[INFO] crate woot 0.1.2 is already in cache
[INFO] extracting crate woot 0.1.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/woot/0.1.2
[INFO] extracting crate woot 0.1.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/woot/0.1.2
[INFO] validating manifest of woot-0.1.2 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 woot-0.1.2 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 woot-0.1.2
[INFO] finished frobbing woot-0.1.2
[INFO] frobbed toml for woot-0.1.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/woot/0.1.2/Cargo.toml
[INFO] started frobbing woot-0.1.2
[INFO] finished frobbing woot-0.1.2
[INFO] frobbed toml for woot-0.1.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/woot/0.1.2/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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing woot-0.1.2 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/woot/0.1.2:/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] 52cd777cf978b1ebc7ed96b292291b576e7993bcf4a12e039927b81a2af5d587
[INFO] running `"docker" "start" "-a" "52cd777cf978b1ebc7ed96b292291b576e7993bcf4a12e039927b81a2af5d587"`
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling woot v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:243:24
[INFO] [stderr]     |
[INFO] [stderr] 243 |             .batching(|mut it| match (it.next(), it.peek()) {
[INFO] [stderr]     |                        ----^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.91s
[INFO] running `"docker" "inspect" "52cd777cf978b1ebc7ed96b292291b576e7993bcf4a12e039927b81a2af5d587"`
[INFO] running `"docker" "rm" "-f" "52cd777cf978b1ebc7ed96b292291b576e7993bcf4a12e039927b81a2af5d587"`
[INFO] [stdout] 52cd777cf978b1ebc7ed96b292291b576e7993bcf4a12e039927b81a2af5d587
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/woot/0.1.2:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] b9562ea2065905a829d0e898124956edecab714f4632c60fc83ddc9081bd712a
[INFO] running `"docker" "start" "-a" "b9562ea2065905a829d0e898124956edecab714f4632c60fc83ddc9081bd712a"`
[INFO] [stderr]    Compiling woot v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0107]: wrong number of type arguments: expected 2, found 1
[INFO] [stderr]  --> tests/brute.rs:8:10
[INFO] [stderr]   |
[INFO] [stderr] 8 | type W = WString<u8>;
[INFO] [stderr]   |          ^^^^^^^^^^^ expected 2 type arguments
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of type arguments: expected 2, found 1
[INFO] [stderr]   --> tests/brute.rs:10:23
[INFO] [stderr]    |
[INFO] [stderr] 10 | struct E (u64, usize, Operation<u8>);
[INFO] [stderr]    |                       ^^^^^^^^^^^^^ expected 2 type arguments
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0107`.
[INFO] [stderr] error: Could not compile `woot`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0061]: this function takes 3 parameters but 2 parameters were supplied
[INFO] [stderr]  --> tests/tp2.rs:7:7
[INFO] [stderr]   |
[INFO] [stderr] 7 |     s.ins(0, 'a');
[INFO] [stderr]   |       ^^^ expected 3 parameters
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 3 parameters but 2 parameters were supplied
[INFO] [stderr]  --> tests/tp2.rs:9:7
[INFO] [stderr]   |
[INFO] [stderr] 9 |     s.ins(1, 'b');
[INFO] [stderr]   |       ^^^ expected 3 parameters
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 3 parameters but 2 parameters were supplied
[INFO] [stderr]   --> tests/tp2.rs:11:7
[INFO] [stderr]    |
[INFO] [stderr] 11 |     s.ins(2, 'c');
[INFO] [stderr]    |       ^^^ expected 3 parameters
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 3 parameters but 2 parameters were supplied
[INFO] [stderr]   --> tests/tp2.rs:13:7
[INFO] [stderr]    |
[INFO] [stderr] 13 |     s.ins(3, 'd');
[INFO] [stderr]    |       ^^^ expected 3 parameters
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `clone` found for type `woot::WString<_, _>` in the current scope
[INFO] [stderr]   --> tests/tp2.rs:16:20
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut s1 = s.clone();
[INFO] [stderr]    |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `clone` found for type `woot::WString<_, _>` in the current scope
[INFO] [stderr]   --> tests/tp2.rs:17:20
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut s2 = s.clone();
[INFO] [stderr]    |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `clone` found for type `woot::WString<_, _>` in the current scope
[INFO] [stderr]   --> tests/tp2.rs:18:20
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut s3 = s.clone();
[INFO] [stderr]    |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0061, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0061`.
[INFO] [stderr] error: Could not compile `woot`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:243:24
[INFO] [stderr]     |
[INFO] [stderr] 243 |             .batching(|mut it| match (it.next(), it.peek()) {
[INFO] [stderr]     |                        ----^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b9562ea2065905a829d0e898124956edecab714f4632c60fc83ddc9081bd712a"`
[INFO] running `"docker" "rm" "-f" "b9562ea2065905a829d0e898124956edecab714f4632c60fc83ddc9081bd712a"`
[INFO] [stdout] b9562ea2065905a829d0e898124956edecab714f4632c60fc83ddc9081bd712a