[INFO] fetching crate textos 0.0.3...
[INFO] checking textos-0.0.3 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate textos 0.0.3 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate textos 0.0.3
[INFO] finished tweaking crates.io crate textos 0.0.3
[INFO] tweaked toml for crates.io crate textos 0.0.3 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate textos 0.0.3 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate textos 0.0.3 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2fa6bb86763726b67114011871bb1886a233f580700f182080c5af1644603329
[INFO] running `Command { std: "docker" "start" "-a" "2fa6bb86763726b67114011871bb1886a233f580700f182080c5af1644603329", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fa6bb86763726b67114011871bb1886a233f580700f182080c5af1644603329", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fa6bb86763726b67114011871bb1886a233f580700f182080c5af1644603329", kill_on_drop: false }`
[INFO] [stdout] 2fa6bb86763726b67114011871bb1886a233f580700f182080c5af1644603329
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e11be126d0bbfa2347bcb7987f58cf72cf0c971f1186eb68771351c99ee08f4
[INFO] running `Command { std: "docker" "start" "-a" "5e11be126d0bbfa2347bcb7987f58cf72cf0c971f1186eb68771351c99ee08f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]     Checking rustc-std-workspace-std v1.0.1
[INFO] [stderr]    Compiling devela_macros v0.6.0
[INFO] [stderr]     Checking unicode-blocks v0.1.8
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]     Checking unicode-ident v1.0.11
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking unicode-script v0.5.5
[INFO] [stderr]     Checking unicode-truncate v0.2.0
[INFO] [stderr]     Checking devela v0.8.0
[INFO] [stderr]     Checking textos v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `no-std`
[INFO] [stdout]   --> src/lib.rs:12:28
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[cfg(all(feature = "std", feature = "no-std"))]
[INFO] [stdout]    |                            ^^^^^^^^^^--------
[INFO] [stdout]    |                                      |
[INFO] [stdout]    |                                      help: there is a expected value with a similar name: `"no_std"`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `alloc`, `default`, `nightly`, `nightly_docs`, `no_std`, `safe`, `safest`, `std`, `unsafe`, and `unsafest`
[INFO] [stdout]    = help: consider adding `no-std` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `no-std`
[INFO] [stdout]   --> src/lib.rs:12:28
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[cfg(all(feature = "std", feature = "no-std"))]
[INFO] [stdout]    |                            ^^^^^^^^^^--------
[INFO] [stdout]    |                                      |
[INFO] [stdout]    |                                      help: there is a expected value with a similar name: `"no_std"`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `alloc`, `default`, `nightly`, `nightly_docs`, `no_std`, `safe`, `safest`, `std`, `unsafe`, and `unsafest`
[INFO] [stdout]    = help: consider adding `no-std` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/unicode/egc/non_nul.rs:225:18
[INFO] [stdout]     |
[INFO] [stdout] 225 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]     |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 225 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/unicode/egc/string.rs:87:18
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]    |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]    |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/unicode/egc/u8string.rs:214:18
[INFO] [stdout]     |
[INFO] [stdout] 214 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]     |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 214 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/unicode/string/non_nul.rs:300:18
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]     |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/unicode/string/u8string.rs:300:18
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]     |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char24, Infallible>
[INFO] [stdout]   --> src/unicode/char/tests.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |     assert![Char24::try_from(c1).is_ok()];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char24, Infallible>
[INFO] [stdout]   --> src/unicode/char/tests.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |     assert![Char24::try_from(c2).is_ok()];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char24, Infallible>
[INFO] [stdout]   --> src/unicode/char/tests.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |     assert![Char24::try_from(c3).is_ok()];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char24, Infallible>
[INFO] [stdout]   --> src/unicode/char/tests.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |     assert![Char24::try_from(c4).is_ok()];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char32, Infallible>
[INFO] [stdout]   --> src/unicode/char/tests.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |     assert![Char32::try_from(c1).is_ok()];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char32, Infallible>
[INFO] [stdout]   --> src/unicode/char/tests.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |     assert![Char32::try_from(c2).is_ok()];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char32, Infallible>
[INFO] [stdout]   --> src/unicode/char/tests.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |     assert![Char32::try_from(c3).is_ok()];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char32, Infallible>
[INFO] [stdout]   --> src/unicode/char/tests.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |     assert![Char32::try_from(c4).is_ok()];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char32, Infallible>
[INFO] [stdout]    --> src/unicode/char/tests.rs:117:29
[INFO] [stdout]     |
[INFO] [stdout] 117 |     assert_eq![Char24::from(Char32::try_from(c4).unwrap()).to_char(), c4];
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char24, Infallible>
[INFO] [stdout]    --> src/unicode/char/tests.rs:123:29
[INFO] [stdout]     |
[INFO] [stdout] 123 |     assert_eq![Char32::from(Char24::try_from(c3).unwrap()).to_char(), c3];
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<unicode::char::Char24, Infallible>
[INFO] [stdout]    --> src/unicode/char/tests.rs:124:29
[INFO] [stdout]     |
[INFO] [stdout] 124 |     assert_eq![Char32::from(Char24::try_from(c4).unwrap()).to_char(), c4];
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/unicode/egc/non_nul.rs:225:18
[INFO] [stdout]     |
[INFO] [stdout] 225 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]     |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 225 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/unicode/egc/string.rs:87:18
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]    |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]    |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/unicode/egc/u8string.rs:214:18
[INFO] [stdout]     |
[INFO] [stdout] 214 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]     |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 214 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/unicode/string/non_nul.rs:300:18
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]     |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/unicode/string/u8string.rs:300:18
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub fn chars(&self) -> Chars {
[INFO] [stdout]     |                  ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub fn chars(&self) -> Chars<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `textos` (lib test) due to 11 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5e11be126d0bbfa2347bcb7987f58cf72cf0c971f1186eb68771351c99ee08f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e11be126d0bbfa2347bcb7987f58cf72cf0c971f1186eb68771351c99ee08f4", kill_on_drop: false }`
[INFO] [stdout] 5e11be126d0bbfa2347bcb7987f58cf72cf0c971f1186eb68771351c99ee08f4
