[INFO] crate virtual-node 0.2.6 is already in cache
[INFO] extracting crate virtual-node 0.2.6 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/virtual-node/0.2.6
[INFO] extracting crate virtual-node 0.2.6 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/virtual-node/0.2.6
[INFO] validating manifest of virtual-node-0.2.6 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of virtual-node-0.2.6 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing virtual-node-0.2.6
[INFO] finished frobbing virtual-node-0.2.6
[INFO] frobbed toml for virtual-node-0.2.6 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/virtual-node/0.2.6/Cargo.toml
[INFO] started frobbing virtual-node-0.2.6
[INFO] finished frobbing virtual-node-0.2.6
[INFO] frobbed toml for virtual-node-0.2.6 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/virtual-node/0.2.6/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking virtual-node-0.2.6 against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-1/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/virtual-node/0.2.6:/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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 271fe7354fd0514b268184509af818802e57ecaa2f2ae9a42f49c3b06243d2ed
[INFO] running `"docker" "start" "-a" "271fe7354fd0514b268184509af818802e57ecaa2f2ae9a42f49c3b06243d2ed"`
[INFO] [stderr]    Compiling wasm-bindgen v0.2.49
[INFO] [stderr]     Checking html-validation v0.1.1
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.49
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.49
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.49
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.49
[INFO] [stderr]    Compiling web-sys v0.3.26
[INFO] [stderr]     Checking js-sys v0.3.26
[INFO] [stderr]     Checking virtual-node v0.2.6 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]   --> src/lib.rs:12:33
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]    |                                 ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `VElement`
[INFO] [stderr]  --> src/virtual_node_test_utils.rs:3:13
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::{VElement, VirtualNode};
[INFO] [stderr]   |             ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::FromIterator`
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | use std::iter::FromIterator;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::option::Iter`
[INFO] [stderr]   --> src/lib.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | use std::option::Iter;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]   --> src/lib.rs:12:33
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]    |                                 ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::FromIterator`
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | use std::iter::FromIterator;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::option::Iter`
[INFO] [stderr]   --> src/lib.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | use std::option::Iter;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:313:13
[INFO] [stderr]     |
[INFO] [stderr] 313 |             on_create_elem.call1(&wasm_bindgen::JsValue::NULL, &element);
[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] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:619:13
[INFO] [stderr]     |
[INFO] [stderr] 619 |         let mut text = VirtualNode::Text(VText::new("Hello world"));
[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:313:13
[INFO] [stderr]     |
[INFO] [stderr] 313 |             on_create_elem.call1(&wasm_bindgen::JsValue::NULL, &element);
[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] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.01s
[INFO] running `"docker" "inspect" "271fe7354fd0514b268184509af818802e57ecaa2f2ae9a42f49c3b06243d2ed"`
[INFO] running `"docker" "rm" "-f" "271fe7354fd0514b268184509af818802e57ecaa2f2ae9a42f49c3b06243d2ed"`
[INFO] [stdout] 271fe7354fd0514b268184509af818802e57ecaa2f2ae9a42f49c3b06243d2ed