[INFO] crate idcontain 0.7.5 is already in cache
[INFO] extracting crate idcontain 0.7.5 into work/ex/beta-1.37-6/sources/1.36.0/reg/idcontain/0.7.5
[INFO] extracting crate idcontain 0.7.5 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/idcontain/0.7.5
[INFO] validating manifest of idcontain-0.7.5 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of idcontain-0.7.5 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing idcontain-0.7.5
[INFO] finished frobbing idcontain-0.7.5
[INFO] frobbed toml for idcontain-0.7.5 written to work/ex/beta-1.37-6/sources/1.36.0/reg/idcontain/0.7.5/Cargo.toml
[INFO] started frobbing idcontain-0.7.5
[INFO] finished frobbing idcontain-0.7.5
[INFO] frobbed toml for idcontain-0.7.5 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/idcontain/0.7.5/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing idcontain-0.7.5 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/idcontain/0.7.5:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 2cc226a17abb147e9dce27cd0995e184bc77b379fe9da3f6b888fffc472c767c
[INFO] running `"docker" "start" "-a" "2cc226a17abb147e9dce27cd0995e184bc77b379fe9da3f6b888fffc472c767c"`
[INFO] [stderr]    Compiling idcontain v0.7.5 (/opt/crater/workdir)
[INFO] [stderr] warning[E0505]: cannot move out of `_` because it is borrowed
[INFO] [stderr]    --> src/slab.rs:457:13
[INFO] [stderr]     |
[INFO] [stderr] 451 |     fn get_mut_or_tagged_slot(&mut self, id: Id<T>) -> Result<&mut T, Option<&mut TaggedSlot<T>>> {
[INFO] [stderr]     |                               - let's call the lifetime of this reference `'1`
[INFO] [stderr] ...
[INFO] [stderr] 454 |                      slot: Slot::Occupied { ref mut value },
[INFO] [stderr]     |                                             ------------- borrow of value occurs here
[INFO] [stderr] 455 |                      tag,
[INFO] [stderr] 456 |                  }) if tag == id.tag => Ok(value),
[INFO] [stderr]     |                                         --------- returning this value requires that borrow lasts for `'1`
[INFO] [stderr] 457 |             tagged_slot => Err(tagged_slot),
[INFO] [stderr]     |             ^^^^^^^^^^^ move out of value occurs here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "2cc226a17abb147e9dce27cd0995e184bc77b379fe9da3f6b888fffc472c767c"`
[INFO] running `"docker" "rm" "-f" "2cc226a17abb147e9dce27cd0995e184bc77b379fe9da3f6b888fffc472c767c"`
[INFO] [stdout] 2cc226a17abb147e9dce27cd0995e184bc77b379fe9da3f6b888fffc472c767c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/idcontain/0.7.5:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 7f4ddf9f0bb870181ad2eee52211a6d578f933ed008f08b7faa9bcc9bcda3983
[INFO] running `"docker" "start" "-a" "7f4ddf9f0bb870181ad2eee52211a6d578f933ed008f08b7faa9bcc9bcda3983"`
[INFO] [stderr]    Compiling idcontain v0.7.5 (/opt/crater/workdir)
[INFO] [stderr] warning[E0505]: cannot move out of `_` because it is borrowed
[INFO] [stderr]    --> src/slab.rs:457:13
[INFO] [stderr]     |
[INFO] [stderr] 451 |     fn get_mut_or_tagged_slot(&mut self, id: Id<T>) -> Result<&mut T, Option<&mut TaggedSlot<T>>> {
[INFO] [stderr]     |                               - let's call the lifetime of this reference `'1`
[INFO] [stderr] ...
[INFO] [stderr] 454 |                      slot: Slot::Occupied { ref mut value },
[INFO] [stderr]     |                                             ------------- borrow of value occurs here
[INFO] [stderr] 455 |                      tag,
[INFO] [stderr] 456 |                  }) if tag == id.tag => Ok(value),
[INFO] [stderr]     |                                         --------- returning this value requires that borrow lasts for `'1`
[INFO] [stderr] 457 |             tagged_slot => Err(tagged_slot),
[INFO] [stderr]     |             ^^^^^^^^^^^ move out of value occurs here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.25s
[INFO] running `"docker" "inspect" "7f4ddf9f0bb870181ad2eee52211a6d578f933ed008f08b7faa9bcc9bcda3983"`
[INFO] running `"docker" "rm" "-f" "7f4ddf9f0bb870181ad2eee52211a6d578f933ed008f08b7faa9bcc9bcda3983"`
[INFO] [stdout] 7f4ddf9f0bb870181ad2eee52211a6d578f933ed008f08b7faa9bcc9bcda3983
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/idcontain/0.7.5:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 1e691da38d28bd7a7d30dfbeda669f17f0f748f5051f8a677a606c596e6fe4f3
[INFO] running `"docker" "start" "-a" "1e691da38d28bd7a7d30dfbeda669f17f0f748f5051f8a677a606c596e6fe4f3"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/idcontain-c0232c30a234d8c2
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test map::tests::modify_through_get_mut ... ok
[INFO] [stdout] test slab::tests::id_slab_insert_then_get_and_index ... ok
[INFO] [stdout] test slab::tests::id_slab_insert_then_remove_get ... ok
[INFO] [stdout] test map::tests::swap ... ok
[INFO] [stdout] test map::tests::insert_twice_returns_first_and_respects_tag ... ok
[INFO] [stdout] test map::tests::insert_remove_get ... ok
[INFO] [stdout] test slab::tests::id_slab_ids_from_different_id_slabs ... ok
[INFO] [stdout] test slab::tests::id_slab_insert_then_remove_iter ... ok
[INFO] [stdout] test map::tests::insert_get_returns_correct ... ok
[INFO] [stdout] test slab::tests::len_iter_contains_on_empty ... ok
[INFO] [stdout] test slab::tests::iter_mut_on_empty ... ok
[INFO] [stdout] test slab::tests::id_slab_insert_then_remove_index_mut_panics ... ok
[INFO] [stderr]    Doc-tests idcontain
[INFO] [stdout] test slab::tests::id_slab_insert_then_remove_index_panics ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test src/id.rs - id::Id<T>::cast (line 76) ... ok
[INFO] [stdout] test src/id.rs - id::Id<T>::invalid (line 53) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab (line 60) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::by_index_mut (line 497) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::contains (line 189) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::by_index (line 472) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab (line 20) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::get (line 220) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::index_to_id (line 525) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::get_mut (line 244) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::insert (line 271) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::len (line 139) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::iter_mut (line 419) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::is_empty (line 162) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::iter (line 386) ... ok
[INFO] [stdout] test src/slab.rs - slab::IdSlab<T>::remove (line 331) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "1e691da38d28bd7a7d30dfbeda669f17f0f748f5051f8a677a606c596e6fe4f3"`
[INFO] running `"docker" "rm" "-f" "1e691da38d28bd7a7d30dfbeda669f17f0f748f5051f8a677a606c596e6fe4f3"`
[INFO] [stdout] 1e691da38d28bd7a7d30dfbeda669f17f0f748f5051f8a677a606c596e6fe4f3