[INFO] fetching crate dltree 0.1.5...
[INFO] checking dltree-0.1.5 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate dltree 0.1.5 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate dltree 0.1.5
[INFO] finished tweaking crates.io crate dltree 0.1.5
[INFO] tweaked toml for crates.io crate dltree 0.1.5 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dltree 0.1.5 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb0bf07b57c32c7494ba2a596345b0f4b31aaa817ad9ff77c79090185ca4234f
[INFO] running `Command { std: "docker" "start" "-a" "eb0bf07b57c32c7494ba2a596345b0f4b31aaa817ad9ff77c79090185ca4234f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb0bf07b57c32c7494ba2a596345b0f4b31aaa817ad9ff77c79090185ca4234f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb0bf07b57c32c7494ba2a596345b0f4b31aaa817ad9ff77c79090185ca4234f", kill_on_drop: false }`
[INFO] [stdout] eb0bf07b57c32c7494ba2a596345b0f4b31aaa817ad9ff77c79090185ca4234f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a10ec18dc3c6a5f779ad34cc5baff7b3939e45f439e4e9359c1e9b23907384e9
[INFO] running `Command { std: "docker" "start" "-a" "a10ec18dc3c6a5f779ad34cc5baff7b3939e45f439e4e9359c1e9b23907384e9", kill_on_drop: false }`
[INFO] [stderr]     Checking dltree v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<T> {
[INFO] [stdout]    |                  ^^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<'_, T> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:51:22
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<T> {
[INFO] [stdout]    |                      ^^^^^^^^^     --------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:143:18
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn value(&self) -> Ref<LT> {
[INFO] [stdout]     |                  ^^^^^     ------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn value(&self) -> Ref<'_, LT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:147:22
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn value_mut(&self) -> RefMut<LT> {
[INFO] [stdout]     |                      ^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn value_mut(&self) -> RefMut<'_, LT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:168:18
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn value(&self) -> Ref<IT> {
[INFO] [stdout]     |                  ^^^^^     ------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn value(&self) -> Ref<'_, IT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:172:22
[INFO] [stdout]     |
[INFO] [stdout] 172 |     pub fn value_mut(&self) -> RefMut<IT> {
[INFO] [stdout]     |                      ^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 172 |     pub fn value_mut(&self) -> RefMut<'_, IT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<T> {
[INFO] [stdout]    |                  ^^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<'_, T> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:51:22
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<T> {
[INFO] [stdout]    |                      ^^^^^^^^^     --------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:143:18
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn value(&self) -> Ref<LT> {
[INFO] [stdout]     |                  ^^^^^     ------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn value(&self) -> Ref<'_, LT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:147:22
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn value_mut(&self) -> RefMut<LT> {
[INFO] [stdout]     |                      ^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn value_mut(&self) -> RefMut<'_, LT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:168:18
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn value(&self) -> Ref<IT> {
[INFO] [stdout]     |                  ^^^^^     ------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn value(&self) -> Ref<'_, IT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:172:22
[INFO] [stdout]     |
[INFO] [stdout] 172 |     pub fn value_mut(&self) -> RefMut<IT> {
[INFO] [stdout]     |                      ^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 172 |     pub fn value_mut(&self) -> RefMut<'_, IT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "a10ec18dc3c6a5f779ad34cc5baff7b3939e45f439e4e9359c1e9b23907384e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a10ec18dc3c6a5f779ad34cc5baff7b3939e45f439e4e9359c1e9b23907384e9", kill_on_drop: false }`
[INFO] [stdout] a10ec18dc3c6a5f779ad34cc5baff7b3939e45f439e4e9359c1e9b23907384e9