[INFO] crate telecord 0.1.3 is already in cache
[INFO] extracting crate telecord 0.1.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/telecord/0.1.3
[INFO] extracting crate telecord 0.1.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/telecord/0.1.3
[INFO] validating manifest of telecord-0.1.3 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of telecord-0.1.3 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing telecord-0.1.3
[INFO] finished frobbing telecord-0.1.3
[INFO] frobbed toml for telecord-0.1.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/telecord/0.1.3/Cargo.toml
[INFO] started frobbing telecord-0.1.3
[INFO] finished frobbing telecord-0.1.3
[INFO] frobbed toml for telecord-0.1.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/telecord/0.1.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing telecord-0.1.3 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/telecord/0.1.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 5e789649fa077a5558b3cdf0314ecf085a45d5c33a7634619acdf25be50ae2b4
[INFO] running `"docker" "start" "-a" "5e789649fa077a5558b3cdf0314ecf085a45d5c33a7634619acdf25be50ae2b4"`
[INFO] [stderr]    Compiling vec_shift v0.1.0
[INFO] [stderr]    Compiling telebot-derive v0.0.12
[INFO] [stderr]    Compiling derive-error-chain v0.10.1
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling mime-sniffer v0.1.2
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling multipart v0.13.6
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/telebot-derive-0.0.12/src/lib.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 |     #![feature(try_from)]
[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 `telebot-derive`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "5e789649fa077a5558b3cdf0314ecf085a45d5c33a7634619acdf25be50ae2b4"`
[INFO] running `"docker" "rm" "-f" "5e789649fa077a5558b3cdf0314ecf085a45d5c33a7634619acdf25be50ae2b4"`
[INFO] [stdout] 5e789649fa077a5558b3cdf0314ecf085a45d5c33a7634619acdf25be50ae2b4