[INFO] fetching crate ouroboros_examples 0.18.5...
[INFO] building ouroboros_examples-0.18.5 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate ouroboros_examples 0.18.5 into /workspace/builds/worker-5-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-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ouroboros_examples 0.18.5 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 55 packages to latest compatible versions
[INFO] [stderr]       Adding trybuild v1.0.85 (available: v1.0.111)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ouroboros_macro v0.18.5
[INFO] [stderr]   Downloaded trybuild v1.0.85
[INFO] [stderr]   Downloaded aliasable v0.1.3
[INFO] [stderr]   Downloaded ouroboros v0.18.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee4ea5b19bd290ac4683c1876dc5da0ac0ca806b7bc79678429b3307d82c9c3c
[INFO] running `Command { std: "docker" "start" "-a" "ee4ea5b19bd290ac4683c1876dc5da0ac0ca806b7bc79678429b3307d82c9c3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee4ea5b19bd290ac4683c1876dc5da0ac0ca806b7bc79678429b3307d82c9c3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee4ea5b19bd290ac4683c1876dc5da0ac0ca806b7bc79678429b3307d82c9c3c", kill_on_drop: false }`
[INFO] [stdout] ee4ea5b19bd290ac4683c1876dc5da0ac0ca806b7bc79678429b3307d82c9c3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 490c8cd27f12eb9ddc0859703321b3d6631bac30931bbf23c791f191b0cd943d
[INFO] running `Command { std: "docker" "start" "-a" "490c8cd27f12eb9ddc0859703321b3d6631bac30931bbf23c791f191b0cd943d", kill_on_drop: false }`
[INFO] [stderr]    Compiling yansi v1.0.1
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling aliasable v0.1.3
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.10.1
[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 4.29s
[INFO] running `Command { std: "docker" "inspect" "490c8cd27f12eb9ddc0859703321b3d6631bac30931bbf23c791f191b0cd943d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "490c8cd27f12eb9ddc0859703321b3d6631bac30931bbf23c791f191b0cd943d", kill_on_drop: false }`
[INFO] [stdout] 490c8cd27f12eb9ddc0859703321b3d6631bac30931bbf23c791f191b0cd943d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ccb4393ff30665c2d94cd8187c3bf3d2746c67293161edc6aab0ae09c6edecb7
[INFO] running `Command { std: "docker" "start" "-a" "ccb4393ff30665c2d94cd8187c3bf3d2746c67293161edc6aab0ae09c6edecb7", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling trybuild v1.0.85
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[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 v1.47.1
[INFO] [stderr]    Compiling basic-toml v0.1.10
[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 12.00s
[INFO] running `Command { std: "docker" "inspect" "ccb4393ff30665c2d94cd8187c3bf3d2746c67293161edc6aab0ae09c6edecb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccb4393ff30665c2d94cd8187c3bf3d2746c67293161edc6aab0ae09c6edecb7", kill_on_drop: false }`
[INFO] [stdout] ccb4393ff30665c2d94cd8187c3bf3d2746c67293161edc6aab0ae09c6edecb7