[INFO] crate sauron-native 0.1.0 is already in cache
[INFO] extracting crate sauron-native 0.1.0 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/sauron-native/0.1.0
[INFO] extracting crate sauron-native 0.1.0 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/sauron-native/0.1.0
[INFO] validating manifest of sauron-native-0.1.0 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 sauron-native-0.1.0 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 sauron-native-0.1.0
[INFO] finished frobbing sauron-native-0.1.0
[INFO] frobbed toml for sauron-native-0.1.0 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/sauron-native/0.1.0/Cargo.toml
[INFO] started frobbing sauron-native-0.1.0
[INFO] finished frobbing sauron-native-0.1.0
[INFO] frobbed toml for sauron-native-0.1.0 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/sauron-native/0.1.0/Cargo.toml
[INFO] crate sauron-native-0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking sauron-native-0.1.0 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/sauron-native/0.1.0:/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] 2542ded602b506c195d7a93d608d5437ed675865cbafe14cfc9881bfbaf42cbd
[INFO] running `"docker" "start" "-a" "2542ded602b506c195d7a93d608d5437ed675865cbafe14cfc9881bfbaf42cbd"`
[INFO] [stderr]     Checking sauron_vdom v0.10.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.48
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking stderrlog v0.4.1
[INFO] [stderr]     Checking sauron-native v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Node`, `Widget`
[INFO] [stderr]  --> src/backend.rs:1:24
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::{Component, Node, Widget};
[INFO] [stderr]   |                        ^^^^  ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Node`
[INFO] [stderr]  --> src/program.rs:1:42
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::{backend::Backend, Component, Node};
[INFO] [stderr]   |                                          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `cell::RefCell`
[INFO] [stderr]  --> src/program.rs:2:11
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::{cell::RefCell, fmt::Debug, marker::PhantomData, rc::Rc};
[INFO] [stderr]   |           ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `event`
[INFO] [stderr]  --> src/component.rs:6:28
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn on_event(&mut self, event: Event) {
[INFO] [stderr]   |                            ^^^^^ help: consider prefixing with an underscore: `_event`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/component.rs:10:25
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn debug(&mut self, s: String) {
[INFO] [stderr]    |                         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `msg`
[INFO] [stderr]   --> src/program.rs:32:38
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn dispatch(self: &Rc<Self>, msg: MSG) {
[INFO] [stderr]    |                                      ^^^ help: consider prefixing with an underscore: `_msg`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `type_alias_enum_variants` has been stable since 1.37.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(type_alias_enum_variants)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.48
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.48
[INFO] [stderr]     Checking wasm-bindgen v0.2.48
[INFO] [stderr]     Checking js-sys v0.3.25
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking wasm-bindgen-futures v0.3.25
[INFO] [stderr]     Checking wasm-bindgen-test v0.2.48
[INFO] [stderr] warning: unused imports: `Node`, `Widget`
[INFO] [stderr]  --> src/backend.rs:1:24
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::{Component, Node, Widget};
[INFO] [stderr]   |                        ^^^^  ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Node`
[INFO] [stderr]  --> src/program.rs:1:42
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::{backend::Backend, Component, Node};
[INFO] [stderr]   |                                          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `cell::RefCell`
[INFO] [stderr]  --> src/program.rs:2:11
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::{cell::RefCell, fmt::Debug, marker::PhantomData, rc::Rc};
[INFO] [stderr]   |           ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `event`
[INFO] [stderr]  --> src/component.rs:6:28
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn on_event(&mut self, event: Event) {
[INFO] [stderr]   |                            ^^^^^ help: consider prefixing with an underscore: `_event`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/component.rs:10:25
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn debug(&mut self, s: String) {
[INFO] [stderr]    |                         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `msg`
[INFO] [stderr]   --> src/program.rs:32:38
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn dispatch(self: &Rc<Self>, msg: MSG) {
[INFO] [stderr]    |                                      ^^^ help: consider prefixing with an underscore: `_msg`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `type_alias_enum_variants` has been stable since 1.37.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(type_alias_enum_variants)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.78s
[INFO] running `"docker" "inspect" "2542ded602b506c195d7a93d608d5437ed675865cbafe14cfc9881bfbaf42cbd"`
[INFO] running `"docker" "rm" "-f" "2542ded602b506c195d7a93d608d5437ed675865cbafe14cfc9881bfbaf42cbd"`
[INFO] [stdout] 2542ded602b506c195d7a93d608d5437ed675865cbafe14cfc9881bfbaf42cbd