[INFO] updating cached repository Mistodon/chessjam
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Mistodon/chessjam
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Mistodon/chessjam" "work/ex/beta-1.38-1/sources/1.37.0/gh/Mistodon/chessjam"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Mistodon/chessjam'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Mistodon/chessjam" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Mistodon/chessjam"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Mistodon/chessjam'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d8efdd02324817fcc7e3d78df193d4035272758a
[INFO] sha for GitHub repo Mistodon/chessjam: d8efdd02324817fcc7e3d78df193d4035272758a
[INFO] validating manifest of Mistodon/chessjam 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 Mistodon/chessjam 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 Mistodon/chessjam
[INFO] finished frobbing Mistodon/chessjam
[INFO] frobbed toml for Mistodon/chessjam written to work/ex/beta-1.38-1/sources/1.37.0/gh/Mistodon/chessjam/Cargo.toml
[INFO] started frobbing Mistodon/chessjam
[INFO] finished frobbing Mistodon/chessjam
[INFO] frobbed toml for Mistodon/chessjam written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Mistodon/chessjam/Cargo.toml
[INFO] crate Mistodon/chessjam 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 Mistodon/chessjam 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-3/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/Mistodon/chessjam:/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] 5281ea1d5812ef968cbb0cffe671ac3aebbbbc6dd5c324b70f4f896ac211f96a
[INFO] running `"docker" "start" "-a" "5281ea1d5812ef968cbb0cffe671ac3aebbbbc6dd5c324b70f4f896ac211f96a"`
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling prefetch v0.2.0
[INFO] [stderr]    Compiling mucow v0.1.0
[INFO] [stderr]    Compiling okmath v0.1.0 (https://github.com/mistodon/okmath#b44f1888)
[INFO] [stderr]    Compiling resource v0.2.0
[INFO] [stderr]    Compiling rand v0.5.4
[INFO] [stderr]    Compiling libz-sys v1.0.18
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr] error[E0425]: cannot find function `unreachable` in module `std::mem`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.0.0/src/nightly_lazy.rs:30:35
[INFO] [stderr]    |
[INFO] [stderr] 30 |                 None => std::mem::unreachable(),
[INFO] [stderr]    |                                   ^^^^^^^^^^^ not found in `std::mem`
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 10 | use lazy::std::intrinsics::unreachable;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.0.0/src/lib.rs:104:32
[INFO] [stderr]     |
[INFO] [stderr] 104 | #![cfg_attr(feature="nightly", feature(unreachable))]
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `lazy_static`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/prefetch-0.2.0/src/lib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | #![feature(link_llvm_intrinsics)]
[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 `prefetch`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "5281ea1d5812ef968cbb0cffe671ac3aebbbbc6dd5c324b70f4f896ac211f96a"`
[INFO] running `"docker" "rm" "-f" "5281ea1d5812ef968cbb0cffe671ac3aebbbbc6dd5c324b70f4f896ac211f96a"`
[INFO] [stdout] 5281ea1d5812ef968cbb0cffe671ac3aebbbbc6dd5c324b70f4f896ac211f96a