[INFO] crate tiny 0.4.4 is already in cache
[INFO] extracting crate tiny 0.4.4 into work/ex/beta-1.37-6/sources/1.36.0/reg/tiny/0.4.4
[INFO] extracting crate tiny 0.4.4 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/tiny/0.4.4
[INFO] validating manifest of tiny-0.4.4 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tiny-0.4.4 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tiny-0.4.4
[INFO] finished frobbing tiny-0.4.4
[INFO] frobbed toml for tiny-0.4.4 written to work/ex/beta-1.37-6/sources/1.36.0/reg/tiny/0.4.4/Cargo.toml
[INFO] started frobbing tiny-0.4.4
[INFO] finished frobbing tiny-0.4.4
[INFO] frobbed toml for tiny-0.4.4 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/tiny/0.4.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tiny-0.4.4 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/tiny/0.4.4:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] a519055451222db7fd7a5f0dc64ea59500bf74f3f6baf50626cc239ca34dca06
[INFO] running `"docker" "start" "-a" "a519055451222db7fd7a5f0dc64ea59500bf74f3f6baf50626cc239ca34dca06"`
[INFO] [stderr]    Compiling libdbus-sys v0.2.0
[INFO] [stderr]    Compiling termbox_simple v0.2.2
[INFO] [stderr]    Compiling serde_yaml v0.7.5
[INFO] [stderr]    Compiling base64 v0.6.0
[INFO] [stderr]    Compiling term_input v0.1.5
[INFO] [stderr]    Compiling dbus v0.6.5
[INFO] [stderr]    Compiling notify-rust v3.6.0
[INFO] [stderr]    Compiling tiny v0.4.4 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(allocator_api)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(drain_filter)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(nll)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(ptr_offset_from)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Write` is imported redundantly
[INFO] [stderr]    --> src/conn.rs:476:17
[INFO] [stderr]     |
[INFO] [stderr] 5   | use std::io::Write;
[INFO] [stderr]     |     -------------- the item `Write` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 476 |             use std::io::Write;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `tiny`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a519055451222db7fd7a5f0dc64ea59500bf74f3f6baf50626cc239ca34dca06"`
[INFO] running `"docker" "rm" "-f" "a519055451222db7fd7a5f0dc64ea59500bf74f3f6baf50626cc239ca34dca06"`
[INFO] [stdout] a519055451222db7fd7a5f0dc64ea59500bf74f3f6baf50626cc239ca34dca06