[INFO] fetching crate ouroboros_examples 0.18.5...
[INFO] checking ouroboros_examples-0.18.5 against try#15e8bc6907ab2b3623cb52acc726f4787458df64 for pr-141352
[INFO] extracting crate ouroboros_examples 0.18.5 into /workspace/builds/worker-2-tc2/source
[INFO] checking ouroboros_examples-0.18.5 against try#15e8bc6907ab2b3623cb52acc726f4787458df64 for pr-141352
[INFO] extracting crate ouroboros_examples 0.18.5 into /workspace/builds/worker-2-tc2/source
[INFO] checking ouroboros_examples-0.18.5 against try#15e8bc6907ab2b3623cb52acc726f4787458df64 for pr-141352
[INFO] extracting crate ouroboros_examples 0.18.5 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate ouroboros_examples 0.18.5 on toolchain 15e8bc6907ab2b3623cb52acc726f4787458df64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 47 packages to latest compatible versions
[INFO] [stderr]       Adding trybuild v1.0.85 (available: v1.0.105)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2855dea76ac2af4b929f7f499df2a720b0214238b9a763963218eef7721cde3d
[INFO] running `Command { std: "docker" "start" "-a" "2855dea76ac2af4b929f7f499df2a720b0214238b9a763963218eef7721cde3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2855dea76ac2af4b929f7f499df2a720b0214238b9a763963218eef7721cde3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2855dea76ac2af4b929f7f499df2a720b0214238b9a763963218eef7721cde3d", kill_on_drop: false }`
[INFO] [stdout] 2855dea76ac2af4b929f7f499df2a720b0214238b9a763963218eef7721cde3d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a311de75e824d3fc0f022de3c574f754d5da20828c0f6dcfaee58c8e828ab48
[INFO] running `Command { std: "docker" "start" "-a" "4a311de75e824d3fc0f022de3c574f754d5da20828c0f6dcfaee58c8e828ab48", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling yansi v1.0.1
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking aliasable v0.1.3
[INFO] [stderr]     Checking ryu v1.0.20
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling trybuild v1.0.85
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.10.1
[INFO] [stderr]    Compiling rustversion v1.0.20
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking itoa v1.0.15
[INFO] [stderr]     Checking once_cell v1.21.3
[INFO] [stderr]     Checking pin-project-lite v0.2.16
[INFO] [stderr]     Checking glob v0.3.2
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]     Checking basic-toml v0.1.10
[INFO] [stderr]    Compiling ouroboros_macro v0.18.5
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]     Checking tokio v1.45.0
[INFO] [stderr]     Checking ouroboros v0.18.5
[INFO] [stderr]     Checking 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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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)]` 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 `dev` profile [unoptimized + debuginfo] target(s) in 9.08s
[INFO] running `Command { std: "docker" "inspect" "4a311de75e824d3fc0f022de3c574f754d5da20828c0f6dcfaee58c8e828ab48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a311de75e824d3fc0f022de3c574f754d5da20828c0f6dcfaee58c8e828ab48", kill_on_drop: false }`
[INFO] [stdout] 4a311de75e824d3fc0f022de3c574f754d5da20828c0f6dcfaee58c8e828ab48