[INFO] crate parmap 0.0.1 is already in cache
[INFO] extracting crate parmap 0.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/parmap/0.0.1
[INFO] extracting crate parmap 0.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/parmap/0.0.1
[INFO] validating manifest of parmap-0.0.1 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 parmap-0.0.1 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 parmap-0.0.1
[INFO] finished frobbing parmap-0.0.1
[INFO] frobbed toml for parmap-0.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/parmap/0.0.1/Cargo.toml
[INFO] started frobbing parmap-0.0.1
[INFO] finished frobbing parmap-0.0.1
[INFO] frobbed toml for parmap-0.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/parmap/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing parmap-0.0.1 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/parmap/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] cee8775e1faab23fce0a03b33b85fac55c2ebf95eb01d7a898bb14876341bbda
[INFO] running `"docker" "start" "-a" "cee8775e1faab23fce0a03b33b85fac55c2ebf95eb01d7a898bb14876341bbda"`
[INFO] [stderr]    Compiling parmap v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error: expected expression, found reserved identifier `_`
[INFO] [stderr]   --> src/lib.rs:29:57
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut pool = sync::TaskPool::new(8, || { proc(_) {} });
[INFO] [stderr]    |                                                         ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error: expected one of `.`, `;`, `?`, `}`, or an operator, found `{`
[INFO] [stderr]   --> src/lib.rs:29:60
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut pool = sync::TaskPool::new(8, || { proc(_) {} });
[INFO] [stderr]    |                                                            ^ expected one of `.`, `;`, `?`, `}`, or an operator here
[INFO] [stderr] 
[INFO] [stderr] error: expected expression, found reserved identifier `_`
[INFO] [stderr]   --> src/lib.rs:36:31
[INFO] [stderr]    |
[INFO] [stderr] 36 |             pool.execute(proc(_) {
[INFO] [stderr]    |                               ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error: expected one of `)`, `,`, `.`, `?`, or an operator, found `{`
[INFO] [stderr]   --> src/lib.rs:36:34
[INFO] [stderr]    |
[INFO] [stderr] 36 |             pool.execute(proc(_) {
[INFO] [stderr]    |                                  ^ expected one of `)`, `,`, `.`, `?`, or an operator here
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: non-builtin inner attributes are unstable
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![license = "MIT"]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/54726
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `license` in this scope
[INFO] [stderr]  --> src/lib.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![license = "MIT"]
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TaskPool` in `sync`
[INFO] [stderr]   --> src/lib.rs:29:30
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut pool = sync::TaskPool::new(8, || { proc(_) {} });
[INFO] [stderr]    |                              ^^^^^^^^ could not find `TaskPool` in `sync`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]   --> src/lib.rs:16:11
[INFO] [stderr]    |
[INFO] [stderr] 16 |     left: uint,
[INFO] [stderr]    |           ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Receiver` in this scope
[INFO] [stderr]   --> src/lib.rs:17:11
[INFO] [stderr]    |
[INFO] [stderr] 17 |     from: Receiver<R>
[INFO] [stderr]    |           ^^^^^^^^ not found in this scope
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 7  | use std::ops::Receiver;
[INFO] [stderr]    |
[INFO] [stderr] 7  | use std::sync::mpsc::Receiver;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `channel` in this scope
[INFO] [stderr]   --> src/lib.rs:32:24
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let (tx, rx) = channel();
[INFO] [stderr]    |                        ^^^^^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 7  | use std::sync::mpsc::channel;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of type arguments: expected 0, found 1
[INFO] [stderr]   --> src/lib.rs:27:27
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl<T: Send, I: Iterator<T>> Parallel<T> for I {
[INFO] [stderr]    |                           ^ unexpected type argument
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of type arguments: expected 0, found 1
[INFO] [stderr]   --> src/lib.rs:45:24
[INFO] [stderr]    |
[INFO] [stderr] 45 | impl<R: Send> Iterator<R> for ParMap<R> {
[INFO] [stderr]    |                        ^ unexpected type argument
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 12 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0107, E0412, E0425, E0433, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0107`.
[INFO] [stderr] error: Could not compile `parmap`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "cee8775e1faab23fce0a03b33b85fac55c2ebf95eb01d7a898bb14876341bbda"`
[INFO] running `"docker" "rm" "-f" "cee8775e1faab23fce0a03b33b85fac55c2ebf95eb01d7a898bb14876341bbda"`
[INFO] [stdout] cee8775e1faab23fce0a03b33b85fac55c2ebf95eb01d7a898bb14876341bbda