[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] checking T-Dark0/rust-string-into-chars-poc against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[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-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[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-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/T-Dark0/rust-string-into-chars-poc on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e2023d206f3a3f074d6f2796c8207764b4585a7638b16ce0a3ded6f3581d426
[INFO] running `Command { std: "docker" "start" "-a" "6e2023d206f3a3f074d6f2796c8207764b4585a7638b16ce0a3ded6f3581d426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e2023d206f3a3f074d6f2796c8207764b4585a7638b16ce0a3ded6f3581d426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e2023d206f3a3f074d6f2796c8207764b4585a7638b16ce0a3ded6f3581d426", kill_on_drop: false }`
[INFO] [stdout] 6e2023d206f3a3f074d6f2796c8207764b4585a7638b16ce0a3ded6f3581d426
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 331a4cca63d68a1ae821bb8219c382dfa97668073cfcaecd20404d23abee6645
[INFO] running `Command { std: "docker" "start" "-a" "331a4cca63d68a1ae821bb8219c382dfa97668073cfcaecd20404d23abee6645", kill_on_drop: false }`
[INFO] [stderr]     Checking 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)]` (part of `#[warn(unused)]`) 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: 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: 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: 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)]` (part of `#[warn(unused)]`) 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "331a4cca63d68a1ae821bb8219c382dfa97668073cfcaecd20404d23abee6645", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "331a4cca63d68a1ae821bb8219c382dfa97668073cfcaecd20404d23abee6645", kill_on_drop: false }`
[INFO] [stdout] 331a4cca63d68a1ae821bb8219c382dfa97668073cfcaecd20404d23abee6645
