[INFO] crate tg_botapi 0.6.0-alpha.2 is already in cache
[INFO] testing tg_botapi-0.6.0-alpha.2 against 1.38.0 for beta-1.39-1
[INFO] extracting crate tg_botapi 0.6.0-alpha.2 into work/builds/worker-1/source
[INFO] validating manifest of crates.io crate tg_botapi 0.6.0-alpha.2 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate tg_botapi 0.6.0-alpha.2
[INFO] finished tweaking crates.io crate tg_botapi 0.6.0-alpha.2
[INFO] tweaked toml for crates.io crate tg_botapi 0.6.0-alpha.2 written to work/builds/worker-1/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 019b8a0bda74c4b4d6ffa3aca7537b2bb499b25991ddfaf5b04ca50b53240ce8
[INFO] running `"docker" "start" "-a" "019b8a0bda74c4b4d6ffa3aca7537b2bb499b25991ddfaf5b04ca50b53240ce8"`
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling trust-dns-proto v0.7.4
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling trust-dns-resolver v0.11.1
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling reqwest v0.9.21
[INFO] [stderr]    Compiling tg_botapi v0.6.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(async_await)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `tg_botapi`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "019b8a0bda74c4b4d6ffa3aca7537b2bb499b25991ddfaf5b04ca50b53240ce8"`
[INFO] running `"docker" "rm" "-f" "019b8a0bda74c4b4d6ffa3aca7537b2bb499b25991ddfaf5b04ca50b53240ce8"`
[INFO] [stdout] 019b8a0bda74c4b4d6ffa3aca7537b2bb499b25991ddfaf5b04ca50b53240ce8