[INFO] crate whitespacers 0.2.0 is already in cache
[INFO] extracting crate whitespacers 0.2.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/whitespacers/0.2.0
[INFO] extracting crate whitespacers 0.2.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/whitespacers/0.2.0
[INFO] validating manifest of whitespacers-0.2.0 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 whitespacers-0.2.0 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 whitespacers-0.2.0
[INFO] finished frobbing whitespacers-0.2.0
[INFO] frobbed toml for whitespacers-0.2.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/whitespacers/0.2.0/Cargo.toml
[INFO] started frobbing whitespacers-0.2.0
[INFO] finished frobbing whitespacers-0.2.0
[INFO] frobbed toml for whitespacers-0.2.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/whitespacers/0.2.0/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 whitespacers-0.2.0 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-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/whitespacers/0.2.0:/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] 2a9408ab0035e2014b9a2774ca39a7c1d11c76d04ef9c2b308a1c7480bbfd424
[INFO] running `"docker" "start" "-a" "2a9408ab0035e2014b9a2774ca39a7c1d11c76d04ef9c2b308a1c7480bbfd424"`
[INFO] [stderr]    Compiling memmap v0.6.2
[INFO] [stderr]    Compiling dynasm v0.2.3
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling crossbeam v0.7.2
[INFO] [stderr]    Compiling dynasmrt v0.2.3
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dynasm-0.2.3/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(plugin_registrar, rustc_private)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dynasm-0.2.3/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dynasm-0.2.3/src/lib.rs:51:64
[INFO] [stderr]    |
[INFO] [stderr] 51 |                                       allow_internal_unstable: false,
[INFO] [stderr]    |                                                                ^^^^^ expected enum `std::option::Option`, found bool
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::option::Option<std::rc::Rc<[syntax::ast::Name]>>`
[INFO] [stderr]               found type `bool`
[INFO] [stderr] 
[INFO] [stderr] error[E0063]: missing field `source` in initializer of `syntax::ast::Local`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dynasm-0.2.3/src/serialize.rs:290:38
[INFO] [stderr]     |
[INFO] [stderr] 290 |         node: ast::StmtKind::Local(P(ast::Local {
[INFO] [stderr]     |                                      ^^^^^^^^^^ missing `source`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0063, E0308, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0063`.
[INFO] [stderr] error: Could not compile `dynasm`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2a9408ab0035e2014b9a2774ca39a7c1d11c76d04ef9c2b308a1c7480bbfd424"`
[INFO] running `"docker" "rm" "-f" "2a9408ab0035e2014b9a2774ca39a7c1d11c76d04ef9c2b308a1c7480bbfd424"`
[INFO] [stdout] 2a9408ab0035e2014b9a2774ca39a7c1d11c76d04ef9c2b308a1c7480bbfd424