[INFO] crate halcyon 0.0.1 is already in cache
[INFO] extracting crate halcyon 0.0.1 into work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/halcyon/0.0.1
[INFO] extracting crate halcyon 0.0.1 into work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/halcyon/0.0.1
[INFO] validating manifest of halcyon-0.0.1 on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of halcyon-0.0.1 on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing halcyon-0.0.1
[INFO] finished frobbing halcyon-0.0.1
[INFO] frobbed toml for halcyon-0.0.1 written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/halcyon/0.0.1/Cargo.toml
[INFO] started frobbing halcyon-0.0.1
[INFO] finished frobbing halcyon-0.0.1
[INFO] frobbed toml for halcyon-0.0.1 written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/halcyon/0.0.1/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking halcyon-0.0.1 against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-4/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/halcyon/0.0.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f34e82cd29e65a2bb8f8bf4fb4e3f3c951d2cc8abe3058d088274366e1c6db58
[INFO] running `"docker" "start" "-a" "f34e82cd29e65a2bb8f8bf4fb4e3f3c951d2cc8abe3058d088274366e1c6db58"`
[INFO] [stderr]     Checking halcyon v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `MemoryDOM`, `MemoryElement`
[INFO] [stderr]  --> src/lib.rs:1:27
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::dom::{Element, MemoryDOM, MemoryElement, DOM};
[INFO] [stderr]   |                           ^^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::extensions::attributes::Attributes`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::extensions::attributes::Attributes;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::Halcyon`
[INFO] [stderr]  --> src/extensions/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::Halcyon;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::Halcyon`
[INFO] [stderr]  --> src/extensions/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::Halcyon;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:20:20
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn init(&self, vnode: &VirtualNode) {}
[INFO] [stderr]    |                    ^^^^^ help: consider prefixing with an underscore: `_vnode`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `empty_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:21:22
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn create(&self, empty_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^^^^^^^ help: consider prefixing with an underscore: `_empty_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:21:49
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn create(&self, empty_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                                 ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:22:22
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn insert(&self, vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^ help: consider prefixing with an underscore: `_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:23:25
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn pre_patch(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                         ^^^^^^^^^ help: consider prefixing with an underscore: `_old_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:23:50
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn pre_patch(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                                  ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:24:22
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn update(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^^^^^ help: consider prefixing with an underscore: `_old_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:24:47
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn update(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                               ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:25:22
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn handle(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^^^^^ help: consider prefixing with an underscore: `_old_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:25:47
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn handle(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                               ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:26:23
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn destroy(&self, vnode: &VirtualNode) {}
[INFO] [stderr]    |                       ^^^^^ help: consider prefixing with an underscore: `_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:27:22
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn remove(&self, vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^ help: consider prefixing with an underscore: `_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_vnode`
[INFO] [stderr]   --> src/extensions/attributes.rs:28:22
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn update_attributes(old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^^^^^ help: consider prefixing with an underscore: `_old_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/attributes.rs:28:47
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn update_attributes(old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                               ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let mut c = self.current_vnode.borrow();
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:20:20
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn init(&self, vnode: &VirtualNode) {}
[INFO] [stderr]    |                    ^^^^^ help: consider prefixing with an underscore: `_vnode`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `empty_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:21:22
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn create(&self, empty_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^^^^^^^ help: consider prefixing with an underscore: `_empty_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:21:49
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn create(&self, empty_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                                 ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:22:22
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn insert(&self, vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^ help: consider prefixing with an underscore: `_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:23:25
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn pre_patch(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                         ^^^^^^^^^ help: consider prefixing with an underscore: `_old_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:23:50
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn pre_patch(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                                  ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:24:22
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn update(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^^^^^ help: consider prefixing with an underscore: `_old_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:24:47
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn update(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                               ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:25:22
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn handle(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^^^^^ help: consider prefixing with an underscore: `_old_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:25:47
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn handle(&self, old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                               ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:26:23
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn destroy(&self, vnode: &VirtualNode) {}
[INFO] [stderr]    |                       ^^^^^ help: consider prefixing with an underscore: `_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vnode`
[INFO] [stderr]   --> src/extensions/mod.rs:27:22
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn remove(&self, vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^ help: consider prefixing with an underscore: `_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_vnode`
[INFO] [stderr]   --> src/extensions/attributes.rs:28:22
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn update_attributes(old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                      ^^^^^^^^^ help: consider prefixing with an underscore: `_old_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_vnode`
[INFO] [stderr]   --> src/extensions/attributes.rs:28:47
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn update_attributes(old_vnode: &VirtualNode, new_vnode: &VirtualNode) {}
[INFO] [stderr]    |                                               ^^^^^^^^^ help: consider prefixing with an underscore: `_new_vnode`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let mut c = self.current_vnode.borrow();
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MemoryDOM`
[INFO] [stderr]   --> src/dom/mod.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub struct MemoryDOM {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/dom/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn new() -> Box<DOM> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/dom/mod.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn new(tag: &str) -> Rc<RefCell<Element>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Attributes`
[INFO] [stderr]  --> src/extensions/attributes.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Attributes {}
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/extensions/attributes.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn new() -> Attributes {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_element`
[INFO] [stderr]   --> src/lib.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn from_element(e: Rc<RefCell<Element>>) -> VirtualNode {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `"docker" "inspect" "f34e82cd29e65a2bb8f8bf4fb4e3f3c951d2cc8abe3058d088274366e1c6db58"`
[INFO] running `"docker" "rm" "-f" "f34e82cd29e65a2bb8f8bf4fb4e3f3c951d2cc8abe3058d088274366e1c6db58"`
[INFO] [stdout] f34e82cd29e65a2bb8f8bf4fb4e3f3c951d2cc8abe3058d088274366e1c6db58