[INFO] fetching crate rdftk_io 0.2.1...
[INFO] testing rdftk_io-0.2.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate rdftk_io 0.2.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate rdftk_io 0.2.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rdftk_io 0.2.1
[INFO] finished tweaking crates.io crate rdftk_io 0.2.1
[INFO] tweaked toml for crates.io crate rdftk_io 0.2.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rdftk_core v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3234eabde9f91d5d3d9f593f6789961c966b8e400c59362857e1d6e8cd19c4b4
[INFO] running `Command { std: "docker" "start" "-a" "3234eabde9f91d5d3d9f593f6789961c966b8e400c59362857e1d6e8cd19c4b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3234eabde9f91d5d3d9f593f6789961c966b8e400c59362857e1d6e8cd19c4b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3234eabde9f91d5d3d9f593f6789961c966b8e400c59362857e1d6e8cd19c4b4", kill_on_drop: false }`
[INFO] [stdout] 3234eabde9f91d5d3d9f593f6789961c966b8e400c59362857e1d6e8cd19c4b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 585caf3568debbd6c8bfd8b6404b080e4f89cc6d29f3d14666d8bc531be0f587
[INFO] running `Command { std: "docker" "start" "-a" "585caf3568debbd6c8bfd8b6404b080e4f89cc6d29f3d14666d8bc531be0f587", kill_on_drop: false }`
[INFO] [stderr]    Compiling gimli v0.28.1
[INFO] [stderr]    Compiling object v0.32.2
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling miniz_oxide v0.7.1
[INFO] [stderr]    Compiling ucd-trie v0.1.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]    Compiling uuid v1.6.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.23
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling blob-uuid v0.5.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling unique_id v0.1.5
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling bimap v0.6.3
[INFO] [stderr]    Compiling backtrace v0.3.69
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling pest v2.7.6
[INFO] [stderr]    Compiling chrono v0.4.31
[INFO] [stderr]    Compiling regex-automata v0.4.3
[INFO] [stderr]    Compiling addr2line v0.21.0
[INFO] [stderr]    Compiling pest_meta v2.7.6
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling pest_generator v2.7.6
[INFO] [stderr]    Compiling regex v1.10.2
[INFO] [stderr]    Compiling rdftk_iri v0.1.9
[INFO] [stderr]    Compiling pest_derive v2.7.6
[INFO] [stderr]    Compiling rdftk_names v0.1.9
[INFO] [stderr]    Compiling rdftk_core v0.3.1
[INFO] [stderr]    Compiling rdftk_io v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `subject` is never read
[INFO] [stdout]    --> src/xml/reader.rs:267:17
[INFO] [stdout]     |
[INFO] [stdout] 267 |                 subject = Some(subject_node);
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]    --> src/xml/reader.rs:198:5
[INFO] [stdout]     |
[INFO] [stdout] 198 |     subject: Option<&SubjectNodeRef>,
[INFO] [stdout]     |     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `no_child_elements` is never read
[INFO] [stdout]    --> src/xml/reader.rs:358:21
[INFO] [stdout]     |
[INFO] [stdout] 358 |                     no_child_elements = true;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `namespace`
[INFO] [stdout]    --> src/xml/reader.rs:455:17
[INFO] [stdout]     |
[INFO] [stdout] 455 |                 namespace,
[INFO] [stdout]     |                 ^^^^^^^^^ help: try ignoring the field: `namespace: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_elements` is never read
[INFO] [stdout]    --> src/xml/reader.rs:462:17
[INFO] [stdout]     |
[INFO] [stdout] 462 |                 has_elements = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/xml/reader.rs:476:39
[INFO] [stdout]     |
[INFO] [stdout] 476 |             Ok(XmlEvent::EndElement { name }) => {
[INFO] [stdout]     |                                       ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_characters` is never read
[INFO] [stdout]    --> src/xml/reader.rs:485:17
[INFO] [stdout]     |
[INFO] [stdout] 485 |                 has_characters = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_characters` is never read
[INFO] [stdout]    --> src/xml/reader.rs:493:17
[INFO] [stdout]     |
[INFO] [stdout] 493 |                 has_characters = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/nt/writer.rs:49:26
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let graph = graph.borrow();
[INFO] [stdout]    |                          ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Rc<RefCell<dyn Graph>>` does not implement `Borrow`, so calling `borrow` on `&Rc<RefCell<dyn Graph>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused result of type `Option<Rc<dyn SubjectNode>>`
[INFO] [stdout]    --> src/xml/reader.rs:410:29
[INFO] [stdout]     |
[INFO] [stdout] 410 | / ...                   parse_subject_element(
[INFO] [stdout] 411 | | ...                       event_reader,
[INFO] [stdout] 412 | | ...                       if attributes.uri_base.is_some() {
[INFO] [stdout] 413 | | ...                           &attributes.uri_base
[INFO] [stdout] ...   |
[INFO] [stdout] 418 | | ...                       graph,
[INFO] [stdout] 419 | | ...                   )?;
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:63:5
[INFO] [stdout]     |
[INFO] [stdout] 63  |     unused_results,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused result of type `Option<Rc<dyn SubjectNode>>`
[INFO] [stdout]    --> src/xml/reader.rs:465:17
[INFO] [stdout]     |
[INFO] [stdout] 465 | /                 parse_subject_element(
[INFO] [stdout] 466 | |                     event_reader,
[INFO] [stdout] 467 | |                     if attributes.uri_base.is_some() {
[INFO] [stdout] 468 | |                         &attributes.uri_base
[INFO] [stdout] ...   |
[INFO] [stdout] 473 | |                     graph,
[INFO] [stdout] 474 | |                 )?;
[INFO] [stdout]     | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.96s
[INFO] running `Command { std: "docker" "inspect" "585caf3568debbd6c8bfd8b6404b080e4f89cc6d29f3d14666d8bc531be0f587", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "585caf3568debbd6c8bfd8b6404b080e4f89cc6d29f3d14666d8bc531be0f587", kill_on_drop: false }`
[INFO] [stdout] 585caf3568debbd6c8bfd8b6404b080e4f89cc6d29f3d14666d8bc531be0f587
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 385954ceab2bc1cae9f8edaaafec63c1b0561faf12ac5bcd92939ff59e972bb7
[INFO] running `Command { std: "docker" "start" "-a" "385954ceab2bc1cae9f8edaaafec63c1b0561faf12ac5bcd92939ff59e972bb7", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `subject` is never read
[INFO] [stdout]    --> src/xml/reader.rs:267:17
[INFO] [stdout]     |
[INFO] [stdout] 267 |                 subject = Some(subject_node);
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]    --> src/xml/reader.rs:198:5
[INFO] [stdout]     |
[INFO] [stdout] 198 |     subject: Option<&SubjectNodeRef>,
[INFO] [stdout]     |     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `no_child_elements` is never read
[INFO] [stdout]    --> src/xml/reader.rs:358:21
[INFO] [stdout]     |
[INFO] [stdout] 358 |                     no_child_elements = true;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `namespace`
[INFO] [stdout]    --> src/xml/reader.rs:455:17
[INFO] [stdout]     |
[INFO] [stdout] 455 |                 namespace,
[INFO] [stdout]     |                 ^^^^^^^^^ help: try ignoring the field: `namespace: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_elements` is never read
[INFO] [stdout]    --> src/xml/reader.rs:462:17
[INFO] [stdout]     |
[INFO] [stdout] 462 |                 has_elements = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/xml/reader.rs:476:39
[INFO] [stdout]     |
[INFO] [stdout] 476 |             Ok(XmlEvent::EndElement { name }) => {
[INFO] [stdout]     |                                       ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_characters` is never read
[INFO] [stdout]    --> src/xml/reader.rs:485:17
[INFO] [stdout]     |
[INFO] [stdout] 485 |                 has_characters = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_characters` is never read
[INFO] [stdout]    --> src/xml/reader.rs:493:17
[INFO] [stdout]     |
[INFO] [stdout] 493 |                 has_characters = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/nt/writer.rs:49:26
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let graph = graph.borrow();
[INFO] [stdout]    |                          ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Rc<RefCell<dyn Graph>>` does not implement `Borrow`, so calling `borrow` on `&Rc<RefCell<dyn Graph>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused result of type `Option<Rc<dyn SubjectNode>>`
[INFO] [stdout]    --> src/xml/reader.rs:410:29
[INFO] [stdout]     |
[INFO] [stdout] 410 | / ...                   parse_subject_element(
[INFO] [stdout] 411 | | ...                       event_reader,
[INFO] [stdout] 412 | | ...                       if attributes.uri_base.is_some() {
[INFO] [stdout] 413 | | ...                           &attributes.uri_base
[INFO] [stdout] ...   |
[INFO] [stdout] 418 | | ...                       graph,
[INFO] [stdout] 419 | | ...                   )?;
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:63:5
[INFO] [stdout]     |
[INFO] [stdout] 63  |     unused_results,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused result of type `Option<Rc<dyn SubjectNode>>`
[INFO] [stdout]    --> src/xml/reader.rs:465:17
[INFO] [stdout]     |
[INFO] [stdout] 465 | /                 parse_subject_element(
[INFO] [stdout] 466 | |                     event_reader,
[INFO] [stdout] 467 | |                     if attributes.uri_base.is_some() {
[INFO] [stdout] 468 | |                         &attributes.uri_base
[INFO] [stdout] ...   |
[INFO] [stdout] 473 | |                     graph,
[INFO] [stdout] 474 | |                 )?;
[INFO] [stdout]     | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling termcolor v1.4.0
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling pretty_assertions v0.7.2
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling rdftk_io v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `subject` is never read
[INFO] [stdout]    --> src/xml/reader.rs:267:17
[INFO] [stdout]     |
[INFO] [stdout] 267 |                 subject = Some(subject_node);
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]    --> src/xml/reader.rs:198:5
[INFO] [stdout]     |
[INFO] [stdout] 198 |     subject: Option<&SubjectNodeRef>,
[INFO] [stdout]     |     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `no_child_elements` is never read
[INFO] [stdout]    --> src/xml/reader.rs:358:21
[INFO] [stdout]     |
[INFO] [stdout] 358 |                     no_child_elements = true;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `namespace`
[INFO] [stdout]    --> src/xml/reader.rs:455:17
[INFO] [stdout]     |
[INFO] [stdout] 455 |                 namespace,
[INFO] [stdout]     |                 ^^^^^^^^^ help: try ignoring the field: `namespace: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_elements` is never read
[INFO] [stdout]    --> src/xml/reader.rs:462:17
[INFO] [stdout]     |
[INFO] [stdout] 462 |                 has_elements = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/xml/reader.rs:476:39
[INFO] [stdout]     |
[INFO] [stdout] 476 |             Ok(XmlEvent::EndElement { name }) => {
[INFO] [stdout]     |                                       ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_characters` is never read
[INFO] [stdout]    --> src/xml/reader.rs:485:17
[INFO] [stdout]     |
[INFO] [stdout] 485 |                 has_characters = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_characters` is never read
[INFO] [stdout]    --> src/xml/reader.rs:493:17
[INFO] [stdout]     |
[INFO] [stdout] 493 |                 has_characters = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/nt/writer.rs:49:26
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let graph = graph.borrow();
[INFO] [stdout]    |                          ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Rc<RefCell<dyn Graph>>` does not implement `Borrow`, so calling `borrow` on `&Rc<RefCell<dyn Graph>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused result of type `Option<Rc<dyn SubjectNode>>`
[INFO] [stdout]    --> src/xml/reader.rs:410:29
[INFO] [stdout]     |
[INFO] [stdout] 410 | / ...                   parse_subject_element(
[INFO] [stdout] 411 | | ...                       event_reader,
[INFO] [stdout] 412 | | ...                       if attributes.uri_base.is_some() {
[INFO] [stdout] 413 | | ...                           &attributes.uri_base
[INFO] [stdout] ...   |
[INFO] [stdout] 418 | | ...                       graph,
[INFO] [stdout] 419 | | ...                   )?;
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:63:5
[INFO] [stdout]     |
[INFO] [stdout] 63  |     unused_results,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused result of type `Option<Rc<dyn SubjectNode>>`
[INFO] [stdout]    --> src/xml/reader.rs:465:17
[INFO] [stdout]     |
[INFO] [stdout] 465 | /                 parse_subject_element(
[INFO] [stdout] 466 | |                     event_reader,
[INFO] [stdout] 467 | |                     if attributes.uri_base.is_some() {
[INFO] [stdout] 468 | |                         &attributes.uri_base
[INFO] [stdout] ...   |
[INFO] [stdout] 473 | |                     graph,
[INFO] [stdout] 474 | |                 )?;
[INFO] [stdout]     | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rdftk_io` (lib test); 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustc --crate-name rdftk_io --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --cfg 'feature="default"' --cfg 'feature="json"' --cfg 'feature="n3"' --cfg 'feature="nq"' --cfg 'feature="nt"' --cfg 'feature="pest"' --cfg 'feature="pest_derive"' --cfg 'feature="rdftk_names"' --cfg 'feature="serde_json"' --cfg 'feature="turtle"' --cfg 'feature="xml"' --cfg 'feature="xml-rs"' -C metadata=e312a7ccbbf3a474 -C extra-filename=-e312a7ccbbf3a474 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-6470394b9ea3bb92.rlib --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-591486ebcb9a7ead.rlib --extern log=/opt/rustwide/target/debug/deps/liblog-e491f2c1d0b13538.rlib --extern pest=/opt/rustwide/target/debug/deps/libpest-fb4812e616e96206.rlib --extern pest_derive=/opt/rustwide/target/debug/deps/libpest_derive-c09813faad1f12dd.so --extern pretty_assertions=/opt/rustwide/target/debug/deps/libpretty_assertions-a257444b4278cc12.rlib --extern pretty_env_logger=/opt/rustwide/target/debug/deps/libpretty_env_logger-c11f3420cacd5ecf.rlib --extern rdftk_core=/opt/rustwide/target/debug/deps/librdftk_core-13e23c9f43864591.rlib --extern rdftk_iri=/opt/rustwide/target/debug/deps/librdftk_iri-62913d09ff74b652.rlib --extern rdftk_names=/opt/rustwide/target/debug/deps/librdftk_names-e5e2391627826489.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-3fdc9a8f6eaf81cf.rlib --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-e03a1e42bcaba08e.rlib --extern xml=/opt/rustwide/target/debug/deps/libxml-e34a9b031bfa9b68.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "385954ceab2bc1cae9f8edaaafec63c1b0561faf12ac5bcd92939ff59e972bb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "385954ceab2bc1cae9f8edaaafec63c1b0561faf12ac5bcd92939ff59e972bb7", kill_on_drop: false }`
[INFO] [stdout] 385954ceab2bc1cae9f8edaaafec63c1b0561faf12ac5bcd92939ff59e972bb7
