[INFO] fetching crate sandpit 0.3.0... [INFO] building sandpit-0.3.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2 [INFO] extracting crate sandpit 0.3.0 into /workspace/builds/worker-6-tc1/source [INFO] started tweaking crates.io crate sandpit 0.3.0 [INFO] removed 0 missing examples [INFO] removed 0 missing tests [INFO] finished tweaking crates.io crate sandpit 0.3.0 [INFO] tweaked toml for crates.io crate sandpit 0.3.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate sandpit 0.3.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate sandpit 0.3.0 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded plotters-backend v0.3.6 [INFO] [stderr] Downloaded higher-kinded-types v0.1.1 [INFO] [stderr] Downloaded nimix v0.1.0 [INFO] [stderr] Downloaded sandpit_derive v0.3.0 [INFO] [stderr] Downloaded plotters-svg v0.3.6 [INFO] [stderr] Downloaded never-say-never v6.6.666 [INFO] [stderr] Downloaded plotters v0.3.6 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 6a5f79271bc8df16166663a82e29fde9ae1fa5d33a227402a3beceb4e02b43a4 [INFO] running `Command { std: "docker" "start" "-a" "6a5f79271bc8df16166663a82e29fde9ae1fa5d33a227402a3beceb4e02b43a4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6a5f79271bc8df16166663a82e29fde9ae1fa5d33a227402a3beceb4e02b43a4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6a5f79271bc8df16166663a82e29fde9ae1fa5d33a227402a3beceb4e02b43a4", kill_on_drop: false }` [INFO] [stdout] 6a5f79271bc8df16166663a82e29fde9ae1fa5d33a227402a3beceb4e02b43a4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 95c46ceb058c14c0573680fcea655bfb97763d92330599409072f166a5ed866a [INFO] running `Command { std: "docker" "start" "-a" "95c46ceb058c14c0573680fcea655bfb97763d92330599409072f166a5ed866a", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.81 [INFO] [stderr] Compiling crossbeam-utils v0.8.20 [INFO] [stderr] Compiling never-say-never v6.6.666 [INFO] [stderr] Compiling nimix v0.1.0 [INFO] [stderr] Compiling higher-kinded-types v0.1.1 [INFO] [stderr] Compiling crossbeam-channel v0.5.13 [INFO] [stderr] Compiling quote v1.0.36 [INFO] [stderr] Compiling syn v2.0.60 [INFO] [stderr] Compiling sandpit_derive v0.3.0 [INFO] [stderr] Compiling sandpit v0.3.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/barrier.rs:146:17 [INFO] [stdout] | [INFO] [stdout] 146 | pub fn into(&self) -> Option> { [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] 146 | pub fn into(&self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/collector.rs:211:20 [INFO] [stdout] | [INFO] [stdout] 211 | fn new_mutator(&self) -> Mutator { [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] 211 | fn new_mutator(&self) -> Mutator<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/trace/tracer_controller.rs:80:23 [INFO] [stdout] | [INFO] [stdout] 80 | pub fn yield_lock(&self) -> RwLockReadGuard<()> { [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] 80 | pub fn yield_lock(&self) -> RwLockReadGuard<'_, ()> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/trace/tracer_controller.rs:84:32 [INFO] [stdout] | [INFO] [stdout] 84 | pub fn get_time_slice_lock(&self) -> MutexGuard<()> { [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] 84 | pub fn get_time_slice_lock(&self) -> MutexGuard<'_, ()> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.52s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: higher-kinded-types v0.1.1 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2` [INFO] running `Command { std: "docker" "inspect" "95c46ceb058c14c0573680fcea655bfb97763d92330599409072f166a5ed866a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "95c46ceb058c14c0573680fcea655bfb97763d92330599409072f166a5ed866a", kill_on_drop: false }` [INFO] [stdout] 95c46ceb058c14c0573680fcea655bfb97763d92330599409072f166a5ed866a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 59e9dc04fc925e85f332cd5648a8aa25b571d37a164549933735b06cf7478f2a [INFO] running `Command { std: "docker" "start" "-a" "59e9dc04fc925e85f332cd5648a8aa25b571d37a164549933735b06cf7478f2a", kill_on_drop: false }` [INFO] [stderr] Compiling serde v1.0.203 [INFO] [stderr] Compiling serde_json v1.0.117 [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling either v1.12.0 [INFO] [stderr] Compiling getrandom v0.2.15 [INFO] [stderr] Compiling serde_derive v1.0.203 [INFO] [stderr] Compiling zerocopy-derive v0.7.35 [INFO] [stderr] Compiling plotters-backend v0.3.6 [INFO] [stderr] Compiling anstyle v1.0.7 [INFO] [stderr] Compiling regex-syntax v0.8.3 [INFO] [stderr] Compiling clap_lex v0.7.0 [INFO] [stderr] Compiling itertools v0.10.5 [INFO] [stderr] Compiling plotters-svg v0.3.6 [INFO] [stderr] Compiling clap_builder v4.5.2 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling rayon v1.10.0 [INFO] [stderr] Compiling zerocopy v0.7.35 [INFO] [stderr] Compiling crossbeam-channel v0.5.13 [INFO] [stderr] Compiling plotters v0.3.6 [INFO] [stderr] Compiling is-terminal v0.4.12 [INFO] [stderr] Compiling ppv-lite86 v0.2.20 [INFO] [stderr] Compiling oorandom v11.1.3 [INFO] [stderr] Compiling sandpit v0.3.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/barrier.rs:146:17 [INFO] [stdout] | [INFO] [stdout] 146 | pub fn into(&self) -> Option> { [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] 146 | pub fn into(&self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/collector.rs:211:20 [INFO] [stdout] | [INFO] [stdout] 211 | fn new_mutator(&self) -> Mutator { [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] 211 | fn new_mutator(&self) -> Mutator<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/trace/tracer_controller.rs:80:23 [INFO] [stdout] | [INFO] [stdout] 80 | pub fn yield_lock(&self) -> RwLockReadGuard<()> { [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] 80 | pub fn yield_lock(&self) -> RwLockReadGuard<'_, ()> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/trace/tracer_controller.rs:84:32 [INFO] [stdout] | [INFO] [stdout] 84 | pub fn get_time_slice_lock(&self) -> MutexGuard<()> { [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] 84 | pub fn get_time_slice_lock(&self) -> MutexGuard<'_, ()> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling regex-automata v0.4.6 [INFO] [stderr] Compiling criterion-plot v0.5.0 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling clap v4.5.4 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling regex v1.10.4 [INFO] [stderr] Compiling ciborium v0.2.2 [INFO] [stderr] Compiling tinytemplate v1.2.1 [INFO] [stderr] Compiling criterion v0.5.1 [INFO] [stdout] warning: unused variable: `mu` [INFO] [stdout] --> examples/linked_list.rs:92:38 [INFO] [stdout] | [INFO] [stdout] 92 | fn pop_back(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>) -> Option> { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_mu` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mu` [INFO] [stdout] --> examples/linked_list.rs:109:25 [INFO] [stdout] | [INFO] [stdout] 109 | fn pop_front(&self, mu: &'gc Mutator<'gc>) -> Option { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_mu` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mu` [INFO] [stdout] --> examples/linked_list.rs:113:22 [INFO] [stdout] | [INFO] [stdout] 113 | fn delete(&self, mu: &'gc Mutator<'gc>, index: usize) -> &T { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_mu` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `index` [INFO] [stdout] --> examples/linked_list.rs:113:45 [INFO] [stdout] | [INFO] [stdout] 113 | fn delete(&self, mu: &'gc Mutator<'gc>, index: usize) -> &T { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_index` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mutator` [INFO] [stdout] --> examples/linked_list.rs:253:19 [INFO] [stdout] | [INFO] [stdout] 253 | arena.mutate(|mutator, arena| { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutator` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arena` [INFO] [stdout] --> examples/linked_list.rs:253:28 [INFO] [stdout] | [INFO] [stdout] 253 | arena.mutate(|mutator, arena| { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_arena` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `LinkedListIter` is never constructed [INFO] [stdout] --> examples/linked_list.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 10 | struct LinkedListIter<'gc, T: Trace> { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> examples/linked_list.rs:31:8 [INFO] [stdout] | [INFO] [stdout] 30 | impl<'gc, T: Trace> LinkedListIter<'gc, T> { [INFO] [stdout] | ------------------------------------------ associated function in this implementation [INFO] [stdout] 31 | fn new(list: &LinkedList<'gc, T>) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: multiple associated items are never used [INFO] [stdout] --> examples/linked_list.rs:56:8 [INFO] [stdout] | [INFO] [stdout] 45 | impl<'gc, T: Trace> LinkedList<'gc, T> { [INFO] [stdout] | -------------------------------------- associated items in this implementation [INFO] [stdout] ... [INFO] [stdout] 56 | fn iter(&self) -> LinkedListIter<'gc, T> { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 60 | fn push_back(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>, val: T) { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 76 | fn push_front(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>, val: T) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 92 | fn pop_back(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>) -> Option> { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 109 | fn pop_front(&self, mu: &'gc Mutator<'gc>) -> Option { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 113 | fn delete(&self, mu: &'gc Mutator<'gc>, index: usize) -> &T { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 117 | fn swap(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>, index: usize, val: T) { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 161 | fn at(&self, index: usize) -> Option<&T> { [INFO] [stdout] | ^^ [INFO] [stdout] ... [INFO] [stdout] 172 | fn len(&self) -> usize { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 176 | fn node_at(&self, index: usize) -> Option>> { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 188 | fn init_push(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>, gc_node: GcOpt<'gc, Node<'gc, T>>) { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 194 | fn set_start(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>, new: GcOpt<'gc, Node<'gc, T>>) { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 200 | fn set_end(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>, new: GcOpt<'gc, Node<'gc, T>>) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `set_prev`, `set_next`, `get_val`, `get_next`, and `get_prev` are never used [INFO] [stdout] --> examples/linked_list.rs:215:8 [INFO] [stdout] | [INFO] [stdout] 214 | impl<'gc, T: Trace> Node<'gc, T> { [INFO] [stdout] | -------------------------------- associated items in this implementation [INFO] [stdout] 215 | fn new(mu: &'gc Mutator<'gc>, val: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 223 | fn set_prev(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>, new: GcOpt<'gc, Self>) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 229 | fn set_next(this: Gc<'gc, Self>, mu: &'gc Mutator<'gc>, new: GcOpt<'gc, Self>) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 235 | fn get_val(&'gc self) -> &T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 239 | fn get_next(&'gc self) -> Option>> { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 243 | fn get_prev(&'gc self) -> Option>> { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> examples/linked_list.rs:235:30 [INFO] [stdout] | [INFO] [stdout] 235 | fn get_val(&'gc self) -> &T { [INFO] [stdout] | --- ^^ the same lifetime is elided here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is named 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: consistently use `'gc` [INFO] [stdout] | [INFO] [stdout] 235 | fn get_val(&'gc self) -> &'gc T { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/barrier.rs:146:17 [INFO] [stdout] | [INFO] [stdout] 146 | pub fn into(&self) -> Option> { [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] 146 | pub fn into(&self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/collector.rs:211:20 [INFO] [stdout] | [INFO] [stdout] 211 | fn new_mutator(&self) -> Mutator { [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] 211 | fn new_mutator(&self) -> Mutator<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/trace/tracer_controller.rs:80:23 [INFO] [stdout] | [INFO] [stdout] 80 | pub fn yield_lock(&self) -> RwLockReadGuard<()> { [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] 80 | pub fn yield_lock(&self) -> RwLockReadGuard<'_, ()> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/trace/tracer_controller.rs:84:32 [INFO] [stdout] | [INFO] [stdout] 84 | pub fn get_time_slice_lock(&self) -> MutexGuard<()> { [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] 84 | pub fn get_time_slice_lock(&self) -> MutexGuard<'_, ()> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 46.69s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: higher-kinded-types v0.1.1 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2` [INFO] running `Command { std: "docker" "inspect" "59e9dc04fc925e85f332cd5648a8aa25b571d37a164549933735b06cf7478f2a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "59e9dc04fc925e85f332cd5648a8aa25b571d37a164549933735b06cf7478f2a", kill_on_drop: false }` [INFO] [stdout] 59e9dc04fc925e85f332cd5648a8aa25b571d37a164549933735b06cf7478f2a