[INFO] updating cached repository ticki/b
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ticki/b
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ticki/b" "work/ex/beta-1.38-1/sources/1.37.0/gh/ticki/b"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ticki/b'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ticki/b" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ticki/b"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ticki/b'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8b155633ed5c8e2dba46b1fceb52562df1c6cccd
[INFO] sha for GitHub repo ticki/b: 8b155633ed5c8e2dba46b1fceb52562df1c6cccd
[INFO] validating manifest of ticki/b 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 ticki/b 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 ticki/b
[INFO] finished frobbing ticki/b
[INFO] frobbed toml for ticki/b written to work/ex/beta-1.38-1/sources/1.37.0/gh/ticki/b/Cargo.toml
[INFO] started frobbing ticki/b
[INFO] finished frobbing ticki/b
[INFO] frobbed toml for ticki/b written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ticki/b/Cargo.toml
[INFO] crate ticki/b already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ticki/b against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ticki/b:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 8f8a97cab08523c31644bd1e08541ab11cf363259ca5effe66b8fe9f094b2177
[INFO] running `"docker" "start" "-a" "8f8a97cab08523c31644bd1e08541ab11cf363259ca5effe66b8fe9f094b2177"`
[INFO] [stderr]    Compiling jemalloc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(core)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `IndexMut`, `Index`
[INFO] [stderr]  --> src/memory.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 | use core::ops::{Index, IndexMut};
[INFO] [stderr]   |                 ^^^^^  ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `cmp`, `intrinsics`
[INFO] [stderr]  --> src/memory.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | use core::{cmp, intrinsics, mem};
[INFO] [stderr]   |            ^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/memory.rs:119:30
[INFO] [stderr]     |
[INFO] [stderr] 119 |         MemoryState::from_u8(((ptr::read_u8((self.ptr + byte) as *mut u8) >> bit) & 0b11))
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `jemalloc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8f8a97cab08523c31644bd1e08541ab11cf363259ca5effe66b8fe9f094b2177"`
[INFO] running `"docker" "rm" "-f" "8f8a97cab08523c31644bd1e08541ab11cf363259ca5effe66b8fe9f094b2177"`
[INFO] [stdout] 8f8a97cab08523c31644bd1e08541ab11cf363259ca5effe66b8fe9f094b2177