[INFO] fetching crate xml_dom 0.2.6...
[INFO] checking xml_dom-0.2.6 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate xml_dom 0.2.6 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate xml_dom 0.2.6 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xml_dom 0.2.6
[INFO] finished tweaking crates.io crate xml_dom 0.2.6
[INFO] tweaked toml for crates.io crate xml_dom 0.2.6 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate xml_dom 0.2.6 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b0f305b6bd82310344100be2e60a549e788ced00c063f95a84ad24ae269db30
[INFO] running `Command { std: "docker" "start" "-a" "5b0f305b6bd82310344100be2e60a549e788ced00c063f95a84ad24ae269db30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b0f305b6bd82310344100be2e60a549e788ced00c063f95a84ad24ae269db30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b0f305b6bd82310344100be2e60a549e788ced00c063f95a84ad24ae269db30", kill_on_drop: false }`
[INFO] [stdout] 5b0f305b6bd82310344100be2e60a549e788ced00c063f95a84ad24ae269db30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 987139557fe6401b6e3f84bff8c25ba66dbbb7529c41947124fbb326daa0b13d
[INFO] running `Command { std: "docker" "start" "-a" "987139557fe6401b6e3f84bff8c25ba66dbbb7529c41947124fbb326daa0b13d", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking quick-xml v0.23.0
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking xml_dom v0.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `trait_impls::*`
[INFO] [stdout]   --> src/level2/ext/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub use trait_impls::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `trait_impls::*`
[INFO] [stdout]   --> src/level2/ext/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub use trait_impls::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `remove_mapping` and `normalize_mappings` are never used
[INFO] [stdout]   --> src/level2/ext/namespaced.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub(crate) trait MutNamespaced: Namespaced {
[INFO] [stdout]    |                  ------------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn remove_mapping(&mut self, prefix: Option<&str>) -> Result<Option<String>>;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 38 |     fn normalize_mappings(&mut self) -> Result<()>;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&dyn level2::traits::DOMImplementation<NodeRef = RcRefCell<node_impl::NodeImpl>>` instead of cloning the inner type
[INFO] [stdout]    --> src/level2/node_impl.rs:321:51
[INFO] [stdout]     |
[INFO] [stdout] 321 |                 i_implementation: i_implementation.clone(),
[INFO] [stdout]     |                                                   ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable `pub` item
[INFO] [stdout]    --> src/level2/ext/mod.rs:26:9
[INFO] [stdout]     |
[INFO] [stdout] 26  | pub use trait_impls::*;
[INFO] [stdout]     | ---     ^^^^^^^^^^^
[INFO] [stdout]     | |
[INFO] [stdout]     | help: consider restricting its visibility: `pub(crate)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: or consider exporting it for use by other crates
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:136:5
[INFO] [stdout]     |
[INFO] [stdout] 136 |     unreachable_pub,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `remove_mapping` and `normalize_mappings` are never used
[INFO] [stdout]   --> src/level2/ext/namespaced.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub(crate) trait MutNamespaced: Namespaced {
[INFO] [stdout]    |                  ------------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn remove_mapping(&mut self, prefix: Option<&str>) -> Result<Option<String>>;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 38 |     fn normalize_mappings(&mut self) -> Result<()>;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&dyn level2::traits::DOMImplementation<NodeRef = rc_cell::RcRefCell<node_impl::NodeImpl>>` instead of cloning the inner type
[INFO] [stdout]    --> src/level2/node_impl.rs:321:51
[INFO] [stdout]     |
[INFO] [stdout] 321 |                 i_implementation: i_implementation.clone(),
[INFO] [stdout]     |                                                   ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable `pub` item
[INFO] [stdout]    --> src/level2/ext/mod.rs:26:9
[INFO] [stdout]     |
[INFO] [stdout] 26  | pub use trait_impls::*;
[INFO] [stdout]     | ---     ^^^^^^^^^^^
[INFO] [stdout]     | |
[INFO] [stdout]     | help: consider restricting its visibility: `pub(crate)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: or consider exporting it for use by other crates
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:136:5
[INFO] [stdout]     |
[INFO] [stdout] 136 |     unreachable_pub,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.51s
[INFO] running `Command { std: "docker" "inspect" "987139557fe6401b6e3f84bff8c25ba66dbbb7529c41947124fbb326daa0b13d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "987139557fe6401b6e3f84bff8c25ba66dbbb7529c41947124fbb326daa0b13d", kill_on_drop: false }`
[INFO] [stdout] 987139557fe6401b6e3f84bff8c25ba66dbbb7529c41947124fbb326daa0b13d