[INFO] fetching crate pui-arena 0.5.1...
[INFO] testing pui-arena-0.5.1 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate pui-arena 0.5.1 into /workspace/builds/worker-50/source
[INFO] validating manifest of crates.io crate pui-arena 0.5.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pui-arena 0.5.1
[INFO] finished tweaking crates.io crate pui-arena 0.5.1
[INFO] tweaked toml for crates.io crate pui-arena 0.5.1 written to /workspace/builds/worker-50/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pui-vec v0.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6398394045a159aa8cbb62532b9d0e29ae601605a81f3140d2216de670658de5
[INFO] running `Command { std: "docker" "start" "-a" "6398394045a159aa8cbb62532b9d0e29ae601605a81f3140d2216de670658de5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6398394045a159aa8cbb62532b9d0e29ae601605a81f3140d2216de670658de5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6398394045a159aa8cbb62532b9d0e29ae601605a81f3140d2216de670658de5", kill_on_drop: false }`
[INFO] [stdout] 6398394045a159aa8cbb62532b9d0e29ae601605a81f3140d2216de670658de5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ceb51426fbc7ea9d4b0170de9b21a1c9025c49a948a5e5216785f60a28495a93
[INFO] running `Command { std: "docker" "start" "-a" "ceb51426fbc7ea9d4b0170de9b21a1c9025c49a948a5e5216785f60a28495a93", kill_on_drop: false }`
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling pui-core v0.5.2
[INFO] [stderr]    Compiling pui-vec v0.5.1
[INFO] [stderr]    Compiling pui-arena v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.79s
[INFO] running `Command { std: "docker" "inspect" "ceb51426fbc7ea9d4b0170de9b21a1c9025c49a948a5e5216785f60a28495a93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ceb51426fbc7ea9d4b0170de9b21a1c9025c49a948a5e5216785f60a28495a93", kill_on_drop: false }`
[INFO] [stdout] ceb51426fbc7ea9d4b0170de9b21a1c9025c49a948a5e5216785f60a28495a93
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b42fb57ed8d7740cb42b4cde1acf196cf2dc0372e35abe907caa6192b7b8aa9
[INFO] running `Command { std: "docker" "start" "-a" "1b42fb57ed8d7740cb42b4cde1acf196cf2dc0372e35abe907caa6192b7b8aa9", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling plotters-backend v0.3.2
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling plotters-svg v0.3.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling criterion-plot v0.4.4
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.3.5
[INFO] [stderr]    Compiling pui-arena v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 37.48s
[INFO] running `Command { std: "docker" "inspect" "1b42fb57ed8d7740cb42b4cde1acf196cf2dc0372e35abe907caa6192b7b8aa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b42fb57ed8d7740cb42b4cde1acf196cf2dc0372e35abe907caa6192b7b8aa9", kill_on_drop: false }`
[INFO] [stdout] 1b42fb57ed8d7740cb42b4cde1acf196cf2dc0372e35abe907caa6192b7b8aa9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5f7bbc78b2f9195a94bc5e3af6264497d02ce45da017805b6f144aef1001406f
[INFO] running `Command { std: "docker" "start" "-a" "5f7bbc78b2f9195a94bc5e3af6264497d02ce45da017805b6f144aef1001406f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.87s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/pui_arena-f2f24fbb9002a326)
[INFO] [stdout] 
[INFO] [stdout] running 72 tests
[INFO] [stdout] test base::dense::test::basic ... ok
[INFO] [stdout] test base::dense::test::basic_reinsertion ... ok
[INFO] [stdout] test base::dense::test::into_iter_values_insert_only ... ok
[INFO] [stdout] test base::dense::test::into_iter_values_rev_insert_only ... ok
[INFO] [stdout] test base::dense::test::iter_keys_insert_only ... ok
[INFO] [stdout] test base::dense::test::into_iter_values_rev_with_removal ... ok
[INFO] [stdout] test base::dense::test::iter_keys_rev_insert_only ... ok
[INFO] [stdout] test base::dense::test::basic_retain ... ok
[INFO] [stdout] test base::dense::test::iter_values_mut_insert_only ... ok
[INFO] [stdout] test base::dense::test::iter_values_insert_only ... ok
[INFO] [stdout] test base::dense::test::iter_values_with_removal ... ok
[INFO] [stdout] test base::dense::test::iter_keys_with_reinsertion ... ok
[INFO] [stdout] test base::dense::test::zero_sized ... ok
[INFO] [stdout] test base::dense::test::into_iter_values_with_reinsertion ... ok
[INFO] [stdout] test base::dense::test::iter_keys_rev_with_removal ... ok
[INFO] [stdout] test base::hop::test::basic_reinsertion ... ok
[INFO] [stdout] test base::dense::test::iter_values_with_reinsertion ... ok
[INFO] [stdout] test base::dense::test::into_iter_values_with_removal ... ok
[INFO] [stdout] test base::hop::test::into_iter_values_rev_insert_only ... ok
[INFO] [stdout] test base::hop::test::into_iter_values_with_reinsertion ... ok
[INFO] [stdout] test base::dense::test::iter_values_mut_rev_insert_only ... ok
[INFO] [stdout] test base::dense::test::iter_values_mut_with_reinsertion ... ok
[INFO] [stdout] test base::hop::test::iter_keys_insert_only ... ok
[INFO] [stdout] test base::hop::test::iter_keys_rev_insert_only ... ok
[INFO] [stdout] test base::hop::test::iter_keys_with_reinsertion ... ok
[INFO] [stdout] test base::hop::test::iter_keys_rev_with_removal ... ok
[INFO] [stdout] test base::hop::test::iter_values_insert_only ... ok
[INFO] [stdout] test base::hop::test::iter_values_mut_insert_only ... ok
[INFO] [stdout] test base::hop::test::iter_values_mut_rev_with_removal ... ok
[INFO] [stdout] test base::hop::test::iter_values_mut_with_reinsertion ... ok
[INFO] [stdout] test base::hop::test::iter_values_mut_with_removal ... ok
[INFO] [stdout] test base::hop::test::iter_values_with_removal ... ok
[INFO] [stdout] test base::sparse::test::basic ... ok
[INFO] [stdout] test base::hop::test::into_iter_values_rev_with_removal ... ok
[INFO] [stdout] test base::hop::test::iter_values_rev_insert_only ... ok
[INFO] [stdout] test base::dense::test::iter_keys_with_removal ... ok
[INFO] [stdout] test base::dense::test::iter_values_rev_insert_only ... ok
[INFO] [stdout] test base::hop::test::into_iter_values_insert_only ... ok
[INFO] [stdout] test base::hop::test::iter_values_rev_with_removal ... ok
[INFO] [stdout] test base::hop::test::iter_values_with_reinsertion ... ok
[INFO] [stdout] test base::hop::test::iter_values_mut_rev_insert_only ... ok
[INFO] [stdout] test base::hop::test::zero_sized ... ok
[INFO] [stdout] test base::dense::test::iter_values_mut_rev_with_removal ... ok
[INFO] [stdout] test base::hop::test::iter_keys_with_removal ... ok
[INFO] [stdout] test base::hop::test::basic ... ok
[INFO] [stdout] test base::hop::test::into_iter_values_with_removal ... ok
[INFO] [stdout] test base::dense::test::iter_values_rev_with_removal ... ok
[INFO] [stdout] test base::dense::test::iter_values_mut_with_removal ... ok
[INFO] [stdout] test base::sparse::test::into_iter_values_insert_only ... ok
[INFO] [stdout] test base::sparse::test::iter_keys_rev_insert_only ... ok
[INFO] [stdout] test base::sparse::test::iter_keys_insert_only ... ok
[INFO] [stdout] test base::sparse::test::iter_keys_with_reinsertion ... ok
[INFO] [stdout] test base::sparse::test::iter_values_mut_with_reinsertion ... ok
[INFO] [stdout] test base::sparse::test::basic_retain ... ok
[INFO] [stdout] test base::hop::test::basic_retain ... ok
[INFO] [stdout] test base::sparse::test::iter_values_mut_insert_only ... ok
[INFO] [stdout] test base::sparse::test::iter_values_mut_with_removal ... ok
[INFO] [stdout] test base::sparse::test::iter_values_insert_only ... ok
[INFO] [stdout] test base::sparse::test::iter_values_rev_with_removal ... ok
[INFO] [stdout] test base::sparse::test::iter_values_mut_rev_with_removal ... ok
[INFO] [stdout] test base::sparse::test::iter_values_with_reinsertion ... ok
[INFO] [stdout] test base::sparse::test::iter_keys_with_removal ... ok
[INFO] [stdout] test base::sparse::test::basic_reinsertion ... ok
[INFO] [stdout] test base::sparse::test::into_iter_values_rev_with_removal ... ok
[INFO] [stdout] test base::sparse::test::iter_values_mut_rev_insert_only ... ok
[INFO] [stdout] test base::sparse::test::into_iter_values_with_reinsertion ... ok
[INFO] [stdout] test base::sparse::test::into_iter_values_with_removal ... ok
[INFO] [stdout] test base::sparse::test::iter_keys_rev_with_removal ... ok
[INFO] [stdout] test base::sparse::test::into_iter_values_rev_insert_only ... ok
[INFO] [stdout] test base::sparse::test::iter_values_rev_insert_only ... ok
[INFO] [stdout] test base::sparse::test::zero_sized ... ok
[INFO] [stdout] test base::sparse::test::iter_values_with_removal ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 72 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.08s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/hop.rs (/opt/rustwide/target/debug/deps/hop-85633c2a829ff59d)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running tests/sparse.rs (/opt/rustwide/target/debug/deps/sparse-70832f92a2b69db5)
[INFO] [stdout] test hop_version_exhaustion ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests pui-arena
[INFO] [stdout] test sparse_version_exhaustion ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - (line 146) ... ignored
[INFO] [stdout] test src/lib.rs - (line 132) ... FAILED
[INFO] [stdout] test src/version.rs - version::Version (line 22) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 132) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: could not find `MyCustomArena` in the crate root
[INFO] [stdout]  --> src/lib.rs:136:12
[INFO] [stdout]   |
[INFO] [stdout] 7 |     struct MyCustomArena;
[INFO] [stdout]   |            ^^^^^^^^^^^^^ could not find `MyCustomArena` in the crate root
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `MyCustomArena` in module `super`
[INFO] [stdout]  --> src/lib.rs:136:12
[INFO] [stdout]   |
[INFO] [stdout] 7 |     struct MyCustomArena;
[INFO] [stdout]   |            ^^^^^^^^^^^^^ not found in `super`
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Key` in module `key`
[INFO] [stdout]    --> src/lib.rs:135:1
[INFO] [stdout]     |
[INFO] [stdout] 6   | / pui_arena::newtype! {
[INFO] [stdout] 7   | |     struct MyCustomArena;
[INFO] [stdout] 8   | | }
[INFO] [stdout]     | |_^ help: a struct with a similar name exists: `Keys`
[INFO] [stdout]     | 
[INFO] [stdout]    ::: /opt/rustwide/workdir/src/base/sparse.rs:637:1
[INFO] [stdout]     |
[INFO] [stdout] 637 |   pub struct Keys<'a, T, I, V: Version, K> {
[INFO] [stdout]     |   ---------------------------------------- similarly named struct `Keys` defined here
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider importing this struct:
[INFO] [stdout]             pui_arena::Key
[INFO] [stdout]     = note: this error originates in the macro `$crate::__newtype` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Key` in module `key`
[INFO] [stdout]    --> src/lib.rs:135:1
[INFO] [stdout]     |
[INFO] [stdout] 6   | / pui_arena::newtype! {
[INFO] [stdout] 7   | |     struct MyCustomArena;
[INFO] [stdout] 8   | | }
[INFO] [stdout]     | |_^ help: a struct with a similar name exists: `Keys`
[INFO] [stdout]     | 
[INFO] [stdout]    ::: /opt/rustwide/workdir/src/base/hop.rs:445:1
[INFO] [stdout]     |
[INFO] [stdout] 445 |   pub struct Keys<'a, T, I, V: Version, K> {
[INFO] [stdout]     |   ---------------------------------------- similarly named struct `Keys` defined here
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider importing this struct:
[INFO] [stdout]             pui_arena::Key
[INFO] [stdout]     = note: this error originates in the macro `$crate::__newtype` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Key` in module `key`
[INFO] [stdout]    --> src/lib.rs:135:1
[INFO] [stdout]     |
[INFO] [stdout] 6   | / pui_arena::newtype! {
[INFO] [stdout] 7   | |     struct MyCustomArena;
[INFO] [stdout] 8   | | }
[INFO] [stdout]     | |_^ help: a struct with a similar name exists: `Keys`
[INFO] [stdout]     | 
[INFO] [stdout]    ::: /opt/rustwide/workdir/src/base/sparse.rs:637:1
[INFO] [stdout]     |
[INFO] [stdout] 637 |   pub struct Keys<'a, T, I, V: Version, K> {
[INFO] [stdout]     |   ---------------------------------------- similarly named struct `Keys` defined here
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider importing this struct:
[INFO] [stdout]             pui_arena::Key
[INFO] [stdout]     = note: this error originates in the macro `$crate::__newtype` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed for `_doctest_main_src_lib_rs_132_0::sparse::Arena<T>`
[INFO] [stdout]   --> src/lib.rs:139:23
[INFO] [stdout]    |
[INFO] [stdout] 10 | let my_sparse_arena = sparse::Arena::new();
[INFO] [stdout]    |     ---------------   ^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `T`
[INFO] [stdout]    |     |
[INFO] [stdout]    |     consider giving `my_sparse_arena` the explicit type `_doctest_main_src_lib_rs_132_0::sparse::Arena<T>`, where the type parameter `T` is specified
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0412, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 132)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.90s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "5f7bbc78b2f9195a94bc5e3af6264497d02ce45da017805b6f144aef1001406f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f7bbc78b2f9195a94bc5e3af6264497d02ce45da017805b6f144aef1001406f", kill_on_drop: false }`
[INFO] [stdout] 5f7bbc78b2f9195a94bc5e3af6264497d02ce45da017805b6f144aef1001406f
