[INFO] fetching crate mutf8 0.5.0...
[INFO] building mutf8-0.5.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate mutf8 0.5.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate mutf8 0.5.0
[INFO] finished tweaking crates.io crate mutf8 0.5.0
[INFO] tweaked toml for crates.io crate mutf8 0.5.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mutf8 0.5.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 320b35dc730d407fdb27dd39713760a4f8c208cc8dae62891d39a8751242adda
[INFO] running `Command { std: "docker" "start" "-a" "320b35dc730d407fdb27dd39713760a4f8c208cc8dae62891d39a8751242adda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "320b35dc730d407fdb27dd39713760a4f8c208cc8dae62891d39a8751242adda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "320b35dc730d407fdb27dd39713760a4f8c208cc8dae62891d39a8751242adda", kill_on_drop: false }`
[INFO] [stdout] 320b35dc730d407fdb27dd39713760a4f8c208cc8dae62891d39a8751242adda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf548c76cc30a28fe55f83dd2803276a651955373e457c93ccc3c8e4d9844591
[INFO] running `Command { std: "docker" "start" "-a" "bf548c76cc30a28fe55f83dd2803276a651955373e457c93ccc3c8e4d9844591", kill_on_drop: false }`
[INFO] [stderr]    Compiling mutf8 v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/mutf8.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn utf8_to_mutf8(input: &[u8]) -> Result<Cow<[u8]>> {
[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] 5 | pub fn utf8_to_mutf8(input: &[u8]) -> Result<Cow<'_, [u8]>> {
[INFO] [stdout]   |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/mutf8.rs:100:29
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub fn mutf8_to_utf8(input: &[u8]) -> Result<Cow<[u8]>> {
[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] 100 | pub fn mutf8_to_utf8(input: &[u8]) -> Result<Cow<'_, [u8]>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:103:23
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn as_utf8_bytes(&self) -> MResult<Cow<[u8]>> {
[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] 103 |     pub fn as_utf8_bytes(&self) -> MResult<Cow<'_, [u8]>> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:194:26
[INFO] [stdout]     |
[INFO] [stdout] 194 |     pub fn from_utf8(bytes: &[u8]) -> MResult<Cow<mstr>> {
[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] 194 |     pub fn from_utf8(bytes: &[u8]) -> MResult<Cow<'_, mstr>> {
[INFO] [stdout]     |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:246:16
[INFO] [stdout]     |
[INFO] [stdout] 246 |     pub fn to_str(&self) -> MResult<Cow<str>> {
[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] 246 |     pub fn to_str(&self) -> MResult<Cow<'_, str>> {
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:250:17
[INFO] [stdout]     |
[INFO] [stdout] 250 |     pub fn to_utf8(&self) -> MResult<Cow<str>> {
[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] 250 |     pub fn to_utf8(&self) -> MResult<Cow<'_, str>> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "bf548c76cc30a28fe55f83dd2803276a651955373e457c93ccc3c8e4d9844591", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf548c76cc30a28fe55f83dd2803276a651955373e457c93ccc3c8e4d9844591", kill_on_drop: false }`
[INFO] [stdout] bf548c76cc30a28fe55f83dd2803276a651955373e457c93ccc3c8e4d9844591
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fed7553bb42f14dace6bc40a24be0c719b4942223daa5bca67e95757349e879c
[INFO] running `Command { std: "docker" "start" "-a" "fed7553bb42f14dace6bc40a24be0c719b4942223daa5bca67e95757349e879c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/mutf8.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn utf8_to_mutf8(input: &[u8]) -> Result<Cow<[u8]>> {
[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] 5 | pub fn utf8_to_mutf8(input: &[u8]) -> Result<Cow<'_, [u8]>> {
[INFO] [stdout]   |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/mutf8.rs:100:29
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub fn mutf8_to_utf8(input: &[u8]) -> Result<Cow<[u8]>> {
[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] 100 | pub fn mutf8_to_utf8(input: &[u8]) -> Result<Cow<'_, [u8]>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:103:23
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn as_utf8_bytes(&self) -> MResult<Cow<[u8]>> {
[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] 103 |     pub fn as_utf8_bytes(&self) -> MResult<Cow<'_, [u8]>> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:194:26
[INFO] [stdout]     |
[INFO] [stdout] 194 |     pub fn from_utf8(bytes: &[u8]) -> MResult<Cow<mstr>> {
[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] 194 |     pub fn from_utf8(bytes: &[u8]) -> MResult<Cow<'_, mstr>> {
[INFO] [stdout]     |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:246:16
[INFO] [stdout]     |
[INFO] [stdout] 246 |     pub fn to_str(&self) -> MResult<Cow<str>> {
[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] 246 |     pub fn to_str(&self) -> MResult<Cow<'_, str>> {
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:250:17
[INFO] [stdout]     |
[INFO] [stdout] 250 |     pub fn to_utf8(&self) -> MResult<Cow<str>> {
[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] 250 |     pub fn to_utf8(&self) -> MResult<Cow<'_, str>> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling mutf8 v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `mutf8::mutf8_to_utf8`
[INFO] [stdout]  --> tests/to_mutf8.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use mutf8::mutf8_to_utf8;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/mutf8.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn utf8_to_mutf8(input: &[u8]) -> Result<Cow<[u8]>> {
[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] 5 | pub fn utf8_to_mutf8(input: &[u8]) -> Result<Cow<'_, [u8]>> {
[INFO] [stdout]   |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/mutf8.rs:100:29
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub fn mutf8_to_utf8(input: &[u8]) -> Result<Cow<[u8]>> {
[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] 100 | pub fn mutf8_to_utf8(input: &[u8]) -> Result<Cow<'_, [u8]>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:103:23
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn as_utf8_bytes(&self) -> MResult<Cow<[u8]>> {
[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] 103 |     pub fn as_utf8_bytes(&self) -> MResult<Cow<'_, [u8]>> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:194:26
[INFO] [stdout]     |
[INFO] [stdout] 194 |     pub fn from_utf8(bytes: &[u8]) -> MResult<Cow<mstr>> {
[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] 194 |     pub fn from_utf8(bytes: &[u8]) -> MResult<Cow<'_, mstr>> {
[INFO] [stdout]     |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:246:16
[INFO] [stdout]     |
[INFO] [stdout] 246 |     pub fn to_str(&self) -> MResult<Cow<str>> {
[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] 246 |     pub fn to_str(&self) -> MResult<Cow<'_, str>> {
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/str.rs:250:17
[INFO] [stdout]     |
[INFO] [stdout] 250 |     pub fn to_utf8(&self) -> MResult<Cow<str>> {
[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] 250 |     pub fn to_utf8(&self) -> MResult<Cow<'_, str>> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 9.47s
[INFO] running `Command { std: "docker" "inspect" "fed7553bb42f14dace6bc40a24be0c719b4942223daa5bca67e95757349e879c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fed7553bb42f14dace6bc40a24be0c719b4942223daa5bca67e95757349e879c", kill_on_drop: false }`
[INFO] [stdout] fed7553bb42f14dace6bc40a24be0c719b4942223daa5bca67e95757349e879c