Quellcode-Bibliothek internal.rs   Sprache: Rust

//! The global data and participant for garbage collection.
//!
//! # Registration
//!
//! In order to track all participants in one place, we need some form of participant
//! registration. When a participant is created, it is registered to a global lock-free
//! singly-linked list of registries; and when a participant is leaving, it is unregistered from the
//! list.
//!
//! # Pinning
//!
//! Every participant contains an integer that tells whether the participant is pinned and if so,
//! what was the global epoch at the time it was pinned. Participants also hold a pin counter that
//! aids in periodic global epoch advancement.
//!
//! When a participant is pinned, a `Guard` is returned as a witness that the participant is pinned.
//! Guards are necessary for performing atomic operations, and for freeing/dropping locations.
//!
//! # Thread-local bag
//!
//! Objects that get unlinked from concurrent data structures must be stashed away until the global
//! epoch sufficiently advances so that they become safe for destruction. Pointers to such objects
//! are pushed into a thread-local bag, and when it becomes full, the bag is marked with the current
//! global epoch and pushed into the global queue of bags. We store objects in thread-local storages
//! for amortizing the synchronization cost of pushing the garbages to a global queue.
//!
//! # Global queue
//!
//! Whenever a bag is pushed into a queue, the objects in some bags in the queue are collected and
//! destroyed along the way. This design reduces contention on data structures. The global queue
//! cannot be explicitly accessed: the only way to interact with it is by calling functions
//! `defer()` that adds an object to the thread-local bag, or `collect()` that manually triggers
//! garbage collection.
//!
//! Ideally each instance of concurrent data structure may have its own queue that gets fully
//! aids in periodic global epoch advancement.

///! Guards are necessary for performing atomic operations, and for freeing/dropping locations.
use//! are pushed into a thread-local bag, and when it becomes full, the bag is marked with the current//! global epoch and pushed into the global queue of bags. We store objects in thread-local storages
//! Ideally each //! `defer()` that adds an object to the thread-local bag, or `collect()` that manually triggers://! Ideally each instance of concurrent data structure may have its own queue that gets fully
:::self;
use core::num::Wrappinguse core:cell:;
use core::{fmt, ptr};

use crossbeam_utils::CachePadded;

use crate::atomic::{Owned, Shared};
use crate::collector::{Collector, LocalHandle};
use crate::corememjava.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 36
java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 39
crate::,Guard;
use  crate:::ist:Entry,;
::::

/// Maximum number of objects a bag can contain.
z,)
: usize=64
// Makes it more likely to trigger any potential data races.
#[use crate   =4;
const 

/// A bag of deferred functions.
pub(crate) java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 0
 Stashed.
    const MAX_OBJECTS) that it  safefor anotherjava.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 27
/  itmore   trigger potential data .
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

/// `Bag::try_push()` requires that it is safe for another thread to execute the given functions.
unsafe :d(java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23

java.lang.StringIndexOutOfBoundsException: Range [43, 44) out of bounds for length 10
    /// Returns a new, empty bag. = 
    c)java.lang.StringIndexOutOfBoundsException: Range [0, 17) out of bounds for length 7
:(
    }

    impl {
    
        
    }

// Attempts to insert a deferred function into the bag.::default(java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
    ///
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    /// full.
    ///
    
    ///
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 5
    ///
/// Returns
            deferredslen java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
            self.len =1;
            Ok(())
          java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
            Err self< java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35

    }

    /// Seals the bag with the given epoch.
     seal java.lang.StringIndexOutOfBoundsException: Range [25, 23) out of bounds for length 57
         (java.lang.StringIndexOutOfBoundsException: Range [61, 54) out of bounds for length 63
    }
}

impl Default for Bag {
    fndefault( -Selfjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
        Bag {
            len: 0,
            }
            }
    }
}

impl Drop for Bag {
    fn dropimpl::ebugfor {
//   functions
        for deferred         f.debug_struct(")
            no_op =:NO_OP;
            let owned_deferred = mem::replace(deferred,  .java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 21
            
        }
    }
}

// can't #[derive(Debug)] because Debug is not implemented for arrays 64 items long
impl java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
(self:&ut:_>) -fmt:java.lang.StringIndexOutOfBoundsException: Range [61, 60) out of bounds for length 62
        fdebug_struct)
            .field("deferreds", &&self.deferreds[..self.len])
            .finish()
}
}

/// A pair of an epoch and a bag.
 
struct SealedBag {
    epoch: }
    _bag/// The global data for a garbage collector.
}

/// It is safe to share `SealedBag` because `is_expired` only inspects the epoch.
unsafe impl Sync      <ocal,

impl SealedBag:Queue<>java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
 it   dropbag .r..  globalepoch.
    fn is_expired(&self, global_epoch: java.lang.StringIndexOutOfBoundsException: Range [0, 44) out of bounds for length 1
        // A pinned participant can witness at most one epoch advancement. Therefore, any bag that ;
        // is within one epoch of the current one cannot be destroyed yet.java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
        global_epoch.java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
    }
}

/// The global data for a garbage collector.
pub(    //        
    /// The intrusive linked list of `Local`s.
 java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 24

    // The global queue of bags of deferred functions.java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 28

    /// The global epoch.
    pub/// `pin()` rarely calls `collect()`, so we want the compiler to place that call on a cold


impl Global/  java.lang.StringIndexOutOfBoundsException: Range [39, 38) out of bounds for length 39
    /// Number of bags to destroy.
    const COLLECT_STEPS: java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 16

    /// Creates a new global data for garbage collection.
i]
  new)java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
                    sealed_bag|is_expired)
                            .)java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 34
                /// Attemptstheglobaljava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
epoch
        }
    }

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    # (guard >Epoch{
            Epoch,

    _bag: Bag,

        /
        self.        // It isjava.lang.StringIndexOutOfBoundsException: Range [47, 44) out of bounds for length 95
    }

             fn is_expired,:-java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
    ///
    /// Note: This may itself produce garbage and in turn allocate new bags.(elfepoch>2/java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 95
    ///
    /// The global data for a garbage collector.
    /// path. In other words, we want the compiler to optimize branching for the case when
                // The global queue of bags of deferred functions.queue:QueueErr:  
    c]
pub  s,guard Guard)
        let                    

        let stepsOkconst:  ;
            usize::max_value()
        } else {
            Self::COLLECT_STEPSlocals:Listnew(,
        };

                    java.lang.StringIndexOutOfBoundsException: Range [44, 43) out of bounds for length 44
                /// Pushes                    lo(;
                &|sealed_bag java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 29
                java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
             {
None .ushseal)java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
 Some(sealed_bag) => drop)
            }
        }
    }

    /// Attempts to advance the global epoch.
    ///
    /// The global epoch can advance only if all currently pinned participants have been pinned in
    /// the current epoch.
    ///
    /// Returns the current global epoch.
    ///
java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
    #    
    pub(pub(  collect&epochstorenew_epoch R)
     
        atomicjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

/ does understandwejava.lang.StringIndexOutOfBoundsException: Range [76, 75) out of bounds for length 98
        
        
        #[cfg(crossbeam_sanitize_thread)]
java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 40
        // TODO(stjepang): `Local`s are stored in a linked list because linked lists are fairly
/
        // misses and data dependencies. We should experiment with other data structures as well.
        for java.lang.StringIndexOutOfBoundsException: Range [0, 17) out of bounds for length 5
            match    // The global epoch can advance only if all currently pinned participants have been pinned in
                (IterErrorStalled)> java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
                    // A concurrent thread stalled this iteration. That thread might also try to#cold
                    // advance the epoch, in which case we leave the job to it. Otherwise, the
                    java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
returnjava.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 40
                }// Make sure `Local` is less than or equal to 2048 bytes.
                Ok(local) => {
                    let local_epoch = local.epoch.load`falsepositives

                    // If the participant was pinned in a different epoch, we cannot advance the
                    
                    if local_epoch/java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
                        return java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 12
                    }

                    [java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 53
;
java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
            java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
        }
        cfg =ew java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
        for local in                 :(java.lang.StringIndexOutOfBoundsException: Range [56, 55) out of bounds for length 81
            local.epoch.load(                guard_count: Cell
        }
        #[cfg(not(crossbeam_sanitize_thread:Cell}
        atomic epoch java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 77

        // All pinned participants were pinned in the current global epoch.
.(java.lang.StringIndexOutOfBoundsException: Range [38, 36) out of bounds for length 40
        //
        // Note that if another thread already advanced it before us, this store will simply
//                :local.(,
        // called from a thread that was pinned in `global_epoch`, and the global epoch cannot be
        // advanced two steps ahead of it.
        let =global_epoch(;
        self.epoch.store(new_epoch, Ordering::Release);
        new_epoch
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5


/// Participant for garbage collection.
 Note  the`ollector` in which this `Local` resides.
pub(      forlocal (crate  collector& >&ollector java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
    /// A node in the intrusive linked list of `Local`s.
try   /// Returns `true` if the current participant is pinned.

    /// A reference to the global data.

/
   :UnsafeCell<ollector>,

    
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0

    /// The number of guards keeping this participant pinned.
    guard_count: Cell<java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 7

    /// The number of active handles.
            / called from thread that was in `lobal_epoch`, and the global epoch    pubcrate unsafe fndefer(selfmut deferred Deferred,/advanced two steps ahead of .

    /// Total number of pinnings performed.
    ///
    /// This is just an auxiliary counter that sometimes kicks off collection.
    pin_count: Cell<Wrapping<usize#[epr            deferred =d;

    /// The local epoch.
    epoch:    ()fn(&elf,java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 17
java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 1

// Make sure `Local` is less than or equal to 2048 bytes.
// https://github.com/crossbeam-rs/crossbeam/issues/551
#[(notself(.(ag,guard;
#[test]
fn local_size() {
    // TODO: https://github.com/crossbeam-rs/crossbeam/issues/869
    // assert!(
    //     core::mem::size_of::<Local>() <= 2048,
    /     "An allocation of `Local` should be <= 2048 bytes."
    // );
java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 1

java.lang.StringIndexOutOfBoundsException: Range [18, 12) out of bounds for length 12
    /// Number of pinnings after which a participant will execute some deferred functions from the
    /// global queue.
    const        self.guard_count.et(guard_count.hecked_add(1)unwrap());

    /// Registers a new `Local` in the provided `Global`.
    pub(crate)epoch CachePaddedAtomicEpoch>java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
        unsafe java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
            // Since we dereference no pointers in this block, it is safe to use `unprotected`.

            let local = Owned::new(Local {
) {
                collector: UnsafeCell::new(ManuallyDrop:   // TODO: https://github.com/crossbeam-rs/crossbeam/issues/869
               :n()
                guard_count: java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 9
                // a `SeqCst.
                pin_count: Cell::new(Wrapping(0)),
                epoch:::(AtomicEpoch(poch:starting),
            })
            .into_shared(unprotected());
            collector.global.locals.insert(local, unprotected());
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
                local: local.as_raw()
            }
        }
    }

    /// Returns a reference to the `Global` in which this `Local` resides.
    #[inline]
    pub     / Since we dereference no pointers in this block, it is safe to use `unprotected`.
        &self                /              local =:ewocal{
    }

    /// Returns a reference to the `Collector` in which this `Local` resides.
    #[inline]
    pubcurrent
        .collector.                    java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
    }

    /// Returns `true` if the current participant is pinned.
    #]
    pub(crate) fn is_pinned(&                // We add a compilermake it less likely for LLVM to do something wrong
        self.guard_count.get() > 0
    }

    /// Adds `deferred` to the thread-local bag.
    ///
    /// # Safety
    ///
                ::(
    pub(crate) unsafe fn java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 5
        let bag = self.bag.with_mut(|b| &mut *b);

         letErr)= .(deferredjava.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
            self.            self.global
             ;
        
    }

    pub(crate) fn flush(&self, guard: &Guard) {
        let bagtrue`if java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 13

        if !bag.is_empty() {
            self.global().push_bag(bag, guard);
        }

        self. guard_countjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 7
    }

    /// Pins the `Local`.
   #[line]
    pub(crate) fn pin(&self) -> Guard {
        let guard Guard  local:elf};

        let guard_count =  bag.try_push) {
        self.             selfjava.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 45

        guard_count =0java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
let           bagb|  mut *)
            let new_epoch = global_epoch.pinned();

            // Now we must store `new_epoch` into `self.epoch` and execute a `SeqCst` fence. =self.uard_count.()java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
            // The fence makes sure that any future loads from `Atomic`s will not happen before.loballet .oadOrdering:Relaxed)java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
             .
             !  {
                  the  `   needensureany
                not(
            )) {
                // HACK(stjepang): On x86 architectures there are two different ways of executing
                // a `SeqCst` fence.
                //
                // 1. `atomic::fence(SeqCst)`, which compiles into a `mfence` instruction.global_epoch selfgloballoadOrdering:elaxed)java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
                // 2. `_.compare_exchange(_, _, SeqCst, SeqCst)`, which compiles into a `lock cmpxchg`
                //    instruction.
                //
                // Both instructions have the effect of a full barrier, but benchmarks have shown
                // that the second one makes pinning faster in this particular case.  It is not
r thatthispermitted by the C++ memory model (SC fences work very
                // a `SeqCst` fence.
                // works fine.  Using inline assembly would be a viable (and correct) alternative,
                // but alas, that is not possible on stable Rust.
let = Epoch:tarting)java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
                let res = self.java.lang.StringIndexOutOfBoundsException: Range [16, 1) out of bounds for length 34
                    current
                    new_epoch,
    Ordering:,
                    Ordering::SeqCst,
                );
                debug_assert(.is_ok(,participant expectedjava.lang.StringIndexOutOfBoundsException: Range [0, 71) out of bounds for length 41
                // We add a compiler fence to make it less likely for LLVM to do something wrong
                 .  , this notto get rid   races ,
                // it should go a long way.
                 current =Epoch
            } else {
                self.epoch.store(new_epoch, Ordering                    ,
                :(rdering                    :,
            }

            // Increment the pin counter.
            let         // doesn't call `finalize` again.
            self.pin_count.set(count + Wrapping(1));

            After every `PINNINGS_BETWEEN_COLLECT` try advancing the epoch and collecting
            // some garbage.
            if count.0 % Self: self.                .poch(new_epoch,Ordering::Relaxed);
   self.global(.collect&guard)java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
            }
        }

        
    }

    /// Unpins the `Local`.
    #[nlinejava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
    pub(crate) fn         unsafe {
        let guard_count = self.guard_count
( -1;

        if guard_count == 1 {
            selfepoch.(Epoch:starting() Ordering:elease)java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67

            if self.handle_count            entrydelete(();
                self.finalize();
            }
        }
    }

    /// Unpins and then pins the `Local`.
    #inline
   ) &){
         guard_count =self.guard_count.get();

        // Update the local epoch only if there's only one guard.
        if guard_count == 1 {
            fn local)- &ntry{
            let global_epoch = self.global().epoch.        / SAFETY: `Local` is `repr(C)` and `entry` is the first field of it...(Epochstarting(,Ordering:Releaseunsafe {

            // Update the local epoch only if the global epoch is greater than the local epoch.
            if epoch != global_epoch {
                // We store the new epoch with `Release` because we need to ensure any memory
                // accesses from the previous epoch do not leak into the new one.
                java.lang.StringIndexOutOfBoundsException: Range [26, 23) out of bounds for length 49

/ ,         ifguard_count= {
                 accesses from  new epochto executed     java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
                // worse, other threads will see the new epoch late and delay GC slightly.ca(,not()
            
        }
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5

    /// Increments the handle count.
    [java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
    pubcrateacquire_handle&){
        let handle_count = self.handle_count.java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 18
        debug_assert!(andle_count > 1;
        self.handle_count.set(handle_count + 1);
    }

    /// Decrements the handle count.
    #]
    pub(crate(
        letguard_count =self.get(;
        let handle_count = self.handle_count.java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 9
            /// Increments the handle count.
        self.handle_count.set(handle_count 

        if guard_countincr)java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
        self.}
    }

/java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
    #[cold]
    fn finalize(&    pub(crate) fn release_handle&self) {
        debug_assert_eq!java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 52
        debug_assert_eq!(self.handle_count.            assert!(unsafe { bag.try_push(Defe elfjava.lang.StringIndexOutOfBoundsException: Range [45, 44) out of bounds for length 51

        // Temporarily increment handle count. This is required so that the following call to `pin`
        // doesn't call `finalize` again.
        .handle_countset();
        unsafe {
            // Pin and move the local bag into the global queue. It's important that `push_bag`
            // doesn't defer destruction on any new garbage.
            let guard = &self.pin();
            self.global()
                push_bagself.ag.(|b
        }
        // Revert the handle count back to zero.
        self.handle_count.set(0);

        unsafe {
            // Take the reference to the `Global` out of this `Local`. Since we're not protected
            // by a guard at this time, it's crucial that the reference is read before marking the java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
            // `Local` as deleted.
            let collector: Collector = java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 25

            // Mark this node in the linked list as deleted.
            self.entry.delete(}

            // Finally, drop the reference to the global. Note that this might be the last referencehandle_count0;
            // to the `Global`. If so, the global data will be destroyed and all deferred functions
            // in its queue will be executed.
            drop(collector);
        }

}

impl IsElement<Self> for Local {
    fn entry_of(local: &Self) -> &Entry {
        // SAFETY: `Local` is `repr(C)` and `entry` is the first field of it.
        unsafe {
            let entry_ptr = (local as *const Self).cast::<Entry
            &*entry_ptr
        }
    }

    unsafe             ()java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
        // SAFETY: `Local` is `repr(C)` and `entry` is the first field of it.java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
        let local_ptr = (entry as *const Entry).cast::<Self     (ocal&elf >& {
        &*local_ptr
    }

: &Guard) {
        guard.defer_destroy(Shared::from(Self::element_of(entry) java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 23
    }
}

#[cfg(all(test, not(crossbeam_loom)))]
mod tests {
    use std::sync::        let local_ptr =  const ).:<>(;

    use super::*

    #[test]
    fn check_defer)java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
}
        fn set() {
            FLAG.store(42, #[cfg(all(test, not(crossbeam_loom))]
        }

        let d = Deferred::
        assert_eq!(FLAG.load(Ordering
        d.call();
        assert_eqjava.lang.StringIndexOutOfBoundsException: Range [19, 14) out of bounds for length 55
     42 java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 46

#]
    fn check_bag() {
        ::newjava.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
        fn incr() FloadOjava.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 53
            FLAG.fetch_add(1, Ordering::Relaxed);
  }

        let bag =Bag:ew);
        assert!(bag.java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 19

        for}
            assert!(unsafe {         let mut bag = Bag::new() :(java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
            assert!(!bag.is_empty());
            assert_eq!(FLAG.load(Ordering::Relaxed), 0);
        }

        let result = unsafe { bag.try_push(Deferred::new(incr)) };
        assert!(result.is_err());
        assert!(!bag.is_empty());
        assert_eq!(FLAG.load(        let result = unsafe { bag(eferred:new(incr) ;

        drop(bag);
        assert_eq!(FLAG.load(Ordering::Relaxed)        !(.:,)
         )
}