[INFO] fetching crate ziptree 0.1.1...
[INFO] checking ziptree-0.1.1 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate ziptree 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate ziptree 0.1.1
[INFO] finished tweaking crates.io crate ziptree 0.1.1
[INFO] tweaked toml for crates.io crate ziptree 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ziptree 0.1.1 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] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 20 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.6.5 (available: v0.9.2)
[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] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[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] 116c5a741bc0bf377ada7d93dc617d71cf5075bbd95b3e1abeb654cccf87eec5
[INFO] running `Command { std: "docker" "start" "-a" "116c5a741bc0bf377ada7d93dc617d71cf5075bbd95b3e1abeb654cccf87eec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "116c5a741bc0bf377ada7d93dc617d71cf5075bbd95b3e1abeb654cccf87eec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "116c5a741bc0bf377ada7d93dc617d71cf5075bbd95b3e1abeb654cccf87eec5", kill_on_drop: false }`
[INFO] [stdout] 116c5a741bc0bf377ada7d93dc617d71cf5075bbd95b3e1abeb654cccf87eec5
[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] 34e33e63b155b4341b30637d6ebbe2fe6b7358676e7fdf16be8c9c908ea8b88b
[INFO] running `Command { std: "docker" "start" "-a" "34e33e63b155b4341b30637d6ebbe2fe6b7358676e7fdf16be8c9c908ea8b88b", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking ziptree v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `greater`
[INFO] [stdout]    --> src/lib.rs:422:34
[INFO] [stdout]     |
[INFO] [stdout] 422 | ...                   Some(greater) => {
[INFO] [stdout]     |                            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greater`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Iter<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 30 |     tree: &'a ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Iter` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct IterMut<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 37 |     tree: &'a mut ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct Keys<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 45 |     tree: &'a ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Keys` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct Values<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 53 |     tree: &'a ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Values` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub struct ValuesMut<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 60 |     tree: &'a mut ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `dump` is never used
[INFO] [stdout]    --> src/lib.rs:534:8
[INFO] [stdout]     |
[INFO] [stdout] 101 | / impl<K, V> ZipTree<K, V> where
[INFO] [stdout] 102 | |     K: Ord,
[INFO] [stdout]     | |___________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 534 |       fn dump(&self) where
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greater`
[INFO] [stdout]    --> src/lib.rs:422:34
[INFO] [stdout]     |
[INFO] [stdout] 422 | ...                   Some(greater) => {
[INFO] [stdout]     |                            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greater`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Iter<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 30 |     tree: &'a ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Iter` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct IterMut<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 37 |     tree: &'a mut ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct Keys<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 45 |     tree: &'a ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Keys` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct Values<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 53 |     tree: &'a ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Values` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tree` is never read
[INFO] [stdout]   --> src/lib.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub struct ValuesMut<'a, K: 'a, V: 'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 60 |     tree: &'a mut ZipTree<K, V>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `dump` is never used
[INFO] [stdout]    --> src/lib.rs:534:8
[INFO] [stdout]     |
[INFO] [stdout] 101 | / impl<K, V> ZipTree<K, V> where
[INFO] [stdout] 102 | |     K: Ord,
[INFO] [stdout]     | |___________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 534 |       fn dump(&self) where
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]  --> tests/simple.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashMap, BTreeMap};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.84s
[INFO] running `Command { std: "docker" "inspect" "34e33e63b155b4341b30637d6ebbe2fe6b7358676e7fdf16be8c9c908ea8b88b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34e33e63b155b4341b30637d6ebbe2fe6b7358676e7fdf16be8c9c908ea8b88b", kill_on_drop: false }`
[INFO] [stdout] 34e33e63b155b4341b30637d6ebbe2fe6b7358676e7fdf16be8c9c908ea8b88b