[INFO] fetching crate ouroboros_examples 0.18.5...
[INFO] testing ouroboros_examples-0.18.5 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate ouroboros_examples 0.18.5 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate ouroboros_examples 0.18.5
[INFO] finished tweaking crates.io crate ouroboros_examples 0.18.5
[INFO] tweaked toml for crates.io crate ouroboros_examples 0.18.5 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ouroboros_examples 0.18.5 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 31 packages to latest compatible versions
[INFO] [stderr]       Adding trybuild v1.0.85 (available: v1.0.114)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ouroboros v0.18.5
[INFO] [stderr]   Downloaded ouroboros_macro v0.18.5
[INFO] [stderr]   Downloaded trybuild v1.0.85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e28495b4856e24d6fa887976140d5e6b7ef0e6af0b3fb1a01b56a361cf831f33
[INFO] running `Command { std: "docker" "start" "-a" "e28495b4856e24d6fa887976140d5e6b7ef0e6af0b3fb1a01b56a361cf831f33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e28495b4856e24d6fa887976140d5e6b7ef0e6af0b3fb1a01b56a361cf831f33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e28495b4856e24d6fa887976140d5e6b7ef0e6af0b3fb1a01b56a361cf831f33", kill_on_drop: false }`
[INFO] [stdout] e28495b4856e24d6fa887976140d5e6b7ef0e6af0b3fb1a01b56a361cf831f33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8a0f7c7775c06a3c0827515bb2c315369d2ff18c52353098ee57f50bfd7f117
[INFO] running `Command { std: "docker" "start" "-a" "c8a0f7c7775c06a3c0827515bb2c315369d2ff18c52353098ee57f50bfd7f117", kill_on_drop: false }`
[INFO] [stderr]    Compiling yansi v1.0.1
[INFO] [stderr]    Compiling aliasable v0.1.3
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.10.1
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling ouroboros_macro v0.18.5
[INFO] [stderr]    Compiling ouroboros v0.18.5
[INFO] [stderr]    Compiling ouroboros_examples v0.18.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:11:43
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Ext<'this, T, const REV: bool>(&'this Box<T>);
[INFO] [stdout]    |            --- field in this struct       ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.79s
[INFO] running `Command { std: "docker" "inspect" "c8a0f7c7775c06a3c0827515bb2c315369d2ff18c52353098ee57f50bfd7f117", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8a0f7c7775c06a3c0827515bb2c315369d2ff18c52353098ee57f50bfd7f117", kill_on_drop: false }`
[INFO] [stdout] c8a0f7c7775c06a3c0827515bb2c315369d2ff18c52353098ee57f50bfd7f117
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0570e4089b231a285fec2d1f62459c12250f85fb33e90933866224898762885
[INFO] running `Command { std: "docker" "start" "-a" "b0570e4089b231a285fec2d1f62459c12250f85fb33e90933866224898762885", kill_on_drop: false }`
[INFO] [stderr]    Compiling trybuild v1.0.85
[INFO] [stderr]    Compiling basic-toml v0.1.10
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling tokio-macros v2.6.0
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:11:43
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Ext<'this, T, const REV: bool>(&'this Box<T>);
[INFO] [stdout]    |            --- field in this struct       ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tokio v1.48.0
[INFO] [stderr]    Compiling ouroboros_examples v0.18.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:11:43
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Ext<'this, T, const REV: bool>(&'this Box<T>);
[INFO] [stdout]    |            --- field in this struct       ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/ok_tests.rs:259:5
[INFO] [stdout]     |
[INFO] [stdout] 259 |     drop(instance.borrow_external());
[INFO] [stdout]     |     ^^^^^--------------------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&&str`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 259 -     drop(instance.borrow_external());
[INFO] [stdout] 259 +     let _ = instance.borrow_external();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/ok_tests.rs:260:5
[INFO] [stdout]     |
[INFO] [stdout] 260 |     drop(instance.borrow_internal());
[INFO] [stdout]     |     ^^^^^--------------------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&&&str`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 260 -     drop(instance.borrow_internal());
[INFO] [stdout] 260 +     let _ = instance.borrow_internal();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 10.14s
[INFO] running `Command { std: "docker" "inspect" "b0570e4089b231a285fec2d1f62459c12250f85fb33e90933866224898762885", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0570e4089b231a285fec2d1f62459c12250f85fb33e90933866224898762885", kill_on_drop: false }`
[INFO] [stdout] b0570e4089b231a285fec2d1f62459c12250f85fb33e90933866224898762885
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b84cbc0bf1f178d331f108157f36cf4dc5aedc36e2da5325f4cc1e70f38991b7
[INFO] running `Command { std: "docker" "start" "-a" "b84cbc0bf1f178d331f108157f36cf4dc5aedc36e2da5325f4cc1e70f38991b7", kill_on_drop: false }`
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/lib.rs:11:43
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct Ext<'this, T, const REV: bool>(&'this Box<T>);
[INFO] [stderr]    |            --- field in this struct       ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing this field
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]    --> src/ok_tests.rs:259:5
[INFO] [stderr]     |
[INFO] [stderr] 259 |     drop(instance.borrow_external());
[INFO] [stderr]     |     ^^^^^--------------------------^
[INFO] [stderr]     |          |
[INFO] [stderr]     |          argument has type `&&str`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     |
[INFO] [stderr] 259 -     drop(instance.borrow_external());
[INFO] [stderr] 259 +     let _ = instance.borrow_external();
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]    --> src/ok_tests.rs:260:5
[INFO] [stderr]     |
[INFO] [stderr] 260 |     drop(instance.borrow_internal());
[INFO] [stderr]     |     ^^^^^--------------------------^
[INFO] [stderr]     |          |
[INFO] [stderr]     |          argument has type `&&&str`
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     |
[INFO] [stderr] 260 -     drop(instance.borrow_internal());
[INFO] [stderr] 260 +     let _ = instance.borrow_internal();
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `ouroboros_examples` (lib) generated 1 warning
[INFO] [stderr] warning: `ouroboros_examples` (lib test) generated 3 warnings (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ouroboros_examples-ed790fb998cce8a3)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stderr]    Doc-tests ouroboros_examples
[INFO] [stdout] test ok_tests::box_and_mut_ref ... ok
[INFO] [stdout] test ok_tests::box_and_ref ... ok
[INFO] [stdout] test ok_tests::double_lifetime ... ok
[INFO] [stdout] test ok_tests::async_try_new_err ... ok
[INFO] [stdout] test ok_tests::into_heads ... ok
[INFO] [stdout] test ok_tests::async_try_new ... ok
[INFO] [stdout] test ok_tests::async_new ... ok
[INFO] [stdout] test ok_tests::self_reference_with ... ok
[INFO] [stdout] test ok_tests::single_lifetime ... ok
[INFO] [stdout] test ok_tests::try_new ... ok
[INFO] [stdout] test ok_tests::try_new_err ... ok
[INFO] [stdout] test ok_tests::try_new_recover_heads ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b84cbc0bf1f178d331f108157f36cf4dc5aedc36e2da5325f4cc1e70f38991b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b84cbc0bf1f178d331f108157f36cf4dc5aedc36e2da5325f4cc1e70f38991b7", kill_on_drop: false }`
[INFO] [stdout] b84cbc0bf1f178d331f108157f36cf4dc5aedc36e2da5325f4cc1e70f38991b7