[INFO] fetching crate rdftk_io 0.2.1...
[INFO] checking rdftk_io-0.2.1 against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] extracting crate rdftk_io 0.2.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rdftk_io 0.2.1 on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 792180e708f331bae69030f64969df043b61efba4c2aacdc63bc94cbbbe16cc2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "792180e708f331bae69030f64969df043b61efba4c2aacdc63bc94cbbbe16cc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "792180e708f331bae69030f64969df043b61efba4c2aacdc63bc94cbbbe16cc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "792180e708f331bae69030f64969df043b61efba4c2aacdc63bc94cbbbe16cc2", kill_on_drop: false }`
[INFO] [stdout] 792180e708f331bae69030f64969df043b61efba4c2aacdc63bc94cbbbe16cc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5caeb3f2dcaa32b4b5d6011ddf3f4cae9443f9aa32dbb8b22869e3312c6c27b8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5caeb3f2dcaa32b4b5d6011ddf3f4cae9443f9aa32dbb8b22869e3312c6c27b8", kill_on_drop: false }`
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking serde_json v1.0.66
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking 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]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[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: 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]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[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: unused result
[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
[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: unused result
[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
[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: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.70s
[INFO] running `Command { std: "docker" "inspect" "5caeb3f2dcaa32b4b5d6011ddf3f4cae9443f9aa32dbb8b22869e3312c6c27b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5caeb3f2dcaa32b4b5d6011ddf3f4cae9443f9aa32dbb8b22869e3312c6c27b8", kill_on_drop: false }`
[INFO] [stdout] 5caeb3f2dcaa32b4b5d6011ddf3f4cae9443f9aa32dbb8b22869e3312c6c27b8