[INFO] fetching crate kaos 0.1.1-alpha.2...
[INFO] checking kaos-0.1.1-alpha.2 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate kaos 0.1.1-alpha.2 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate kaos 0.1.1-alpha.2 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kaos 0.1.1-alpha.2
[INFO] finished tweaking crates.io crate kaos 0.1.1-alpha.2
[INFO] tweaked toml for crates.io crate kaos 0.1.1-alpha.2 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78871d8d23497ec5a27fb01d7094b0d928c2b2d69f04c859ed69b2701f11552f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "78871d8d23497ec5a27fb01d7094b0d928c2b2d69f04c859ed69b2701f11552f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78871d8d23497ec5a27fb01d7094b0d928c2b2d69f04c859ed69b2701f11552f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78871d8d23497ec5a27fb01d7094b0d928c2b2d69f04c859ed69b2701f11552f", kill_on_drop: false }`
[INFO] [stdout] 78871d8d23497ec5a27fb01d7094b0d928c2b2d69f04c859ed69b2701f11552f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 111e94e7c0269ad30695d0ec204e7a0dfc25696d8dc064fa74813c2e55d052c7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "111e94e7c0269ad30695d0ec204e7a0dfc25696d8dc064fa74813c2e55d052c7", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking bit-set v0.5.2
[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_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking fail v0.3.0
[INFO] [stderr]     Checking rusty-fork v0.2.2
[INFO] [stderr]     Checking proptest v0.9.6
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking kaos v0.1.1-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `OsStr`
[INFO] [stdout]  --> src/run.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ffi::{OsStr, OsString};
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Fail`, `Warn`
[INFO] [stdout]   --> src/run.rs:14:28
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::message::{self, Fail, Warn};
[INFO] [stdout]    |                            ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `OsStr`
[INFO] [stdout]  --> src/run.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ffi::{OsStr, OsString};
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Fail`, `Warn`
[INFO] [stdout]   --> src/run.rs:14:28
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::message::{self, Fail, Warn};
[INFO] [stdout]    |                            ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compute`
[INFO] [stdout]   --> src/diff.rs:72:16
[INFO] [stdout]    |
[INFO] [stdout] 72 |         pub fn compute(_expected: &str, _actual: &str) -> Option<Self> {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Mismatch`
[INFO] [stdout]   --> src/error.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Mismatch,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ReadStderr`
[INFO] [stdout]   --> src/error.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     ReadStderr(io::Error),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ShouldNotHaveCompiled`
[INFO] [stdout]   --> src/error.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     ShouldNotHaveCompiled,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `WriteStderr`
[INFO] [stdout]   --> src/error.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     WriteStderr(io::Error),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Level`
[INFO] [stdout]   --> src/message.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub(crate) enum Level {
[INFO] [stdout]    |                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `should_not_have_compiled`
[INFO] [stdout]   --> src/message.rs:90:15
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub(crate) fn should_not_have_compiled() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `write_stderr_wip`
[INFO] [stdout]   --> src/message.rs:99:15
[INFO] [stdout]    |
[INFO] [stdout] 99 | pub(crate) fn write_stderr_wip(wip_path: &Path, stderr_path: &Path, stderr: &str) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `overwrite_stderr`
[INFO] [stdout]    --> src/message.rs:117:15
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub(crate) fn overwrite_stderr(stderr_path: &Path, stderr: &str) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mismatch`
[INFO] [stdout]    --> src/message.rs:130:15
[INFO] [stdout]     |
[INFO] [stdout] 130 | pub(crate) fn mismatch(expected: &str, actual: &str) {
[INFO] [stdout]     |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fail_output`
[INFO] [stdout]    --> src/message.rs:195:15
[INFO] [stdout]     |
[INFO] [stdout] 195 | pub(crate) fn fail_output(level: Level, stdout: &[u8]) {
[INFO] [stdout]     |               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `any`
[INFO] [stdout]   --> src/normalize.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn any<F: FnMut(&str) -> bool>(&self, mut f: F) -> bool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compute`
[INFO] [stdout]   --> src/diff.rs:72:16
[INFO] [stdout]    |
[INFO] [stdout] 72 |         pub fn compute(_expected: &str, _actual: &str) -> Option<Self> {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Mismatch`
[INFO] [stdout]   --> src/error.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Mismatch,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ReadStderr`
[INFO] [stdout]   --> src/error.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     ReadStderr(io::Error),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ShouldNotHaveCompiled`
[INFO] [stdout]   --> src/error.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     ShouldNotHaveCompiled,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `WriteStderr`
[INFO] [stdout]   --> src/error.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     WriteStderr(io::Error),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Level`
[INFO] [stdout]   --> src/message.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub(crate) enum Level {
[INFO] [stdout]    |                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `should_not_have_compiled`
[INFO] [stdout]   --> src/message.rs:90:15
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub(crate) fn should_not_have_compiled() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `write_stderr_wip`
[INFO] [stdout]   --> src/message.rs:99:15
[INFO] [stdout]    |
[INFO] [stdout] 99 | pub(crate) fn write_stderr_wip(wip_path: &Path, stderr_path: &Path, stderr: &str) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `overwrite_stderr`
[INFO] [stdout]    --> src/message.rs:117:15
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub(crate) fn overwrite_stderr(stderr_path: &Path, stderr: &str) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mismatch`
[INFO] [stdout]    --> src/message.rs:130:15
[INFO] [stdout]     |
[INFO] [stdout] 130 | pub(crate) fn mismatch(expected: &str, actual: &str) {
[INFO] [stdout]     |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fail_output`
[INFO] [stdout]    --> src/message.rs:195:15
[INFO] [stdout]     |
[INFO] [stdout] 195 | pub(crate) fn fail_output(level: Level, stdout: &[u8]) {
[INFO] [stdout]     |               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `any`
[INFO] [stdout]   --> src/normalize.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn any<F: FnMut(&str) -> bool>(&self, mut f: F) -> bool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.72s
[INFO] running `Command { std: "docker" "inspect" "111e94e7c0269ad30695d0ec204e7a0dfc25696d8dc064fa74813c2e55d052c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "111e94e7c0269ad30695d0ec204e7a0dfc25696d8dc064fa74813c2e55d052c7", kill_on_drop: false }`
[INFO] [stdout] 111e94e7c0269ad30695d0ec204e7a0dfc25696d8dc064fa74813c2e55d052c7