[INFO] fetching crate virtual-node 0.0.1...
[INFO] extracting crate virtual-node 0.0.1 into work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/virtual-node/0.0.1
[INFO] extracting crate virtual-node 0.0.1 into work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/reg/virtual-node/0.0.1
[INFO] validating manifest of virtual-node-0.0.1 on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of virtual-node-0.0.1 on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing virtual-node-0.0.1
[INFO] finished frobbing virtual-node-0.0.1
[INFO] frobbed toml for virtual-node-0.0.1 written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/virtual-node/0.0.1/Cargo.toml
[INFO] started frobbing virtual-node-0.0.1
[INFO] finished frobbing virtual-node-0.0.1
[INFO] frobbed toml for virtual-node-0.0.1 written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/reg/virtual-node/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking virtual-node-0.0.1 against try#290ac7b29f41ff9fa5232f9a1116ea71a3501063 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-1/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/reg/virtual-node/0.0.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 78c66d36e3268641a815212277f9b62b5cfa79691661581170d4dc6877e348a0
[INFO] running `"docker" "start" "-a" "78c66d36e3268641a815212277f9b62b5cfa79691661581170d4dc6877e348a0"`
[INFO] [stderr]    Compiling wasm-bindgen v0.2.38
[INFO] [stderr]    Compiling web-sys v0.3.15
[INFO] [stderr]     Checking js-sys v0.3.15
[INFO] [stderr]     Checking virtual-node v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `js_sys::Function`
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | use js_sys::Function;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `js_sys::Function`
[INFO] [stderr]  --> src/browser_events.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use js_sys::Function;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `wasm_bindgen::JsCast`
[INFO] [stderr]   --> src/browser_events.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use wasm_bindgen::JsCast;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:217:13
[INFO] [stderr]     |
[INFO] [stderr] 217 |         let mut callback = self.browser_events.oninput.borrow_mut().take();
[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 import: `js_sys::Function`
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | use js_sys::Function;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `js_sys::Function`
[INFO] [stderr]  --> src/browser_events.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use js_sys::Function;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `wasm_bindgen::JsCast`
[INFO] [stderr]   --> src/browser_events.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use wasm_bindgen::JsCast;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/lib.rs:405:9
[INFO] [stderr]     |
[INFO] [stderr] 405 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:373:13
[INFO] [stderr]     |
[INFO] [stderr] 373 |             write!(f, ">");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:217:13
[INFO] [stderr]     |
[INFO] [stderr] 217 |         let mut callback = self.browser_events.oninput.borrow_mut().take();
[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 `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:373:13
[INFO] [stderr]     |
[INFO] [stderr] 373 |             write!(f, ">");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.02s
[INFO] running `"docker" "inspect" "78c66d36e3268641a815212277f9b62b5cfa79691661581170d4dc6877e348a0"`
[INFO] running `"docker" "rm" "-f" "78c66d36e3268641a815212277f9b62b5cfa79691661581170d4dc6877e348a0"`
[INFO] [stdout] 78c66d36e3268641a815212277f9b62b5cfa79691661581170d4dc6877e348a0