[INFO] crate term_fb 0.0.1 is already in cache
[INFO] extracting crate term_fb 0.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/term_fb/0.0.1
[INFO] extracting crate term_fb 0.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/term_fb/0.0.1
[INFO] validating manifest of term_fb-0.0.1 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 term_fb-0.0.1 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 term_fb-0.0.1
[INFO] finished frobbing term_fb-0.0.1
[INFO] frobbed toml for term_fb-0.0.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/term_fb/0.0.1/Cargo.toml
[INFO] started frobbing term_fb-0.0.1
[INFO] finished frobbing term_fb-0.0.1
[INFO] frobbed toml for term_fb-0.0.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/term_fb/0.0.1/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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing term_fb-0.0.1 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/term_fb/0.0.1:/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] 24a505f1b365d5b677961579da0170276cef511882e883848491bd9906089ced
[INFO] running `"docker" "start" "-a" "24a505f1b365d5b677961579da0170276cef511882e883848491bd9906089ced"`
[INFO] [stderr]    Compiling spin_sleep v0.3.7
[INFO] [stderr]    Compiling crossbeam v0.6.0
[INFO] [stderr]    Compiling term_fb v0.0.1 (/opt/crater/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(duration_float)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[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(range_contains)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `termios` is imported redundantly
[INFO] [stderr]    --> src/term.rs:111:19
[INFO] [stderr]     |
[INFO] [stderr] 111 |     use termios::{self, Termios};
[INFO] [stderr]     |                   ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/buf.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_float_secs` found for type `std::time::Duration` in the current scope
[INFO] [stderr]   --> src/sim_loop.rs:34:50
[INFO] [stderr]    |
[INFO] [stderr] 34 |                 buf.blit_float(1.0/loop_duration.as_float_secs(), 1, fps_xy);
[INFO] [stderr]    |                                                  ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `term_fb`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "24a505f1b365d5b677961579da0170276cef511882e883848491bd9906089ced"`
[INFO] running `"docker" "rm" "-f" "24a505f1b365d5b677961579da0170276cef511882e883848491bd9906089ced"`
[INFO] [stdout] 24a505f1b365d5b677961579da0170276cef511882e883848491bd9906089ced