[INFO] fetching crate btreemultimap 0.1.0...
[INFO] testing btreemultimap-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate btreemultimap 0.1.0 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate btreemultimap 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate btreemultimap 0.1.0
[INFO] finished tweaking crates.io crate btreemultimap 0.1.0
[INFO] tweaked toml for crates.io crate btreemultimap 0.1.0 written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 71e3072a17c02dad669d0b6be8f7c2b64368c962eeb788b73f9c113bffe76fa8
[INFO] running `Command { std: "docker" "start" "-a" "71e3072a17c02dad669d0b6be8f7c2b64368c962eeb788b73f9c113bffe76fa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71e3072a17c02dad669d0b6be8f7c2b64368c962eeb788b73f9c113bffe76fa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71e3072a17c02dad669d0b6be8f7c2b64368c962eeb788b73f9c113bffe76fa8", kill_on_drop: false }`
[INFO] [stdout] 71e3072a17c02dad669d0b6be8f7c2b64368c962eeb788b73f9c113bffe76fa8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f88fcd448c82afd55409fb632884f167fe77e0223304975aec9daf3222017ce
[INFO] running `Command { std: "docker" "start" "-a" "4f88fcd448c82afd55409fb632884f167fe77e0223304975aec9daf3222017ce", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling btreemultimap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.06s
[INFO] running `Command { std: "docker" "inspect" "4f88fcd448c82afd55409fb632884f167fe77e0223304975aec9daf3222017ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f88fcd448c82afd55409fb632884f167fe77e0223304975aec9daf3222017ce", kill_on_drop: false }`
[INFO] [stdout] 4f88fcd448c82afd55409fb632884f167fe77e0223304975aec9daf3222017ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d2b00b476d4c11e6a74f53fddcf3ebfec4d751bab086bcf3431e081ef8297ee
[INFO] running `Command { std: "docker" "start" "-a" "0d2b00b476d4c11e6a74f53fddcf3ebfec4d751bab086bcf3431e081ef8297ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_test v1.0.130
[INFO] [stderr]    Compiling btreemultimap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1170:9
[INFO] [stdout]      |
[INFO] [stdout] 1170 |         &m[&1];
[INFO] [stdout]      |         ^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.06s
[INFO] running `Command { std: "docker" "inspect" "0d2b00b476d4c11e6a74f53fddcf3ebfec4d751bab086bcf3431e081ef8297ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d2b00b476d4c11e6a74f53fddcf3ebfec4d751bab086bcf3431e081ef8297ee", kill_on_drop: false }`
[INFO] [stdout] 0d2b00b476d4c11e6a74f53fddcf3ebfec4d751bab086bcf3431e081ef8297ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6d20b79d0fa7121a689733bd39d86668d9eec29cdc5965ac0439ec15a83c517a
[INFO] running `Command { std: "docker" "start" "-a" "6d20b79d0fa7121a689733bd39d86668d9eec29cdc5965ac0439ec15a83c517a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]     --> src/lib.rs:1170:9
[INFO] [stderr]      |
[INFO] [stderr] 1170 |         &m[&1];
[INFO] [stderr]      |         ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `btreemultimap` (lib test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.47s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/btreemultimap-21137d97d35d2d00)
[INFO] [stdout] 
[INFO] [stdout] running 45 tests
[INFO] [stdout] test serde::tests::test_empty ... ok
[INFO] [stdout] test tests::clear ... ok
[INFO] [stdout] test serde::tests::test_single ... ok
[INFO] [stdout] test tests::contains_key_false ... ok
[INFO] [stdout] test tests::contains_key_true ... ok
[INFO] [stdout] test serde::tests::test_multiple ... ok
[INFO] [stdout] test tests::get_not_present ... ok
[INFO] [stdout] test tests::get_present ... ok
[INFO] [stdout] test tests::get_vec_not_present ... ok
[INFO] [stdout] test tests::create ... ok
[INFO] [stdout] test tests::intoiterator_for_reference_type ... ok
[INFO] [stdout] test tests::insert_existing ... ok
[INFO] [stdout] test tests::insert_many ... ok
[INFO] [stdout] test tests::insert_many_again ... ok
[INFO] [stdout] test tests::get_mut ... ok
[INFO] [stdout] test tests::get_vec_present ... ok
[INFO] [stdout] test tests::index ... ok
[INFO] [stdout] test tests::insert_many_from_slice_again ... ok
[INFO] [stdout] test tests::insert_many_from_slice ... ok
[INFO] [stdout] test tests::intoiterator_consuming ... ok
[INFO] [stdout] test tests::insert ... ok
[INFO] [stdout] test tests::get_vec_mut ... ok
[INFO] [stdout] test tests::intoiterator_for_mutable_reference_type ... ok
[INFO] [stdout] test tests::is_empty_false ... ok
[INFO] [stdout] test tests::is_empty_true ... ok
[INFO] [stdout] test tests::iter ... ok
[INFO] [stdout] test tests::keys ... ok
[INFO] [stdout] test tests::retain_also_removes_empty_vector ... ok
[INFO] [stdout] test tests::new ... ok
[INFO] [stdout] test tests::len ... ok
[INFO] [stdout] test tests::remove_present ... ok
[INFO] [stdout] test tests::remove_not_present ... ok
[INFO] [stdout] test tests::test_entry ... ok
[INFO] [stdout] test tests::test_entry_vec ... ok
[INFO] [stdout] test tests::test_extend_consuming_btree_hashmap ... ok
[INFO] [stdout] test tests::test_extend_consuming_multimap ... ok
[INFO] [stdout] test tests::test_default ... ok
[INFO] [stdout] test tests::test_macro ... ok
[INFO] [stdout] test tests::test_is_vec ... ok
[INFO] [stdout] test tests::test_eq ... ok
[INFO] [stdout] test tests::test_extend_ref_btreemap ... ok
[INFO] [stdout] test tests::retain_removes_element ... ok
[INFO] [stdout] test tests::test_extend_ref_multimap ... ok
[INFO] [stdout] test tests::test_from_iterator ... ok
[INFO] [stderr]    Doc-tests btreemultimap
[INFO] [stdout] test tests::index_no_entry - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 45 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 24 tests
[INFO] [stdout] test src/lib.rs - btreemultimap (line 1076) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::contains_key (line 190) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::is_vec (line 373) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::iter (line 455) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::clear (line 416) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::remove (line 230) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::get (line 254) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::new (line 94) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::entry (line 511) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::get_mut (line 277) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::insert_many (line 138) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::get_vec_mut (line 347) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::len (line 209) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::range (line 590) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::is_empty (line 399) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::iter_mut (line 481) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::retain (line 547) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::range_mut (line 637) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::get_vec (line 302) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::insert (line 113) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::keys (line 433) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::insert_many_from_slice (line 163) ... ok
[INFO] [stdout] test src/lib.rs - BTreeMultiMap<K, V>::get_key_values (line 324) ... ok
[INFO] [stdout] test src/lib.rs - (line 21) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 24 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.06s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6d20b79d0fa7121a689733bd39d86668d9eec29cdc5965ac0439ec15a83c517a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d20b79d0fa7121a689733bd39d86668d9eec29cdc5965ac0439ec15a83c517a", kill_on_drop: false }`
[INFO] [stdout] 6d20b79d0fa7121a689733bd39d86668d9eec29cdc5965ac0439ec15a83c517a