[INFO] cloning repository https://github.com/tsych0/cf_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tsych0/cf_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsych0%2Fcf_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsych0%2Fcf_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6ade7bfa67e9c689bc05431130d728a961e9bb3c
[INFO] checking tsych0/cf_rust against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsych0%2Fcf_rust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tsych0/cf_rust
[INFO] finished tweaking git repo https://github.com/tsych0/cf_rust
[INFO] tweaked toml for git repo https://github.com/tsych0/cf_rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tsych0/cf_rust 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 git repo https://github.com/tsych0/cf_rust 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a152d444849c96da743ef45bc557f9d5a307e29f0d1646a03d91b310788f4cf6
[INFO] running `Command { std: "docker" "start" "-a" "a152d444849c96da743ef45bc557f9d5a307e29f0d1646a03d91b310788f4cf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a152d444849c96da743ef45bc557f9d5a307e29f0d1646a03d91b310788f4cf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a152d444849c96da743ef45bc557f9d5a307e29f0d1646a03d91b310788f4cf6", kill_on_drop: false }`
[INFO] [stdout] a152d444849c96da743ef45bc557f9d5a307e29f0d1646a03d91b310788f4cf6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1f3a3de8b5aefb8e7f043b8114bd6f2aa9aaeddd7bac74bba503ef76b1d822c9
[INFO] running `Command { std: "docker" "start" "-a" "1f3a3de8b5aefb8e7f043b8114bd6f2aa9aaeddd7bac74bba503ef76b1d822c9", kill_on_drop: false }`
[INFO] [stderr]     Checking cp_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/btreemultimap.rs:291:17
[INFO] [stdout]     |
[INFO] [stdout] 291 |     pub fn iter(&self) -> MultiIter<K, V> {
[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] 291 |     pub fn iter(&self) -> MultiIter<'_, K, V> {
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/btreemultimap.rs:301:21
[INFO] [stdout]     |
[INFO] [stdout] 301 |     pub fn iter_mut(&mut self) -> MultiIterMut<K, V> {
[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] 301 |     pub fn iter_mut(&mut self) -> MultiIterMut<'_, K, V> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/btreemultimap.rs:311:18
[INFO] [stdout]     |
[INFO] [stdout] 311 |     pub fn entry(&mut self, k: K) -> Entry<K, V> {
[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] 311 |     pub fn entry(&mut self, k: K) -> Entry<'_, K, V> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib/indexmap.rs:64:18
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn entry(&mut self, key: K) -> Entry<K, V> {
[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] 64 |     pub fn entry(&mut self, key: K) -> Entry<'_, K, V> {
[INFO] [stdout]    |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<StaticModInt<M>, Infallible>
[INFO] [stdout]    --> src/lib/modint.rs:520:62
[INFO] [stdout]     |
[INFO] [stdout] 520 |               fn from_str(s: &str) -> Result<Self, Infallible> {
[INFO] [stdout]     |  ______________________________________________________________^
[INFO] [stdout] 521 | |                 Self::from_str_impl(s)
[INFO] [stdout] 522 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout] ...
[INFO] [stdout] 575 | / impl_basic_traits! {
[INFO] [stdout] 576 | |     impl <M: Modulus> _ for StaticModInt<M> ;
[INFO] [stdout] 577 | |     impl <I: Id     > _ for DynamicModInt<I>;
[INFO] [stdout] 578 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `impl_basic_traits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<StaticModInt<M>, Infallible>
[INFO] [stdout]    --> src/lib/modint.rs:521:17
[INFO] [stdout]     |
[INFO] [stdout] 521 |                   Self::from_str_impl(s)
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 575 | / impl_basic_traits! {
[INFO] [stdout] 576 | |     impl <M: Modulus> _ for StaticModInt<M> ;
[INFO] [stdout] 577 | |     impl <I: Id     > _ for DynamicModInt<I>;
[INFO] [stdout] 578 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `impl_basic_traits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<DynamicModInt<I>, Infallible>
[INFO] [stdout]    --> src/lib/modint.rs:520:62
[INFO] [stdout]     |
[INFO] [stdout] 520 |               fn from_str(s: &str) -> Result<Self, Infallible> {
[INFO] [stdout]     |  ______________________________________________________________^
[INFO] [stdout] 521 | |                 Self::from_str_impl(s)
[INFO] [stdout] 522 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout] ...
[INFO] [stdout] 575 | / impl_basic_traits! {
[INFO] [stdout] 576 | |     impl <M: Modulus> _ for StaticModInt<M> ;
[INFO] [stdout] 577 | |     impl <I: Id     > _ for DynamicModInt<I>;
[INFO] [stdout] 578 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `impl_basic_traits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<DynamicModInt<I>, Infallible>
[INFO] [stdout]    --> src/lib/modint.rs:521:17
[INFO] [stdout]     |
[INFO] [stdout] 521 |                   Self::from_str_impl(s)
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 575 | / impl_basic_traits! {
[INFO] [stdout] 576 | |     impl <M: Modulus> _ for StaticModInt<M> ;
[INFO] [stdout] 577 | |     impl <I: Id     > _ for DynamicModInt<I>;
[INFO] [stdout] 578 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `impl_basic_traits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:581:17
[INFO] [stdout]     |
[INFO] [stdout] 581 |     pub fn iter(&self) -> Iter<K, V> {
[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] 581 |     pub fn iter(&self) -> Iter<'_, K, V> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:616:21
[INFO] [stdout]     |
[INFO] [stdout] 616 |     pub fn iter_mut(&mut self) -> IterMut<K, V> {
[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] 616 |     pub fn iter_mut(&mut self) -> IterMut<'_, K, V> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:641:21
[INFO] [stdout]     |
[INFO] [stdout] 641 |     pub fn iter_all(&self) -> IterAll<K, Vec<V>> {
[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] 641 |     pub fn iter_all(&self) -> IterAll<'_, K, Vec<V>> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:670:25
[INFO] [stdout]     |
[INFO] [stdout] 670 |     pub fn iter_all_mut(&mut self) -> IterAllMut<K, Vec<V>> {
[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] 670 |     pub fn iter_all_mut(&mut self) -> IterAllMut<'_, K, Vec<V>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:750:18
[INFO] [stdout]     |
[INFO] [stdout] 750 |     pub fn entry(&mut self, k: K) -> Entry<K, V> {
[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] 750 |     pub fn entry(&mut self, k: K) -> Entry<'_, K, V> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cp_rust` (lib test) due to 4 previous errors; 9 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/btreemultimap.rs:291:17
[INFO] [stdout]     |
[INFO] [stdout] 291 |     pub fn iter(&self) -> MultiIter<K, V> {
[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] 291 |     pub fn iter(&self) -> MultiIter<'_, K, V> {
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/btreemultimap.rs:301:21
[INFO] [stdout]     |
[INFO] [stdout] 301 |     pub fn iter_mut(&mut self) -> MultiIterMut<K, V> {
[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] 301 |     pub fn iter_mut(&mut self) -> MultiIterMut<'_, K, V> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/btreemultimap.rs:311:18
[INFO] [stdout]     |
[INFO] [stdout] 311 |     pub fn entry(&mut self, k: K) -> Entry<K, V> {
[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] 311 |     pub fn entry(&mut self, k: K) -> Entry<'_, K, V> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib/indexmap.rs:64:18
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn entry(&mut self, key: K) -> Entry<K, V> {
[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] 64 |     pub fn entry(&mut self, key: K) -> Entry<'_, K, V> {
[INFO] [stdout]    |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<StaticModInt<M>, Infallible>
[INFO] [stdout]    --> src/lib/modint.rs:520:62
[INFO] [stdout]     |
[INFO] [stdout] 520 |               fn from_str(s: &str) -> Result<Self, Infallible> {
[INFO] [stdout]     |  ______________________________________________________________^
[INFO] [stdout] 521 | |                 Self::from_str_impl(s)
[INFO] [stdout] 522 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout] ...
[INFO] [stdout] 575 | / impl_basic_traits! {
[INFO] [stdout] 576 | |     impl <M: Modulus> _ for StaticModInt<M> ;
[INFO] [stdout] 577 | |     impl <I: Id     > _ for DynamicModInt<I>;
[INFO] [stdout] 578 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `impl_basic_traits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<StaticModInt<M>, Infallible>
[INFO] [stdout]    --> src/lib/modint.rs:521:17
[INFO] [stdout]     |
[INFO] [stdout] 521 |                   Self::from_str_impl(s)
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 575 | / impl_basic_traits! {
[INFO] [stdout] 576 | |     impl <M: Modulus> _ for StaticModInt<M> ;
[INFO] [stdout] 577 | |     impl <I: Id     > _ for DynamicModInt<I>;
[INFO] [stdout] 578 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `impl_basic_traits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<DynamicModInt<I>, Infallible>
[INFO] [stdout]    --> src/lib/modint.rs:520:62
[INFO] [stdout]     |
[INFO] [stdout] 520 |               fn from_str(s: &str) -> Result<Self, Infallible> {
[INFO] [stdout]     |  ______________________________________________________________^
[INFO] [stdout] 521 | |                 Self::from_str_impl(s)
[INFO] [stdout] 522 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout] ...
[INFO] [stdout] 575 | / impl_basic_traits! {
[INFO] [stdout] 576 | |     impl <M: Modulus> _ for StaticModInt<M> ;
[INFO] [stdout] 577 | |     impl <I: Id     > _ for DynamicModInt<I>;
[INFO] [stdout] 578 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `impl_basic_traits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<DynamicModInt<I>, Infallible>
[INFO] [stdout]    --> src/lib/modint.rs:521:17
[INFO] [stdout]     |
[INFO] [stdout] 521 |                   Self::from_str_impl(s)
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 575 | / impl_basic_traits! {
[INFO] [stdout] 576 | |     impl <M: Modulus> _ for StaticModInt<M> ;
[INFO] [stdout] 577 | |     impl <I: Id     > _ for DynamicModInt<I>;
[INFO] [stdout] 578 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `impl_basic_traits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:581:17
[INFO] [stdout]     |
[INFO] [stdout] 581 |     pub fn iter(&self) -> Iter<K, V> {
[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] 581 |     pub fn iter(&self) -> Iter<'_, K, V> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:616:21
[INFO] [stdout]     |
[INFO] [stdout] 616 |     pub fn iter_mut(&mut self) -> IterMut<K, V> {
[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] 616 |     pub fn iter_mut(&mut self) -> IterMut<'_, K, V> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:641:21
[INFO] [stdout]     |
[INFO] [stdout] 641 |     pub fn iter_all(&self) -> IterAll<K, Vec<V>> {
[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] 641 |     pub fn iter_all(&self) -> IterAll<'_, K, Vec<V>> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:670:25
[INFO] [stdout]     |
[INFO] [stdout] 670 |     pub fn iter_all_mut(&mut self) -> IterAllMut<K, Vec<V>> {
[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] 670 |     pub fn iter_all_mut(&mut self) -> IterAllMut<'_, K, Vec<V>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib/multimap.rs:750:18
[INFO] [stdout]     |
[INFO] [stdout] 750 |     pub fn entry(&mut self, k: K) -> Entry<K, V> {
[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] 750 |     pub fn entry(&mut self, k: K) -> Entry<'_, K, V> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cp_rust` (lib) due to 4 previous errors; 9 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1f3a3de8b5aefb8e7f043b8114bd6f2aa9aaeddd7bac74bba503ef76b1d822c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f3a3de8b5aefb8e7f043b8114bd6f2aa9aaeddd7bac74bba503ef76b1d822c9", kill_on_drop: false }`
[INFO] [stdout] 1f3a3de8b5aefb8e7f043b8114bd6f2aa9aaeddd7bac74bba503ef76b1d822c9