<p class="rule">
For any call to <code>l.RLock</code> on a <code>sync.RWMutex</code> variable <code>l</code>,
there is an <i>n</i> such that the <i>n</i>th call to <code>l.Unlock</code>
is synchronized before the return from <code>l.RLock</code>,
and the matching call to <code>l.RUnlock</code> is synchronized before the return from call <i>n</i>+1 to <code>l.Lock</code>.
</p>

<p class="rule">

    </p>
    <p>
      Execution traces now use the operating system's clock on most platforms (Windows excluded) so
      it is possible to correlate them with traces produced by lower-level components.
      Execution traces no longer depend on the reliability of the platform's clock to produce a correct trace.
      Execution traces are now partitioned regularly on-the-fly and as a result may be processed in a

</pre>


<h2 id="Blocks">Blocks</h2>

<p>
A <i>block</i> is a possibly empty sequence of declarations and statements
within matching brace brackets.
</p>

<pre class="ebnf">
Block = "{" StatementList "}" .
StatementList = { Statement ";" } .
</pre>

<p>
In addition to explicit blocks in the source code, there are implicit blocks:
</p>

<ol>

            }
        }
        return incubating.replace(NEWLINE_REGEX, " ")
    }

    private
    fun KtFile.forEachIncubatingDeclaration(block: (KtNamedDeclaration) -> Unit) {
        collectDescendantsOfType<KtNamedDeclaration>().filter { it.isIncubating }.forEach(block)
    }

    private
    val KtNamedDeclaration.isIncubating: Boolean
        get() = annotationEntries.any { it.shortName?.asString() == "Incubating" }

</p>

<h2 id="Blocks">Blocks</h2>

<p>
A <i>block</i> is a possibly empty sequence of declarations and statements
within matching brace brackets.
</p>

<pre class="ebnf">
Block = "{" StatementList "}" .
StatementList = { Statement ";" } .
</pre>

<p>
In addition to explicit blocks in the source code, there are implicit blocks:
</p>

<ol>

directive declares the symbol <code>runtime·profileloop</code> and the instructions
that follow form the body of the function.
The last instruction in a <code>TEXT</code> block must be some sort of jump, usually a <code>RET</code> (pseudo-)instruction.
(If it's not, the linker will append a jump-to-itself instruction; there is no fallthrough in <code>TEXTs</code>.)

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    </div>
    <div class="item">