[INFO] crate stitches 0.1.0 is already in cache
[INFO] extracting crate stitches 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/stitches/0.1.0
[INFO] extracting crate stitches 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/stitches/0.1.0
[INFO] validating manifest of stitches-0.1.0 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 stitches-0.1.0 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 stitches-0.1.0
[INFO] finished frobbing stitches-0.1.0
[INFO] frobbed toml for stitches-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/stitches/0.1.0/Cargo.toml
[INFO] started frobbing stitches-0.1.0
[INFO] finished frobbing stitches-0.1.0
[INFO] frobbed toml for stitches-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/stitches/0.1.0/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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing stitches-0.1.0 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-2/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/stitches/0.1.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 323e245209c26ace57d6db1bc70ea4bb86ba34d2c4289c533a6031ca7b34bc54
[INFO] running `"docker" "start" "-a" "323e245209c26ace57d6db1bc70ea4bb86ba34d2c4289c533a6031ca7b34bc54"`
[INFO] [stderr]    Compiling stitches v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/tree_search.rs:7:30
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn initial(&self) -> Box<Iterator<Item = Self::Candidate>>;
[INFO] [stderr]   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Self::Candidate>`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/tree_search.rs:9:67
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn following<'s>(&'s self, candidate: Self::Candidate) -> Box<Iterator<Item = Self::Candidate> + 's>;
[INFO] [stderr]   |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Self::Candidate> + 's`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `outer_len`
[INFO] [stderr]   --> src/fast_deque.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn outer_len(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]   --> src/fast_deque.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/fast_deque.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn get(&self, mut index: usize) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_head`
[INFO] [stderr]   --> src/fast_deque.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn peek_head(&self) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iter`
[INFO] [stderr]   --> src/fast_deque.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn iter(&self) -> impl Iterator<Item = &T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "323e245209c26ace57d6db1bc70ea4bb86ba34d2c4289c533a6031ca7b34bc54"`
[INFO] running `"docker" "rm" "-f" "323e245209c26ace57d6db1bc70ea4bb86ba34d2c4289c533a6031ca7b34bc54"`
[INFO] [stdout] 323e245209c26ace57d6db1bc70ea4bb86ba34d2c4289c533a6031ca7b34bc54
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/stitches/0.1.0:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] b4eed894b8f7cd82e6939b037bd779989c8b13aa86cb93b89ccd3e9c84cf0d56
[INFO] running `"docker" "start" "-a" "b4eed894b8f7cd82e6939b037bd779989c8b13aa86cb93b89ccd3e9c84cf0d56"`
[INFO] [stderr]    Compiling stitches v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/tree_search.rs:7:30
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn initial(&self) -> Box<Iterator<Item = Self::Candidate>>;
[INFO] [stderr]   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Self::Candidate>`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/tree_search.rs:9:67
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn following<'s>(&'s self, candidate: Self::Candidate) -> Box<Iterator<Item = Self::Candidate> + 's>;
[INFO] [stderr]   |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Self::Candidate> + 's`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `outer_len`
[INFO] [stderr]   --> src/fast_deque.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn outer_len(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]   --> src/fast_deque.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/fast_deque.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn get(&self, mut index: usize) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_head`
[INFO] [stderr]   --> src/fast_deque.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn peek_head(&self) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iter`
[INFO] [stderr]   --> src/fast_deque.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn iter(&self) -> impl Iterator<Item = &T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "b4eed894b8f7cd82e6939b037bd779989c8b13aa86cb93b89ccd3e9c84cf0d56"`
[INFO] running `"docker" "rm" "-f" "b4eed894b8f7cd82e6939b037bd779989c8b13aa86cb93b89ccd3e9c84cf0d56"`
[INFO] [stdout] b4eed894b8f7cd82e6939b037bd779989c8b13aa86cb93b89ccd3e9c84cf0d56
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/stitches/0.1.0:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] f2e45cd868def7fbb720e545ff72954658bc1fc60b070b5ac49bf5e097afc4c2
[INFO] running `"docker" "start" "-a" "f2e45cd868def7fbb720e545ff72954658bc1fc60b070b5ac49bf5e097afc4c2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/stitches-e024cbd4ee7c34e7
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stitches
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f2e45cd868def7fbb720e545ff72954658bc1fc60b070b5ac49bf5e097afc4c2"`
[INFO] running `"docker" "rm" "-f" "f2e45cd868def7fbb720e545ff72954658bc1fc60b070b5ac49bf5e097afc4c2"`
[INFO] [stdout] f2e45cd868def7fbb720e545ff72954658bc1fc60b070b5ac49bf5e097afc4c2