling sanakirja v1.2.11
[INFO] [stderr]    Compiling desse-derive v0.2.1
[INFO] [stderr]    Compiling desse v0.2.1
[INFO] [stderr]    Compiling sdb v0.0.10 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(decl_macro)]
[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 `sdb` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e964e2a2df30e3cbf77eeb891a8f4bf380f3a3c3ad82813ab1a4a52993945177", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e964e2a2df30e3cbf77eeb891a8f4bf380f3a3c3ad82813ab1a4a52993945177", kill_on_drop: false }`
[INFO] [stdout] e964e2a2df30e3cbf77eeb891a8f4bf380f3a3c3ad82813ab1a4a52993945177