[INFO] crate amadeus 0.1.6 is already in cache
[INFO] checking amadeus-0.1.6 against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] extracting crate amadeus 0.1.6 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate amadeus 0.1.6 on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate amadeus 0.1.6
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate amadeus 0.1.6
[INFO] tweaked toml for crates.io crate amadeus 0.1.6 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate amadeus 0.1.6 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8ce5f455515c6a61c5dac05057d61f6544d99d8b19423c1c8fc62e830fe0db0f
[INFO] running `"docker" "start" "-a" "8ce5f455515c6a61c5dac05057d61f6544d99d8b19423c1c8fc62e830fe0db0f"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]    Compiling syn v1.0.12
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling heapless v0.5.1
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling build_id v0.2.1
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]     Checking once_cell v1.2.0
[INFO] [stderr]     Checking smallvec v1.1.0
[INFO] [stderr]     Checking delegate v0.1.3
[INFO] [stderr]    Compiling relative v0.2.2
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking replace_with v0.1.5
[INFO] [stderr]     Checking metatype v0.2.0
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking owned_chars v0.3.0
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]     Checking unicode-normalization v0.1.11
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]    Compiling procinfo v0.4.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking as-slice v0.1.2
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling parse-zoneinfo v0.2.1
[INFO] [stderr]     Checking twox-hash v1.5.0
[INFO] [stderr]    Compiling chrono-tz v0.5.1
[INFO] [stderr]     Checking palaver v0.2.8
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling amadeus-derive v0.1.6
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]    Compiling serde_closure_derive v0.2.9
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking streaming_algorithms v0.1.1
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking sum v0.1.3
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[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking serde_traitobject v0.2.4
[INFO] [stderr]     Checking amadeus-core v0.1.6
[INFO] [stderr]     Checking amadeus-types v0.1.6
[INFO] [stderr]     Checking amadeus v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `move`, `move`, `move`
[INFO] [stderr]   --> tests/threads.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |             pool.spawn(FnOnce!(move || -> String {
[INFO] [stderr]    |                                ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `move`
[INFO] [stderr]   --> tests/threads.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |             pool.spawn(FnOnce!(move || -> String {
[INFO] [stderr]    |                                ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: type parameter `__SERDE_CLOSURE_A` should have an upper camel case name
[INFO] [stderr]   --> tests/threads.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |             pool.spawn(FnOnce!(move || -> String {
[INFO] [stderr]    |                                ^^^^ help: convert the identifier to upper camel case: `SerdeClosureA`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: type parameter `__SERDE_CLOSURE_A` should have an upper camel case name
[INFO] [stderr]   --> tests/threads.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |             pool.spawn(FnOnce!(move || -> String {
[INFO] [stderr]    |                                ^^^^ help: convert the identifier to upper camel case: `SerdeClosureA`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `|`, `|`, `|`
[INFO] [stderr]   --> tests/panic.rs:47:11
[INFO] [stderr]    |
[INFO] [stderr] 47 |             FnMut!(|i| if i == 500 {
[INFO] [stderr]    |                    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `|`
[INFO] [stderr]   --> tests/panic.rs:47:11
[INFO] [stderr]    |
[INFO] [stderr] 47 |             FnMut!(|i| if i == 500 {
[INFO] [stderr]    |                    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `|`, `|`, `|`
[INFO] [stderr]  --> tests/into_dist_iter.rs:9:15
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .map(FnMut!(|a: usize| a))
[INFO] [stderr]   |                     ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `|`
[INFO] [stderr]  --> tests/into_dist_iter.rs:9:15
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .map(FnMut!(|a: usize| a))
[INFO] [stderr]   |                     ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `|`, `|`, `|`
[INFO] [stderr]   --> tests/into_dist_iter.rs:10:27
[INFO] [stderr]    |
[INFO] [stderr] 10 |         .for_each(&pool, FnMut!(|a: usize| println!("{:?}", a)));
[INFO] [stderr]    |                                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `|`
[INFO] [stderr]   --> tests/into_dist_iter.rs:10:27
[INFO] [stderr]    |
[INFO] [stderr] 10 |         .for_each(&pool, FnMut!(|a: usize| println!("{:?}", a)));
[INFO] [stderr]    |                                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `||`, `||`, `||`
[INFO] [stderr]   --> tests/into_dist_iter.rs:22:11
[INFO] [stderr]    |
[INFO] [stderr] 22 |             FnMut!(|| 0usize),
[INFO] [stderr]    |                    ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `||`
[INFO] [stderr]   --> tests/into_dist_iter.rs:22:11
[INFO] [stderr]    |
[INFO] [stderr] 22 |             FnMut!(|| 0usize),
[INFO] [stderr]    |                    ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `|`, `|`, `|`
[INFO] [stderr]   --> tests/into_dist_iter.rs:23:11
[INFO] [stderr]    |
[INFO] [stderr] 23 |             FnMut!(|a: usize, b: Either<usize, usize>| a + b.into_inner()),
[INFO] [stderr]    |                    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `|`
[INFO] [stderr]   --> tests/into_dist_iter.rs:23:11
[INFO] [stderr]    |
[INFO] [stderr] 23 |             FnMut!(|a: usize, b: Either<usize, usize>| a + b.into_inner()),
[INFO] [stderr]    |                    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> tests/threads.rs:49:55
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 let mut rng = rand::rngs::SmallRng::seed_from_u64(i.try_into().unwrap());
[INFO] [stderr]    |                                                                   ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> tests/threads.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |             pool.spawn(FnOnce!(move || -> String {
[INFO] [stderr]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> tests/threads.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |             pool.spawn(FnOnce!(move || -> String {
[INFO] [stderr]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/threads.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |               pool.spawn(FnOnce!(move || -> String {
[INFO] [stderr]    |                                  ^----
[INFO] [stderr]    |                                  |
[INFO] [stderr]    |  ________________________________help: remove this `mut`
[INFO] [stderr]    | |
[INFO] [stderr] 49 | |                 let mut rng = rand::rngs::SmallRng::seed_from_u64(i.try_into().unwrap());
[INFO] [stderr]    | |___________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> tests/panic.rs:47:11
[INFO] [stderr]    |
[INFO] [stderr] 47 |             FnMut!(|i| if i == 500 {
[INFO] [stderr]    |                    ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> tests/panic.rs:47:11
[INFO] [stderr]    |
[INFO] [stderr] 47 |             FnMut!(|i| if i == 500 {
[INFO] [stderr]    |                    ^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `state`
[INFO] [stderr]   --> tests/panic.rs:47:11
[INFO] [stderr]    |
[INFO] [stderr] 47 |             FnMut!(|i| if i == 500 {
[INFO] [stderr]    |                    ^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `strip_f_ref`
[INFO] [stderr]   --> tests/threads.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |             pool.spawn(FnOnce!(move || -> String {
[INFO] [stderr]    |                                ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `strip_f_mut`
[INFO] [stderr]   --> tests/threads.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |             pool.spawn(FnOnce!(move || -> String {
[INFO] [stderr]    |                                ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/panic.rs:47:11
[INFO] [stderr]    |
[INFO] [stderr] 47 |             FnMut!(|i| if i == 500 {
[INFO] [stderr]    |                    ^ help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/panic.rs:47:11
[INFO] [stderr]    |
[INFO] [stderr] 47 |             FnMut!(|i| if i == 500 {
[INFO] [stderr]    |                    ^ help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `strip_f_ref`
[INFO] [stderr]   --> tests/panic.rs:47:11
[INFO] [stderr]    |
[INFO] [stderr] 47 |             FnMut!(|i| if i == 500 {
[INFO] [stderr]    |                    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]  --> tests/into_dist_iter.rs:9:15
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .map(FnMut!(|a: usize| a))
[INFO] [stderr]   |                     ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]  --> tests/into_dist_iter.rs:9:15
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .map(FnMut!(|a: usize| a))
[INFO] [stderr]   |                     ^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr]   |
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `state`
[INFO] [stderr]  --> tests/into_dist_iter.rs:9:15
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .map(FnMut!(|a: usize| a))
[INFO] [stderr]   |                     ^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stderr]   |
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> tests/into_dist_iter.rs:10:27
[INFO] [stderr]    |
[INFO] [stderr] 10 |         .for_each(&pool, FnMut!(|a: usize| println!("{:?}", a)));
[INFO] [stderr]    |                                 ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> tests/into_dist_iter.rs:10:27
[INFO] [stderr]    |
[INFO] [stderr] 10 |         .for_each(&pool, FnMut!(|a: usize| println!("{:?}", a)));
[INFO] [stderr]    |                                 ^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `state`
[INFO] [stderr]   --> tests/into_dist_iter.rs:10:27
[INFO] [stderr]    |
[INFO] [stderr] 10 |         .for_each(&pool, FnMut!(|a: usize| println!("{:?}", a)));
[INFO] [stderr]    |                                 ^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> tests/into_dist_iter.rs:22:11
[INFO] [stderr]    |
[INFO] [stderr] 22 |             FnMut!(|| 0usize),
[INFO] [stderr]    |                    ^^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> tests/into_dist_iter.rs:22:11
[INFO] [stderr]    |
[INFO] [stderr] 22 |             FnMut!(|| 0usize),
[INFO] [stderr]    |                    ^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `state`
[INFO] [stderr]   --> tests/into_dist_iter.rs:22:11
[INFO] [stderr]    |
[INFO] [stderr] 22 |             FnMut!(|| 0usize),
[INFO] [stderr]    |                    ^^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> tests/into_dist_iter.rs:23:11
[INFO] [stderr]    |
[INFO] [stderr] 23 |             FnMut!(|a: usize, b: Either<usize, usize>| a + b.into_inner()),
[INFO] [stderr]    |                    ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> tests/into_dist_iter.rs:23:11
[INFO] [stderr]    |
[INFO] [stderr] 23 |             FnMut!(|a: usize, b: Either<usize, usize>| a + b.into_inner()),
[INFO] [stderr]    |                    ^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `state`
[INFO] [stderr]   --> tests/into_dist_iter.rs:23:11
[INFO] [stderr]    |
[INFO] [stderr] 23 |             FnMut!(|a: usize, b: Either<usize, usize>| a + b.into_inner()),
[INFO] [stderr]    |                    ^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> tests/into_dist_iter.rs:9:15
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .map(FnMut!(|a: usize| a))
[INFO] [stderr]   |                     ^ help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> tests/into_dist_iter.rs:9:15
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .map(FnMut!(|a: usize| a))
[INFO] [stderr]   |                     ^ help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/into_dist_iter.rs:10:27
[INFO] [stderr]    |
[INFO] [stderr] 10 |         .for_each(&pool, FnMut!(|a: usize| println!("{:?}", a)));
[INFO] [stderr]    |                                 ^ help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/into_dist_iter.rs:22:11
[INFO] [stderr]    |
[INFO] [stderr] 22 |             FnMut!(|| 0usize),
[INFO] [stderr]    |                    ^^ help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/into_dist_iter.rs:23:11
[INFO] [stderr]    |
[INFO] [stderr] 23 |             FnMut!(|a: usize, b: Either<usize, usize>| a + b.into_inner()),
[INFO] [stderr]    |                    ^ help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `strip_f_ref`
[INFO] [stderr]  --> tests/into_dist_iter.rs:9:15
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .map(FnMut!(|a: usize| a))
[INFO] [stderr]   |                     ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `strip_f_ref`
[INFO] [stderr]   --> tests/into_dist_iter.rs:10:27
[INFO] [stderr]    |
[INFO] [stderr] 10 |         .for_each(&pool, FnMut!(|a: usize| println!("{:?}", a)));
[INFO] [stderr]    |                                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `strip_f_ref`
[INFO] [stderr]   --> tests/into_dist_iter.rs:22:11
[INFO] [stderr]    |
[INFO] [stderr] 22 |             FnMut!(|| 0usize),
[INFO] [stderr]    |                    ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `strip_f_ref`
[INFO] [stderr]   --> tests/into_dist_iter.rs:23:11
[INFO] [stderr]    |
[INFO] [stderr] 23 |             FnMut!(|a: usize, b: Either<usize, usize>| a + b.into_inner()),
[INFO] [stderr]    |                    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 47s
[INFO] running `"docker" "inspect" "8ce5f455515c6a61c5dac05057d61f6544d99d8b19423c1c8fc62e830fe0db0f"`
[INFO] running `"docker" "rm" "-f" "8ce5f455515c6a61c5dac05057d61f6544d99d8b19423c1c8fc62e830fe0db0f"`
[INFO] [stdout] 8ce5f455515c6a61c5dac05057d61f6544d99d8b19423c1c8fc62e830fe0db0f
