[INFO] updating cached repository reem/rust-n-queens
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/reem/rust-n-queens
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/reem/rust-n-queens" "work/ex/beta-1.38-1/sources/1.37.0/gh/reem/rust-n-queens"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/reem/rust-n-queens'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/reem/rust-n-queens" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/reem/rust-n-queens"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/reem/rust-n-queens'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9a6e9c463cc3e0d8bd7abc3dc818499cfc097ffa
[INFO] sha for GitHub repo reem/rust-n-queens: 9a6e9c463cc3e0d8bd7abc3dc818499cfc097ffa
[INFO] validating manifest of reem/rust-n-queens 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 reem/rust-n-queens 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 reem/rust-n-queens
[INFO] finished frobbing reem/rust-n-queens
[INFO] frobbed toml for reem/rust-n-queens written to work/ex/beta-1.38-1/sources/1.37.0/gh/reem/rust-n-queens/Cargo.toml
[INFO] started frobbing reem/rust-n-queens
[INFO] finished frobbing reem/rust-n-queens
[INFO] frobbed toml for reem/rust-n-queens written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/reem/rust-n-queens/Cargo.toml
[INFO] crate reem/rust-n-queens 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 reem/rust-n-queens against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/reem/rust-n-queens:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 8e6f4acae99d8dff2fc795e9102570775db667439f7a258bc06ad6f37dc6e2a2
[INFO] running `"docker" "start" "-a" "8e6f4acae99d8dff2fc795e9102570775db667439f7a258bc06ad6f37dc6e2a2"`
[INFO] [stderr]    Compiling nqueens v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] error: expected one of `)`, `,`, `.`, `?`, or an operator, found `{`
[INFO] [stderr]    --> src/main.rs:120:22
[INFO] [stderr]     |
[INFO] [stderr] 120 |         spawn(proc() {
[INFO] [stderr]     |                      ^ expected one of `)`, `,`, `.`, `?`, or an operator here
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/main.rs:129:23
[INFO] [stderr]     |
[INFO] [stderr] 129 |     let mut results = 0u;
[INFO] [stderr]     |                       ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/main.rs:141:25
[INFO] [stderr]     |
[INFO] [stderr] 141 |     for num in range(0, 9u) {
[INFO] [stderr]     |                         ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/main.rs:149:25
[INFO] [stderr]     |
[INFO] [stderr] 149 |     for num in range(0, 9u) {
[INFO] [stderr]     |                         ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]   --> src/main.rs:21:24
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn n_queens(n: i32) -> uint {
[INFO] [stderr]    |                        ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]   --> src/main.rs:23:39
[INFO] [stderr]    |
[INFO] [stderr] 23 |     return n_queens_helper((1 << n as uint) -1, 0, 0, 0);
[INFO] [stderr]    |                                       ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]   --> src/main.rs:45:87
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn n_queens_helper(all_ones: i32, left_diags: i32, columns: i32, right_diags: i32) -> uint {
[INFO] [stderr]    |                                                                                       ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/main.rs:100:50
[INFO] [stderr]     |
[INFO] [stderr] 100 |     return solutions + ((columns == all_ones) as uint)
[INFO] [stderr]     |                                                  ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/main.rs:108:33
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn parallel_n_queens(n: i32) -> uint {
[INFO] [stderr]     |                                 ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/main.rs:109:31
[INFO] [stderr]     |
[INFO] [stderr] 109 |     let all_ones = (1 << n as uint) - 1;
[INFO] [stderr]     |                               ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `channel` in this scope
[INFO] [stderr]    --> src/main.rs:115:20
[INFO] [stderr]     |
[INFO] [stderr] 115 |     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] 4   | use std::sync::mpsc::channel;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `spawn` in this scope
[INFO] [stderr]    --> src/main.rs:120:9
[INFO] [stderr]     |
[INFO] [stderr] 120 |         spawn(proc() {
[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] 4   | use std::thread::spawn;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `proc` in this scope
[INFO] [stderr]    --> src/main.rs:120:15
[INFO] [stderr]     |
[INFO] [stderr] 120 |         spawn(proc() {
[INFO] [stderr]     |               ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/main.rs:130:38
[INFO] [stderr]     |
[INFO] [stderr] 130 |     for value in rx.iter().take(n as uint) {
[INFO] [stderr]     |                                      ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/main.rs:133:48
[INFO] [stderr]     |
[INFO] [stderr] 133 |     return results + ((columns == all_ones) as uint)
[INFO] [stderr]     |                                                ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |             (columns | spot),
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/main.rs:124:17
[INFO] [stderr]     |
[INFO] [stderr] 124 |                 (columns | spot),
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 15 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0425.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: Could not compile `nqueens`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8e6f4acae99d8dff2fc795e9102570775db667439f7a258bc06ad6f37dc6e2a2"`
[INFO] running `"docker" "rm" "-f" "8e6f4acae99d8dff2fc795e9102570775db667439f7a258bc06ad6f37dc6e2a2"`
[INFO] [stdout] 8e6f4acae99d8dff2fc795e9102570775db667439f7a258bc06ad6f37dc6e2a2