[INFO] cloning repository https://github.com/WanderLanz/Lender
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/WanderLanz/Lender" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWanderLanz%2FLender", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWanderLanz%2FLender'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b8545c5e4bc0611e8784177dcb57f5823270527b
[INFO] testing WanderLanz/Lender against 1.99.0-beta.1 for beta-1.99-5
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWanderLanz%2FLender" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/WanderLanz/Lender
[INFO] finished tweaking git repo https://github.com/WanderLanz/Lender
[INFO] tweaked toml for git repo https://github.com/WanderLanz/Lender written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/WanderLanz/Lender on toolchain 1.99.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 31 packages to highest Rust 1.85 compatible versions
[INFO] [stderr]       Adding maybe-dangling v0.1.2 (available: v0.2.0, requires Rust 1.96.0)
[INFO] [stderr]       Adding syn v2.0.119 (available: v3.0.4)
[INFO] [stderr]       Adding trybuild v1.0.119 (available: v1.0.120, requires Rust 1.88)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8
[INFO] running `Command { std: "docker" "start" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.107
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling quote v1.0.47
[INFO] [stderr]    Compiling fallible-iterator v0.3.0
[INFO] [stderr]    Compiling aliasable v0.1.3
[INFO] [stderr]    Compiling stable_try_trait_v2 v1.75.1 (/opt/rustwide/workdir/stable_try_trait_v2)
[INFO] [stderr]    Compiling maybe-dangling v0.1.2
[INFO] [stderr]    Compiling syn v2.0.119
[INFO] [stderr]    Compiling lender-derive v0.1.4 (/opt/rustwide/workdir/lender-derive)
[INFO] [stderr]    Compiling lender v0.8.1 (/opt/rustwide/workdir/lender)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.63s
[INFO] running `Command { std: "docker" "inspect" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.229
[INFO] [stderr]    Compiling zmij v1.0.23
[INFO] [stderr]    Compiling target-triple v1.0.1
[INFO] [stderr]    Compiling winnow v1.0.4
[INFO] [stderr]    Compiling serde_json v1.0.151
[INFO] [stderr]    Compiling serde v1.0.229
[INFO] [stderr]    Compiling memchr v2.8.3
[INFO] [stderr]    Compiling lender-derive v0.1.4 (/opt/rustwide/workdir/lender-derive)
[INFO] [stderr]    Compiling syn v3.0.4
[INFO] [stderr]    Compiling toml_writer v1.1.2+spec-1.1.0
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling glob v0.3.4
[INFO] [stderr]    Compiling lender v0.8.1 (/opt/rustwide/workdir/lender)
[INFO] [stderr]    Compiling stable_try_trait_v2 v1.75.1 (/opt/rustwide/workdir/stable_try_trait_v2)
[INFO] [stderr]    Compiling toml_parser v1.1.3+spec-1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.229
[INFO] [stderr]    Compiling toml_datetime v1.1.1+spec-1.1.0
[INFO] [stderr]    Compiling serde_spanned v1.1.1
[INFO] [stderr]    Compiling toml v1.1.4+spec-1.1.0
[INFO] [stderr]    Compiling trybuild v1.0.119
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 25.55s
[INFO] running `Command { std: "docker" "inspect" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/lender-45ac272bbb4c65e8)
[INFO] [stdout] 
[INFO] [stdout] running 34 tests
[INFO] [stdout] test adapters::chunky::test::test_nth_exhaust_no_overflow_panic ... ok
[INFO] [stdout] test adapters::flatten::test::test_flatten ... ok
[INFO] [stdout] test adapters::fuse::test::test_last_fuses ... ok
[INFO] [stdout] test adapters::flatten::test::test_flatmap_empty ... ok
[INFO] [stdout] test adapters::peekable::test::test_peekable ... ok
[INFO] [stdout] test adapters::take::test::test_advance_back_by_zero_is_noop ... ok
[INFO] [stdout] test adapters::step_by::test::test_nth_fresh ... ok
[INFO] [stdout] test adapters::peekable::test::test_into_inner_and_count_after_peek ... ok
[INFO] [stdout] test adapters::take::test::test_empty_take_nth_back_leaves_inner ... ok
[INFO] [stdout] test adapters::take_while::test::test_none_is_terminal ... ok
[INFO] [stdout] test fallible_adapters::chunky::test::test_nth_exhaust_no_overflow_panic ... ok
[INFO] [stdout] test fallible_adapters::flatten::test::test_flat_map_empty ... ok
[INFO] [stdout] test fallible_adapters::flatten::test::test_flat_map_into_inner_and_parts ... ok
[INFO] [stdout] test fallible_adapters::flatten::test::test_flatten ... ok
[INFO] [stdout] test fallible_adapters::flatten::test::test_flatten_into_inner ... ok
[INFO] [stdout] test fallible_adapters::fuse::test::test_last_fuses ... ok
[INFO] [stdout] test fallible_adapters::peekable::test::test_into_inner_and_count_after_peek ... ok
[INFO] [stdout] test fallible_adapters::peekable::test::test_peekable ... ok
[INFO] [stdout] test fallible_adapters::step_by::test::test_nth_fresh ... ok
[INFO] [stdout] test fallible_adapters::take::test::test_advance_back_by_zero_is_noop ... ok
[INFO] [stdout] test fallible_adapters::take::test::test_empty_take_nth_back_leaves_inner ... ok
[INFO] [stdout] test fallible_adapters::take_while::test::test_none_is_terminal ... ok
[INFO] [stdout] test fallible_sources::from_iter_ref::test::test_drops_previous_item_before_fetch ... ok
[INFO] [stdout] test sources::from_iter_ref::test::test_drops_previous_item_before_fetch ... ok
[INFO] [stdout] test sources::windows_mut::test_array_windows_mut ... ok
[INFO] [stdout] test sources::windows_mut::test_array_windows_mut_exact_size ... ok
[INFO] [stdout] test sources::windows_mut::test_array_windows_mut_mixed ... ok
[INFO] [stdout] test sources::windows_mut::test_array_windows_mut_rev ... ok
[INFO] [stdout] test sources::windows_mut::test_windows_mut ... ok
[INFO] [stdout] test sources::windows_mut::test_windows_mut_back ... ok
[INFO] [stdout] test sources::windows_mut::test_windows_mut_exact_size_mixed ... ok
[INFO] [stdout] test sources::windows_mut::test_windows_mut_exact_size ... ok
[INFO] [stdout] test sources::windows_mut::test_windows_mut_rev ... ok
[INFO] [stdout] test sources::windows_mut::test_windows_mut_zero_size_panics - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 34 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/fail.rs (/opt/rustwide/target/debug/deps/fail-18c6cc570dd8a5f3)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Compiling proc-macro2 v1.0.107
[INFO] [stderr]    Compiling quote v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]     Checking stable_try_trait_v2 v1.75.1 (/opt/rustwide/workdir/stable_try_trait_v2)
[INFO] [stderr]     Checking fallible-iterator v0.3.0
[INFO] [stderr]     Checking maybe-dangling v0.1.2
[INFO] [stderr]     Checking aliasable v0.1.3
[INFO] [stderr]    Compiling syn v2.0.119
[INFO] [stderr]    Compiling lender-derive v0.1.4 (/opt/rustwide/workdir/lender-derive)
[INFO] [stderr]     Checking lender v0.8.1 (/opt/rustwide/workdir/lender)
[INFO] [stderr]     Checking lender-tests v0.0.0 (/opt/rustwide/target/tests/trybuild/lender)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.23s
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] test tests/fail/chain_invariant.rs ... ok
[INFO] [stderr] test tests/fail/chunk_invariant.rs ... ok
[INFO] [stderr] test tests/fail/chunky_invariant.rs ... ok
[INFO] [stderr] test tests/fail/convert_invariant.rs ... ok
[INFO] [stderr] test tests/fail/covariant_fallible_lend_invariant.rs ... ok
[INFO] [stderr] test tests/fail/covariant_lend_invariant.rs ... ok
[INFO] [stderr] test tests/fail/cycle_invariant.rs ... ok
[INFO] [stderr] test tests/fail/empty_invariant.rs ... ok
[INFO] [stderr] test tests/fail/enumerate_invariant.rs ... ok
[INFO] [stderr] test tests/fail/filter_invariant.rs ... ok
[INFO] [stderr] test tests/fail/filter_map_invariant.rs ... ok
[INFO] [stderr] test tests/fail/flatten_invariant.rs ... ok
[INFO] [stderr] test tests/fail/from_fn_invariant.rs ... ok
[INFO] [stderr] test tests/fail/from_iter_invariant.rs ... ok
[INFO] [stderr] test tests/fail/fuse_invariant.rs ... ok
[INFO] [stderr] test tests/fail/hrc_invariant.rs ... ok
[INFO] [stderr] test tests/fail/inspect_invariant.rs ... ok
[INFO] [stderr] test tests/fail/intersperse_invariant.rs ... ok
[INFO] [stderr] test tests/fail/into_fallible_invariant.rs ... ok
[INFO] [stderr] test tests/fail/lend_iter_invariant.rs ... ok
[INFO] [stderr] test tests/fail/lend_rejects_complex.rs ... ok
[INFO] [stderr] test tests/fail/manual_covariant_lending_invariant.rs ... mismatch
[INFO] [stderr] 
[INFO] [stderr] EXPECTED:
[INFO] [stderr] ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
[INFO] [stderr] error[E0053]: method `__check_covariance` has an incompatible type for trait
[INFO] [stderr]   --> tests/fail/manual_covariant_lending_invariant.rs:32:16
[INFO] [stderr]    |
[INFO] [stderr] 32 |         proof: lender::CovariantProof<&'short <Self as lender::FallibleLending<'long>>::Lend>,
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Cell<Option<&'long String>>`, found `&'long Cell<Option<&'long String>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected signature `fn(lender::CovariantProof<&'long Cell<Option<&'long String>>>) -> lender::CovariantProof<&'short Cell<Option<&'short String>>>`
[INFO] [stderr]               found signature `fn(lender::CovariantProof<&'short &'long Cell<Option<&'long String>>>) -> lender::CovariantProof<&'short &'short Cell<Option<&'short String>>>`
[INFO] [stderr] help: change the parameter type to match the trait
[INFO] [stderr]    |
[INFO] [stderr] 32 -         proof: lender::CovariantProof<&'short <Self as lender::FallibleLending<'long>>::Lend>,
[INFO] [stderr] 32 +         proof: lender::CovariantProof<&'long Cell<Option<&'long String>>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: lifetime may not live long enough
[INFO] [stderr]   --> tests/fail/manual_covariant_lending_invariant.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn __check_covariance<'long: 'short, 'short>(
[INFO] [stderr]    |                           -----          ------ lifetime `'short` defined here
[INFO] [stderr]    |                           |
[INFO] [stderr]    |                           lifetime `'long` defined here
[INFO] [stderr] ...
[INFO] [stderr] 20 |         proof
[INFO] [stderr]    |         ^^^^^ associated function was supposed to return data with lifetime `'long` but it is returning data with lifetime `'short`
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding the following bound: `'short: 'long`
[INFO] [stderr]    = note: requirement occurs because of the type `Cell<Option<&String>>`, which makes the generic argument `Option<&String>` invariant
[INFO] [stderr]    = note: the struct `Cell<T>` is invariant over the parameter `T`
[INFO] [stderr]    = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
[INFO] [stderr] 
[INFO] [stderr] error: lifetime may not live long enough
[INFO] [stderr]   --> tests/fail/manual_covariant_lending_invariant.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn __check_covariance<'long: 'short, 'short>(
[INFO] [stderr]    |                           -----          ------ lifetime `'short` defined here
[INFO] [stderr]    |                           |
[INFO] [stderr]    |                           lifetime `'long` defined here
[INFO] [stderr] ...
[INFO] [stderr] 34 |         proof
[INFO] [stderr]    |         ^^^^^ associated function was supposed to return data with lifetime `'long` but it is returning data with lifetime `'short`
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding the following bound: `'short: 'long`
[INFO] [stderr]    = note: requirement occurs because of the type `Cell<Option<&String>>`, which makes the generic argument `Option<&String>` invariant
[INFO] [stderr]    = note: the struct `Cell<T>` is invariant over the parameter `T`
[INFO] [stderr]    = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
[INFO] [stderr] ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
[INFO] [stderr] 
[INFO] [stderr] ACTUAL OUTPUT:
[INFO] [stderr] ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
[INFO] [stderr] error[E0053]: method `__check_covariance` has an incompatible type for trait
[INFO] [stderr]   --> tests/fail/manual_covariant_lending_invariant.rs:32:16
[INFO] [stderr]    |
[INFO] [stderr] 32 |         proof: lender::CovariantProof<&'short <Self as lender::FallibleLending<'long>>::Lend>,
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Cell<Option<&'long String>>`, found `&'long Cell<Option<&'long String>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected signature `fn(CovariantProof<&'long Cell<Option<&'long String>>>) -> CovariantProof<&'short Cell<Option<&'short String>>>`
[INFO] [stderr]               found signature `fn(CovariantProof<&'short &'long Cell<Option<&'long String>>>) -> CovariantProof<&'short &'short Cell<Option<&'short String>>>`
[INFO] [stderr] help: change the parameter type to match the trait
[INFO] [stderr]    |
[INFO] [stderr] 32 -         proof: lender::CovariantProof<&'short <Self as lender::FallibleLending<'long>>::Lend>,
[INFO] [stderr] 32 +         proof: lender::CovariantProof<&'long Cell<Option<&'long String>>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: lifetime may not live long enough
[INFO] [stderr]   --> tests/fail/manual_covariant_lending_invariant.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn __check_covariance<'long: 'short, 'short>(
[INFO] [stderr]    |                           -----          ------ lifetime `'short` defined here
[INFO] [stderr]    |                           |
[INFO] [stderr]    |                           lifetime `'long` defined here
[INFO] [stderr] ...
[INFO] [stderr] 20 |         proof
[INFO] [stderr]    |         ^^^^^ associated function was supposed to return data with lifetime `'long` but it is returning data with lifetime `'short`
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding the following bound: `'short: 'long`
[INFO] [stderr]    = note: requirement occurs because of the type `Cell<Option<&String>>`, which makes the generic argument `Option<&String>` invariant
[INFO] [stderr]    = note: the struct `Cell<T>` is invariant over the parameter `T`
[INFO] [stderr]    = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
[INFO] [stderr] 
[INFO] [stderr] error: lifetime may not live long enough
[INFO] [stderr]   --> tests/fail/manual_covariant_lending_invariant.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn __check_covariance<'long: 'short, 'short>(
[INFO] [stderr]    |                           -----          ------ lifetime `'short` defined here
[INFO] [stderr]    |                           |
[INFO] [stderr]    |                           lifetime `'long` defined here
[INFO] [stderr] ...
[INFO] [stderr] 34 |         proof
[INFO] [stderr]    |         ^^^^^ associated function was supposed to return data with lifetime `'long` but it is returning data with lifetime `'short`
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding the following bound: `'short: 'long`
[INFO] [stderr]    = note: requirement occurs because of the type `Cell<Option<&String>>`, which makes the generic argument `Option<&String>` invariant
[INFO] [stderr]    = note: the struct `Cell<T>` is invariant over the parameter `T`
[INFO] [stderr]    = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
[INFO] [stderr] ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
[INFO] [stderr] note: If the actual output is the correct output you can bless it by rerunning
[INFO] [stderr]       your test with the environment variable TRYBUILD=overwrite
[INFO] [stderr] 
[INFO] [stderr] test tests/fail/map_bare_closure.rs ... ok
[INFO] [stderr] test tests/fail/map_err_invariant.rs ... ok
[INFO] [stderr] test tests/fail/map_invariant.rs ... ok
[INFO] [stderr] test tests/fail/map_while_invariant.rs ... ok
[INFO] [stderr] test tests/fail/might_look_covariant.rs ... ok
[INFO] [stderr] test tests/fail/mutate_invariant.rs ... ok
[INFO] [stderr] test tests/fail/once_covariant.rs ... ok
[INFO] [stderr] test tests/fail/once_invariant.rs ... ok
[INFO] [stderr] test tests/fail/once_with_invariant.rs ... ok
[INFO] [stderr] test tests/fail/peekable_escape.rs ... ok
[INFO] [stderr] test tests/fail/peekable_invariant.rs ... ok
[INFO] [stderr] test tests/fail/repeat_covariant.rs ... ok
[INFO] [stderr] test tests/fail/repeat_invariant.rs ... ok
[INFO] [stderr] test tests/fail/repeat_with_covariant.rs ... ok
[INFO] [stderr] test tests/fail/repeat_with_invariant.rs ... ok
[INFO] [stderr] test tests/fail/rev_invariant.rs ... ok
[INFO] [stderr] test tests/fail/scan_invariant.rs ... ok
[INFO] [stderr] test tests/fail/skip_invariant.rs ... ok
[INFO] [stderr] test tests/fail/skip_while_invariant.rs ... ok
[INFO] [stderr] test tests/fail/step_by_invariant.rs ... ok
[INFO] [stderr] test tests/fail/take_invariant.rs ... ok
[INFO] [stderr] test tests/fail/take_while_invariant.rs ... ok
[INFO] [stderr] test tests/fail/try_collect.rs ... ok
[INFO] [stderr] test tests/fail/windows_mut_invariant.rs ... ok
[INFO] [stderr] test tests/fail/zip_invariant.rs ... ok
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] error: test failed, to rerun pass `-p lender --test fail`
[INFO] [stdout] test fail ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- fail stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'fail' (1054) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/trybuild-1.0.119/src/run.rs:102:13:
[INFO] [stdout] 1 of 47 tests failed
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5709902c2ba1 - std[104cf6e2632825ea]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5709902c2ba1 - std[104cf6e2632825ea]::backtrace_rs::backtrace::trace_unsynchronized::<std[104cf6e2632825ea]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5709902c2ba1 - std[104cf6e2632825ea]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x5709902c2ba1 - <<std[104cf6e2632825ea]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[7c831bd917ebf35f]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x5709902d93aa - <core[7c831bd917ebf35f]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x5709902d93aa - core[7c831bd917ebf35f]::fmt::write
[INFO] [stdout]    6:     0x5709902c766c - core[7c831bd917ebf35f]::io::write::default_write_fmt::<alloc[2fdc3f7464fcf288]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/io/write.rs:402:11
[INFO] [stdout]    7:     0x5709902c766c - <alloc[2fdc3f7464fcf288]::vec::Vec<u8> as core[7c831bd917ebf35f]::io::write::Write>::write_fmt
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/io/write.rs:335:13
[INFO] [stdout]    8:     0x57099029c076 - <std[104cf6e2632825ea]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x57099029c076 - std[104cf6e2632825ea]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x5709902ba1c9 - std[104cf6e2632825ea]::panicking::default_hook
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x5709902534d0 - <alloc[2fdc3f7464fcf288]::boxed::Box<dyn for<'a, 'b> core[7c831bd917ebf35f]::ops::function::Fn<(&'a std[104cf6e2632825ea]::panic::PanicHookInfo<'b>,), Output = ()> + core[7c831bd917ebf35f]::marker::Send + core[7c831bd917ebf35f]::marker::Sync> as core[7c831bd917ebf35f]::ops::function::Fn<(&std[104cf6e2632825ea]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/alloc/src/boxed.rs:2334:9
[INFO] [stdout]   12:     0x5709902534d0 - test[73009c9f9aebf890]::test_main_inner::<test[73009c9f9aebf890]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/test/src/lib.rs:155:21
[INFO] [stdout]   13:     0x5709902ba382 - <alloc[2fdc3f7464fcf288]::boxed::Box<dyn for<'a, 'b> core[7c831bd917ebf35f]::ops::function::Fn<(&'a std[104cf6e2632825ea]::panic::PanicHookInfo<'b>,), Output = ()> + core[7c831bd917ebf35f]::marker::Send + core[7c831bd917ebf35f]::marker::Sync> as core[7c831bd917ebf35f]::ops::function::Fn<(&std[104cf6e2632825ea]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/alloc/src/boxed.rs:2334:9
[INFO] [stdout]   14:     0x5709902ba382 - std[104cf6e2632825ea]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panicking.rs:823:13
[INFO] [stdout]   15:     0x57099029c122 - std[104cf6e2632825ea]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panicking.rs:688:13
[INFO] [stdout]   16:     0x570990294249 - std[104cf6e2632825ea]::sys::backtrace::__rust_end_short_backtrace::<std[104cf6e2632825ea]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x57099029cd1d - __rustc[b0d56fa5b193ad05]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panicking.rs:679:5
[INFO] [stdout]   18:     0x5709902d9b9c - core[7c831bd917ebf35f]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x570990166a14 - <trybuild[7295cdb4703e43cc]::Runner>::run
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/trybuild-1.0.119/src/run.rs:102:13
[INFO] [stdout]   20:     0x5709901726d8 - <trybuild[7295cdb4703e43cc]::TestCases as core[7c831bd917ebf35f]::ops::drop::Drop>::drop
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/trybuild-1.0.119/src/lib.rs:342:38
[INFO] [stdout]   21:     0x570990028b27 - core[7c831bd917ebf35f]::ptr::drop_glue::<trybuild[7295cdb4703e43cc]::TestCases>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/ptr/mod.rs:847:1
[INFO] [stdout]   22:     0x570990028d33 - fail[f7f0aa0a7958d444]::fail
[INFO] [stdout]                                at /opt/rustwide/workdir/lender/tests/fail.rs:6:1
[INFO] [stdout]   23:     0x570990028c87 - fail[f7f0aa0a7958d444]::fail::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/lender/tests/fail.rs:3:10
[INFO] [stdout]   24:     0x570990029196 - <fail[f7f0aa0a7958d444]::fail::{closure#0} as core[7c831bd917ebf35f]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5709902467bb - <fn() -> core[7c831bd917ebf35f]::result::Result<(), alloc[2fdc3f7464fcf288]::string::String> as core[7c831bd917ebf35f]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x5709902467bb - test[73009c9f9aebf890]::__rust_begin_short_backtrace::<core[7c831bd917ebf35f]::result::Result<(), alloc[2fdc3f7464fcf288]::string::String>, fn() -> core[7c831bd917ebf35f]::result::Result<(), alloc[2fdc3f7464fcf288]::string::String>>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/test/src/lib.rs:733:18
[INFO] [stdout]   27:     0x570990253e25 - test[73009c9f9aebf890]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/test/src/lib.rs:756:74
[INFO] [stdout]   28:     0x570990253e25 - <core[7c831bd917ebf35f]::panic::unwind_safe::AssertUnwindSafe<test[73009c9f9aebf890]::run_test_in_process::{closure#0}> as core[7c831bd917ebf35f]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   29:     0x570990253e25 - std[104cf6e2632825ea]::panicking::catch_unwind::do_call::<core[7c831bd917ebf35f]::panic::unwind_safe::AssertUnwindSafe<test[73009c9f9aebf890]::run_test_in_process::{closure#0}>, core[7c831bd917ebf35f]::result::Result<(), alloc[2fdc3f7464fcf288]::string::String>>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panicking.rs:576:43
[INFO] [stdout]   30:     0x570990253e25 - std[104cf6e2632825ea]::panicking::catch_unwind::<core[7c831bd917ebf35f]::result::Result<(), alloc[2fdc3f7464fcf288]::string::String>, core[7c831bd917ebf35f]::panic::unwind_safe::AssertUnwindSafe<test[73009c9f9aebf890]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panicking.rs:544:19
[INFO] [stdout]   31:     0x570990253e25 - std[104cf6e2632825ea]::panic::catch_unwind::<core[7c831bd917ebf35f]::panic::unwind_safe::AssertUnwindSafe<test[73009c9f9aebf890]::run_test_in_process::{closure#0}>, core[7c831bd917ebf35f]::result::Result<(), alloc[2fdc3f7464fcf288]::string::String>>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panic.rs:359:14
[INFO] [stdout]   32:     0x570990253e25 - test[73009c9f9aebf890]::run_test_in_process
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/test/src/lib.rs:756:27
[INFO] [stdout]   33:     0x570990253e25 - test[73009c9f9aebf890]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/test/src/lib.rs:677:43
[INFO] [stdout]   34:     0x57099024d1e4 - test[73009c9f9aebf890]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/test/src/lib.rs:707:41
[INFO] [stdout]   35:     0x57099024d1e4 - std[104cf6e2632825ea]::sys::backtrace::__rust_begin_short_backtrace::<test[73009c9f9aebf890]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   36:     0x570990256f82 - std[104cf6e2632825ea]::thread::lifecycle::spawn_unchecked::<test[73009c9f9aebf890]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/thread/lifecycle.rs:70:13
[INFO] [stdout]   37:     0x570990256f82 - <core[7c831bd917ebf35f]::panic::unwind_safe::AssertUnwindSafe<std[104cf6e2632825ea]::thread::lifecycle::spawn_unchecked<test[73009c9f9aebf890]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[7c831bd917ebf35f]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   38:     0x570990256f82 - std[104cf6e2632825ea]::panicking::catch_unwind::do_call::<core[7c831bd917ebf35f]::panic::unwind_safe::AssertUnwindSafe<std[104cf6e2632825ea]::thread::lifecycle::spawn_unchecked<test[73009c9f9aebf890]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panicking.rs:576:43
[INFO] [stdout]   39:     0x570990256f82 - std[104cf6e2632825ea]::panicking::catch_unwind::<(), core[7c831bd917ebf35f]::panic::unwind_safe::AssertUnwindSafe<std[104cf6e2632825ea]::thread::lifecycle::spawn_unchecked<test[73009c9f9aebf890]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panicking.rs:544:19
[INFO] [stdout]   40:     0x570990256f82 - std[104cf6e2632825ea]::panic::catch_unwind::<core[7c831bd917ebf35f]::panic::unwind_safe::AssertUnwindSafe<std[104cf6e2632825ea]::thread::lifecycle::spawn_unchecked<test[73009c9f9aebf890]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/panic.rs:359:14
[INFO] [stdout]   41:     0x570990256f82 - std[104cf6e2632825ea]::thread::lifecycle::spawn_unchecked::<test[73009c9f9aebf890]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/thread/lifecycle.rs:68:26
[INFO] [stdout]   42:     0x570990256f82 - <std[104cf6e2632825ea]::thread::lifecycle::spawn_unchecked<test[73009c9f9aebf890]::run_test::{closure#1}, ()>::{closure#1} as core[7c831bd917ebf35f]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   43:     0x5709902c1e59 - <alloc[2fdc3f7464fcf288]::boxed::Box<dyn core[7c831bd917ebf35f]::ops::function::FnOnce<(), Output = ()> + core[7c831bd917ebf35f]::marker::Send> as core[7c831bd917ebf35f]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/alloc/src/boxed.rs:2320:9
[INFO] [stdout]   44:     0x5709902c1e59 - <std[104cf6e2632825ea]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/sys/thread/unix.rs:123:17
[INFO] [stdout]   45:     0x77faf956907a - <unknown>
[INFO] [stdout]   46:     0x77faf95fc534 - clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     fail
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 11.50s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8", kill_on_drop: false }`
[INFO] [stdout] 92dec2fb82e6a387d8ffe74849e743fd383c198a8e12048bb3586b6da880a5a8
