[INFO] fetching crate inkling 0.12.5...
[INFO] checking inkling-0.12.5 against a5689b034ad287112f709693384a37f1377eb9cc for pr-129249-3
[INFO] extracting crate inkling 0.12.5 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate inkling 0.12.5
[INFO] finished tweaking crates.io crate inkling 0.12.5
[INFO] tweaked toml for crates.io crate inkling 0.12.5 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate inkling 0.12.5 on toolchain a5689b034ad287112f709693384a37f1377eb9cc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate inkling 0.12.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 968f65ddcc5fdd0101e585e0d08cae3e747f21a1f4efca907c8e0823c3c337f7
[INFO] running `Command { std: "docker" "start" "968f65ddcc5fdd0101e585e0d08cae3e747f21a1f4efca907c8e0823c3c337f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "968f65ddcc5fdd0101e585e0d08cae3e747f21a1f4efca907c8e0823c3c337f7", 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" "968f65ddcc5fdd0101e585e0d08cae3e747f21a1f4efca907c8e0823c3c337f7" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "968f65ddcc5fdd0101e585e0d08cae3e747f21a1f4efca907c8e0823c3c337f7", 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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "968f65ddcc5fdd0101e585e0d08cae3e747f21a1f4efca907c8e0823c3c337f7" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling serde v1.0.97
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking inkling v0.12.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `get_stitch`
[INFO] [stdout]   --> src/knot/mod.rs:12:61
[INFO] [stdout]    |
[INFO] [stdout] 12 |     get_empty_knot_counts, get_mut_stitch, get_num_visited, get_stitch, increment_num_visited,
[INFO] [stdout]    |                                                             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `builders::RootNodeBuilder`
[INFO] [stdout]   --> src/node/mod.rs:14:16
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub use node::{builders::RootNodeBuilder, Branch, NodeItem, RootNode};
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `parse::read_story_content_from_string`
[INFO] [stdout]   --> src/story/mod.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub use parse::read_story_content_from_string;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_item` is never used
[INFO] [stdout]    --> src/node/follow.rs:256:8
[INFO] [stdout]     |
[INFO] [stdout] 168 | pub trait FollowInternal: fmt::Debug {
[INFO] [stdout]     |           -------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 256 |     fn get_item(&self, index: usize) -> Option<&NodeItem>;
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `InternalError`
[INFO] [stdout]    --> src/node/follow.rs:213:28
[INFO] [stdout]     |
[INFO] [stdout] 213 |             .map_err(|err| err.into())
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 213 -             .map_err(|err| err.into())
[INFO] [stdout] 213 +             .map_err(|err| err)
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 213 -             .map_err(|err| err.into())
[INFO] [stdout] 213 +             .map_err(|err| <InternalError as Into<_>>::into(err))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/node/follow.rs:260:23
[INFO] [stdout]     |
[INFO] [stdout] 260 |     fn iter_mut_items(&mut self) -> IterMut<NodeItem>;
[INFO] [stdout]     |                       ^^^^^^^^^     ^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 260 |     fn iter_mut_items(&mut self) -> IterMut<'_, NodeItem>;
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/node/follow.rs:280:23
[INFO] [stdout]     |
[INFO] [stdout] 280 |     fn iter_mut_items(&mut self) -> IterMut<NodeItem> {
[INFO] [stdout]     |                       ^^^^^^^^^     ^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 280 |     fn iter_mut_items(&mut self) -> IterMut<'_, NodeItem> {
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/node/follow.rs:304:23
[INFO] [stdout]     |
[INFO] [stdout] 304 |     fn iter_mut_items(&mut self) -> IterMut<NodeItem> {
[INFO] [stdout]     |                       ^^^^^^^^^     ^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 304 |     fn iter_mut_items(&mut self) -> IterMut<'_, NodeItem> {
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `inkling` (lib) due to 1 previous error; 7 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "968f65ddcc5fdd0101e585e0d08cae3e747f21a1f4efca907c8e0823c3c337f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "968f65ddcc5fdd0101e585e0d08cae3e747f21a1f4efca907c8e0823c3c337f7", kill_on_drop: false }`
[INFO] [stdout] 968f65ddcc5fdd0101e585e0d08cae3e747f21a1f4efca907c8e0823c3c337f7
