[INFO] crate rbtree 0.1.5 is already in cache
[INFO] extracting crate rbtree 0.1.5 into work/ex/beta-1.38-1/sources/1.37.0/reg/rbtree/0.1.5
[INFO] extracting crate rbtree 0.1.5 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rbtree/0.1.5
[INFO] validating manifest of rbtree-0.1.5 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 rbtree-0.1.5 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 rbtree-0.1.5
[INFO] finished frobbing rbtree-0.1.5
[INFO] frobbed toml for rbtree-0.1.5 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rbtree/0.1.5/Cargo.toml
[INFO] started frobbing rbtree-0.1.5
[INFO] finished frobbing rbtree-0.1.5
[INFO] frobbed toml for rbtree-0.1.5 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rbtree/0.1.5/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing rbtree-0.1.5 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/rbtree/0.1.5:/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] 50c336a1af978a90a849cc03854a1ff8e7b7c7b26e918b1a84059f806be78386
[INFO] running `"docker" "start" "-a" "50c336a1af978a90a849cc03854a1ff8e7b7c7b26e918b1a84059f806be78386"`
[INFO] [stderr]    Compiling rbtree v0.1.5 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `super::RBTree`
[INFO] [stderr]     --> src/lib.rs:1404:9
[INFO] [stderr]      |
[INFO] [stderr] 1404 |     use super::RBTree;
[INFO] [stderr]      |         ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `"docker" "inspect" "50c336a1af978a90a849cc03854a1ff8e7b7c7b26e918b1a84059f806be78386"`
[INFO] running `"docker" "rm" "-f" "50c336a1af978a90a849cc03854a1ff8e7b7c7b26e918b1a84059f806be78386"`
[INFO] [stdout] 50c336a1af978a90a849cc03854a1ff8e7b7c7b26e918b1a84059f806be78386
[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/rbtree/0.1.5:/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] 47d1f58b17cf86a6a5b83211130da855ece40624afae8c75bb8033e8399fe2d4
[INFO] running `"docker" "start" "-a" "47d1f58b17cf86a6a5b83211130da855ece40624afae8c75bb8033e8399fe2d4"`
[INFO] [stderr]    Compiling rbtree v0.1.5 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `"docker" "inspect" "47d1f58b17cf86a6a5b83211130da855ece40624afae8c75bb8033e8399fe2d4"`
[INFO] running `"docker" "rm" "-f" "47d1f58b17cf86a6a5b83211130da855ece40624afae8c75bb8033e8399fe2d4"`
[INFO] [stdout] 47d1f58b17cf86a6a5b83211130da855ece40624afae8c75bb8033e8399fe2d4
[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/rbtree/0.1.5:/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"`
[INFO] [stdout] a3da6ca5cb0664b6c3fbf5a14a6630445aac3031644ad16ad4f9453a3bb80edb
[INFO] running `"docker" "start" "-a" "a3da6ca5cb0664b6c3fbf5a14a6630445aac3031644ad16ad4f9453a3bb80edb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rbtree-5b6d4672182d6a07
[INFO] [stdout] 
[INFO] [stdout] running 25 tests
[INFO] [stdout] test tests::test_from_iter ... ok
[INFO] [stdout] test tests::test_find_mut ... ok
[INFO] [stdout] test tests::test_extend_iter ... ok
[INFO] [stdout] test tests::test_eq ... ok
[INFO] [stdout] test tests::test_empty_remove ... ok
[INFO] [stdout] test tests::test_empty_iter ... ok
[INFO] [stdout] test tests::test_clone ... ok
[INFO] [stdout] test tests::test_find ... ok
[INFO] [stdout] test tests::test_insert ... ok
[INFO] [stdout] test tests::test_iter_len ... ok
[INFO] [stdout] test tests::test_index ... ok
[INFO] [stdout] test tests::test_is_empty ... ok
[INFO] [stdout] test tests::test_iterate ... ok
[INFO] [stdout] test tests::test_keys ... ok
[INFO] [stdout] test tests::test_iter_mut_len ... ok
[INFO] [stdout] test tests::test_mut_size_hint ... ok
[INFO] [stdout] test tests::test_pop ... ok
[INFO] [stdout] test tests::test_remove ... ok
[INFO] [stdout] test tests::test_show ... ok
[INFO] [stdout] test tests::test_replace ... ok
[INFO] [stdout] test tests::test_size_hint ... ok
[INFO] [stdout] test tests::test_values ... ok
[INFO] [stdout] test tests::test_values_mut ... ok
[INFO] [stdout] test tests::test_index_nonexistent ... ok
[INFO] [stdout] test tests::test_lots_of_insertions ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 25 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rbtree
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/lib.rs - RBTree (line 323) ... ok
[INFO] [stdout] test src/lib.rs - RBTree<K, V>::replace_or_insert (line 921) ... ok
[INFO] [stdout] test src/lib.rs - RBTree (line 282) ... ok
[INFO] [stdout] test src/lib.rs - IterMut (line 729) ... ok
[INFO] [stdout] test src/lib.rs - ValuesMut (line 547) ... ok
[INFO] [stdout] test src/lib.rs - Values (line 503) ... ok
[INFO] [stdout] test src/lib.rs - Keys (line 461) ... ok
[INFO] [stdout] test src/lib.rs - Iter (line 653) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "a3da6ca5cb0664b6c3fbf5a14a6630445aac3031644ad16ad4f9453a3bb80edb"`
[INFO] running `"docker" "rm" "-f" "a3da6ca5cb0664b6c3fbf5a14a6630445aac3031644ad16ad4f9453a3bb80edb"`
[INFO] [stdout] a3da6ca5cb0664b6c3fbf5a14a6630445aac3031644ad16ad4f9453a3bb80edb