ITHelpDec

```cpp void operator() () { impl_->call(); } // Thread 4: EXC_BAD_ACCESS (code=1, address=0x0) ``` Code crashes when running at real time and doesn't sort when stepping through with a debugger....

There's no mention of `thread_pool::task_handle` in the book or earlier in the examples until later on. https://github.com/anthonywilliams/ccia_code_samples/blob/6e7ae1d66dbd2e8f1ad18a5cf5c6d25a37b92388/listings/listing_9.5.cpp#L32 `std::future

A `return` is needed when calling the two-parameter version of `accumulate_block()` inside of the lambda function. ```diff futures[i] = pool.submit([=] () { - accumulate_block()(block_start, block_end); + return accumulate_block()(block_start, block_end); });...

`` appears to be declared twice here - just needs removed.

Slight tweaks to address deprecations, unnecessary calls to `operator new` and use of `noexcept` with move(-assignment) operations. There also appears to be a data race when using one of the...

Most of this has been addressed in an earlier issue, so thank you to @dragon-dreamer and @xxrlzzz. * #5 As it stands, an incomplete `join_threads` will result in a runtime...

Two changes are needed to get this code to compile: 1) Change line 60 from `return last` to return (this is a `void` function, we our not returning an `_OutputIterator`...

> _"...onto the elements in the third and final chunk to get the final result: {1, 3, 6}, {10, 15, 21}, {28, 36, 55}."_ – pg. 290 The final element...

### Issues 1) Two headers are missing (`` and ``) 2) Our `std::packaged_task` is constructed incorrectly (requires extra parentheses) 3) The default constructor for `accumulate_block` is mistakenly called in place...

Not sure what compiler this code was tested on, but we need the following headers to allow our example to compile. ```cpp #include // std::accumulate #include // std::mem_fn ``` ###...