[INFO] updating cached repository fuyangli/piston
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fuyangli/piston
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fuyangli/piston" "work/ex/beta-1.37-6/sources/1.36.0/gh/fuyangli/piston"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/fuyangli/piston'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fuyangli/piston" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fuyangli/piston"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fuyangli/piston'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4e41a298a4d277c7f06035c754efc07b14284571
[INFO] sha for GitHub repo fuyangli/piston: 4e41a298a4d277c7f06035c754efc07b14284571
[INFO] validating manifest of fuyangli/piston 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 fuyangli/piston 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 fuyangli/piston
[INFO] finished frobbing fuyangli/piston
[INFO] frobbed toml for fuyangli/piston written to work/ex/beta-1.37-6/sources/1.36.0/gh/fuyangli/piston/Cargo.toml
[INFO] started frobbing fuyangli/piston
[INFO] finished frobbing fuyangli/piston
[INFO] frobbed toml for fuyangli/piston written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fuyangli/piston/Cargo.toml
[INFO] crate fuyangli/piston already has a lockfile, it will not be regenerated
[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 fuyangli/piston against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fuyangli/piston:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 1a4b1ed86f10ef8d0e734abf5a6c7649274c0b30814dc2e5a403fda53feb53e9
[INFO] running `"docker" "start" "-a" "1a4b1ed86f10ef8d0e734abf5a6c7649274c0b30814dc2e5a403fda53feb53e9"`
[INFO] [stderr]    Compiling wrapping_macros v0.4.13
[INFO] [stderr]    Compiling draw_state v0.8.0
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling shared_library v0.1.8
[INFO] [stderr]    Compiling stb_truetype v0.2.2
[INFO] [stderr]    Compiling tcod-sys v4.1.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.0
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling ordered-float v0.5.0
[INFO] [stderr]    Compiling quaternion v0.3.0
[INFO] [stderr]    Compiling wayland-protocols v0.12.5
[INFO] [stderr] error[E0432]: unresolved import `syntax::codemap`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/wrapping_macros-0.4.13/src/lib.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 | use syntax::codemap::Span;
[INFO] [stderr]   |             ^^^^^^^ could not find `codemap` in `syntax`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved imports `syntax::fold`, `syntax::fold`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/wrapping_macros-0.4.13/src/lib.rs:12:20
[INFO] [stderr]    |
[INFO] [stderr] 12 | use syntax::fold::{self, Folder};
[INFO] [stderr]    |             ^^^^   ^^^^ no `fold` in the root
[INFO] [stderr]    |             |
[INFO] [stderr]    |             could not find `fold` in `syntax`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `syntax::tokenstream::Delimited`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/wrapping_macros-0.4.13/src/lib.rs:16:27
[INFO] [stderr]    |
[INFO] [stderr] 16 | use syntax::tokenstream::{Delimited, TokenStream, TokenTree};
[INFO] [stderr]    |                           ^^^^^^^^^ no `Delimited` in `tokenstream`
[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/wrapping_macros-0.4.13/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(plugin_registrar, rustc_private)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `wrapping_macros`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1a4b1ed86f10ef8d0e734abf5a6c7649274c0b30814dc2e5a403fda53feb53e9"`
[INFO] running `"docker" "rm" "-f" "1a4b1ed86f10ef8d0e734abf5a6c7649274c0b30814dc2e5a403fda53feb53e9"`
[INFO] [stdout] 1a4b1ed86f10ef8d0e734abf5a6c7649274c0b30814dc2e5a403fda53feb53e9