[INFO] fetching crate derivation_tree 0.1.0...
[INFO] checking derivation_tree-0.1.0 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate derivation_tree 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate derivation_tree 0.1.0
[INFO] finished tweaking crates.io crate derivation_tree 0.1.0
[INFO] tweaked toml for crates.io crate derivation_tree 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate derivation_tree 0.1.0 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ded154eda7cf3464852ee075f4f3df2038aa476d775c284e3891b9d8993b6d8c
[INFO] running `Command { std: "docker" "start" "-a" "ded154eda7cf3464852ee075f4f3df2038aa476d775c284e3891b9d8993b6d8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ded154eda7cf3464852ee075f4f3df2038aa476d775c284e3891b9d8993b6d8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ded154eda7cf3464852ee075f4f3df2038aa476d775c284e3891b9d8993b6d8c", kill_on_drop: false }`
[INFO] [stdout] ded154eda7cf3464852ee075f4f3df2038aa476d775c284e3891b9d8993b6d8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8dbd18f16aae7d843890096d3f47ed930601cf99ec61cc6db9a39000e7cf5f71
[INFO] running `Command { std: "docker" "start" "-a" "8dbd18f16aae7d843890096d3f47ed930601cf99ec61cc6db9a39000e7cf5f71", kill_on_drop: false }`
[INFO] [stderr]     Checking derivation_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/derivation.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn new(mut term: T, query: F) -> Self {
[INFO] [stdout]    |                ----^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/heuristic.rs:24:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn apply(&self, index: usize, tree: &DerivationTree<T>) -> Range<usize> {
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree`
[INFO] [stdout]   --> src/heuristic.rs:24:35
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn apply(&self, index: usize, tree: &DerivationTree<T>) -> Range<usize> {
[INFO] [stdout]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term`
[INFO] [stdout]   --> src/tree.rs:28:24
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn push(&self, term: T, parent: usize) -> usize {
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_term`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/tree.rs:28:33
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn push(&self, term: T, parent: usize) -> usize {
[INFO] [stdout]    |                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `heuristic` is never read
[INFO] [stdout]   --> src/derivation.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub struct Derivation<F,T,H = DefaultDerivationHeuristic<T>>
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 18 |     heuristic: H,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/derivation.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn new(mut term: T, query: F) -> Self {
[INFO] [stdout]    |                ----^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/heuristic.rs:24:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn apply(&self, index: usize, tree: &DerivationTree<T>) -> Range<usize> {
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree`
[INFO] [stdout]   --> src/heuristic.rs:24:35
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn apply(&self, index: usize, tree: &DerivationTree<T>) -> Range<usize> {
[INFO] [stdout]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term`
[INFO] [stdout]   --> src/tree.rs:28:24
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn push(&self, term: T, parent: usize) -> usize {
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_term`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/tree.rs:28:33
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn push(&self, term: T, parent: usize) -> usize {
[INFO] [stdout]    |                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `heuristic` is never read
[INFO] [stdout]   --> src/derivation.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub struct Derivation<F,T,H = DefaultDerivationHeuristic<T>>
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 18 |     heuristic: H,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "8dbd18f16aae7d843890096d3f47ed930601cf99ec61cc6db9a39000e7cf5f71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dbd18f16aae7d843890096d3f47ed930601cf99ec61cc6db9a39000e7cf5f71", kill_on_drop: false }`
[INFO] [stdout] 8dbd18f16aae7d843890096d3f47ed930601cf99ec61cc6db9a39000e7cf5f71