[INFO] cloning repository https://github.com/T-Dark0/rust-string-into-chars-poc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/T-Dark0/rust-string-into-chars-poc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FT-Dark0%2Frust-string-into-chars-poc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FT-Dark0%2Frust-string-into-chars-poc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e3e88de17b027eb81225fb1f765097d03d5ae531
[INFO] testing T-Dark0/rust-string-into-chars-poc against master#595316b4006932405a63862d8fe65f71a6356293 for pr-128254
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FT-Dark0%2Frust-string-into-chars-poc" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/T-Dark0/rust-string-into-chars-poc on toolchain 595316b4006932405a63862d8fe65f71a6356293
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+595316b4006932405a63862d8fe65f71a6356293" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/T-Dark0/rust-string-into-chars-poc
[INFO] finished tweaking git repo https://github.com/T-Dark0/rust-string-into-chars-poc
[INFO] tweaked toml for git repo https://github.com/T-Dark0/rust-string-into-chars-poc written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/T-Dark0/rust-string-into-chars-poc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+595316b4006932405a63862d8fe65f71a6356293" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] testing T-Dark0/rust-string-into-chars-poc against try#5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b for pr-128254
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FT-Dark0%2Frust-string-into-chars-poc" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/T-Dark0/rust-string-into-chars-poc on toolchain 5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/T-Dark0/rust-string-into-chars-poc
[INFO] finished tweaking git repo https://github.com/T-Dark0/rust-string-into-chars-poc
[INFO] tweaked toml for git repo https://github.com/T-Dark0/rust-string-into-chars-poc written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/T-Dark0/rust-string-into-chars-poc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "fetch" "--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
[ERROR] error running command: no output for 300 seconds
[INFO] testing T-Dark0/rust-string-into-chars-poc against try#5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b for pr-128254
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FT-Dark0%2Frust-string-into-chars-poc" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/T-Dark0/rust-string-into-chars-poc on toolchain 5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/T-Dark0/rust-string-into-chars-poc
[INFO] finished tweaking git repo https://github.com/T-Dark0/rust-string-into-chars-poc
[INFO] tweaked toml for git repo https://github.com/T-Dark0/rust-string-into-chars-poc written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/T-Dark0/rust-string-into-chars-poc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "fetch" "--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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae9d1430db3d47fbad270f39c458b135b64e558a6bf3404703ab705122529532
[INFO] running `Command { std: "docker" "start" "-a" "ae9d1430db3d47fbad270f39c458b135b64e558a6bf3404703ab705122529532", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae9d1430db3d47fbad270f39c458b135b64e558a6bf3404703ab705122529532", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae9d1430db3d47fbad270f39c458b135b64e558a6bf3404703ab705122529532", kill_on_drop: false }`
[INFO] [stdout] ae9d1430db3d47fbad270f39c458b135b64e558a6bf3404703ab705122529532
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 498c53895fb68aa99b964da48b3b81d13ec186e75090c9e2c6516c7689b4cca6
[INFO] running `Command { std: "docker" "start" "-a" "498c53895fb68aa99b964da48b3b81d13ec186e75090c9e2c6516c7689b4cca6", kill_on_drop: false }`
[INFO] [stderr]    Compiling into_chars v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `assoc_char_funcs` has been stable since 1.52.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(assoc_char_funcs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StringIntoChars` is never constructed
[INFO] [stdout]  --> src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct StringIntoChars {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `into_chars` is never used
[INFO] [stdout]   --> src/lib.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn into_chars(string: String) -> StringIntoChars {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `next_code_point` is never used
[INFO] [stdout]  --> src/libstd_stolen/mod.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn next_code_point<I: Iterator<Item = u8>>(bytes: &mut I) -> Option<u32> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `next_code_point_reverse` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:35:15
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub(super) fn next_code_point_reverse<I>(bytes: &mut I) -> Option<u32>
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `utf8_is_cont_byte` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:68:15
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub(super) fn utf8_is_cont_byte(byte: u8) -> bool {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `utf8_first_byte` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn utf8_first_byte(byte: u8, width: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unwrap_or_0` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn unwrap_or_0(opt: Option<u8>) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `utf8_acc_cont_byte` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn utf8_acc_cont_byte(ch: u32, byte: u8) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CONT_MASK` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:95:7
[INFO] [stdout]    |
[INFO] [stdout] 95 | const CONT_MASK: u8 = 0b0011_1111;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_CONT_U8` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:98:7
[INFO] [stdout]    |
[INFO] [stdout] 98 | const TAG_CONT_U8: u8 = 0b1000_0000;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "498c53895fb68aa99b964da48b3b81d13ec186e75090c9e2c6516c7689b4cca6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "498c53895fb68aa99b964da48b3b81d13ec186e75090c9e2c6516c7689b4cca6", kill_on_drop: false }`
[INFO] [stdout] 498c53895fb68aa99b964da48b3b81d13ec186e75090c9e2c6516c7689b4cca6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af45d7deef01a8fa678ffcf2ff03f1972bcd413f63fd4e94a65606f6535f92e2
[INFO] running `Command { std: "docker" "start" "-a" "af45d7deef01a8fa678ffcf2ff03f1972bcd413f63fd4e94a65606f6535f92e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling into_chars v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `assoc_char_funcs` has been stable since 1.52.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(assoc_char_funcs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StringIntoChars` is never constructed
[INFO] [stdout]  --> src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct StringIntoChars {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `into_chars` is never used
[INFO] [stdout]   --> src/lib.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn into_chars(string: String) -> StringIntoChars {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `next_code_point` is never used
[INFO] [stdout]  --> src/libstd_stolen/mod.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn next_code_point<I: Iterator<Item = u8>>(bytes: &mut I) -> Option<u32> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `next_code_point_reverse` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:35:15
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub(super) fn next_code_point_reverse<I>(bytes: &mut I) -> Option<u32>
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `utf8_is_cont_byte` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:68:15
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub(super) fn utf8_is_cont_byte(byte: u8) -> bool {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `utf8_first_byte` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn utf8_first_byte(byte: u8, width: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unwrap_or_0` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn unwrap_or_0(opt: Option<u8>) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `utf8_acc_cont_byte` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn utf8_acc_cont_byte(ch: u32, byte: u8) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CONT_MASK` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:95:7
[INFO] [stdout]    |
[INFO] [stdout] 95 | const CONT_MASK: u8 = 0b0011_1111;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_CONT_U8` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:98:7
[INFO] [stdout]    |
[INFO] [stdout] 98 | const TAG_CONT_U8: u8 = 0b1000_0000;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `assoc_char_funcs` has been stable since 1.52.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(assoc_char_funcs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StringIntoChars` is never constructed
[INFO] [stdout]  --> src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct StringIntoChars {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `into_chars` is never used
[INFO] [stdout]   --> src/lib.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn into_chars(string: String) -> StringIntoChars {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `next_code_point` is never used
[INFO] [stdout]  --> src/libstd_stolen/mod.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn next_code_point<I: Iterator<Item = u8>>(bytes: &mut I) -> Option<u32> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `next_code_point_reverse` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:35:15
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub(super) fn next_code_point_reverse<I>(bytes: &mut I) -> Option<u32>
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `utf8_is_cont_byte` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:68:15
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub(super) fn utf8_is_cont_byte(byte: u8) -> bool {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `utf8_first_byte` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn utf8_first_byte(byte: u8, width: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unwrap_or_0` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn unwrap_or_0(opt: Option<u8>) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `utf8_acc_cont_byte` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn utf8_acc_cont_byte(ch: u32, byte: u8) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CONT_MASK` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:95:7
[INFO] [stdout]    |
[INFO] [stdout] 95 | const CONT_MASK: u8 = 0b0011_1111;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_CONT_U8` is never used
[INFO] [stdout]   --> src/libstd_stolen/mod.rs:98:7
[INFO] [stdout]    |
[INFO] [stdout] 98 | const TAG_CONT_U8: u8 = 0b1000_0000;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "af45d7deef01a8fa678ffcf2ff03f1972bcd413f63fd4e94a65606f6535f92e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af45d7deef01a8fa678ffcf2ff03f1972bcd413f63fd4e94a65606f6535f92e2", kill_on_drop: false }`
[INFO] [stdout] af45d7deef01a8fa678ffcf2ff03f1972bcd413f63fd4e94a65606f6535f92e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bd6eb259d554e5f22544e1c4c26ce67a190f52806de1fcc85b28cac015a4c695
[INFO] running `Command { std: "docker" "start" "-a" "bd6eb259d554e5f22544e1c4c26ce67a190f52806de1fcc85b28cac015a4c695", kill_on_drop: false }`
[INFO] [stderr] warning: the feature `assoc_char_funcs` has been stable since 1.52.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(assoc_char_funcs)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `StringIntoChars` is never constructed
[INFO] [stderr]  --> src/lib.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct StringIntoChars {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `into_chars` is never used
[INFO] [stderr]   --> src/lib.rs:57:4
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn into_chars(string: String) -> StringIntoChars {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `next_code_point` is never used
[INFO] [stderr]  --> src/libstd_stolen/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn next_code_point<I: Iterator<Item = u8>>(bytes: &mut I) -> Option<u32> {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `next_code_point_reverse` is never used
[INFO] [stderr]   --> src/libstd_stolen/mod.rs:35:15
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub(super) fn next_code_point_reverse<I>(bytes: &mut I) -> Option<u32>
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `utf8_is_cont_byte` is never used
[INFO] [stderr]   --> src/libstd_stolen/mod.rs:68:15
[INFO] [stderr]    |
[INFO] [stderr] 68 | pub(super) fn utf8_is_cont_byte(byte: u8) -> bool {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `utf8_first_byte` is never used
[INFO] [stderr]   --> src/libstd_stolen/mod.rs:76:4
[INFO] [stderr]    |
[INFO] [stderr] 76 | fn utf8_first_byte(byte: u8, width: u32) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `unwrap_or_0` is never used
[INFO] [stderr]   --> src/libstd_stolen/mod.rs:81:4
[INFO] [stderr]    |
[INFO] [stderr] 81 | fn unwrap_or_0(opt: Option<u8>) -> u8 {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `utf8_acc_cont_byte` is never used
[INFO] [stderr]   --> src/libstd_stolen/mod.rs:90:4
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn utf8_acc_cont_byte(ch: u32, byte: u8) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `CONT_MASK` is never used
[INFO] [stderr]   --> src/libstd_stolen/mod.rs:95:7
[INFO] [stderr]    |
[INFO] [stderr] 95 | const CONT_MASK: u8 = 0b0011_1111;
[INFO] [stderr]    |       ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `TAG_CONT_U8` is never used
[INFO] [stderr]   --> src/libstd_stolen/mod.rs:98:7
[INFO] [stderr]    |
[INFO] [stderr] 98 | const TAG_CONT_U8: u8 = 0b1000_0000;
[INFO] [stderr]    |       ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `into_chars` (lib) generated 11 warnings
[INFO] [stderr] warning: `into_chars` (lib test) generated 11 warnings (11 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/into_chars-31b1719723566067)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests into_chars
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bd6eb259d554e5f22544e1c4c26ce67a190f52806de1fcc85b28cac015a4c695", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd6eb259d554e5f22544e1c4c26ce67a190f52806de1fcc85b28cac015a4c695", kill_on_drop: false }`
[INFO] [stdout] bd6eb259d554e5f22544e1c4c26ce67a190f52806de1fcc85b28cac015a4c695