Makes sure that `FindClose` gets called before `listDirectory` returns to avoid a race-condition, where a successive modification of the directory fails with "access denied".
Calling Task.interrupt() on a task that is already finished, but ran on the same fiber would trigger an assertion failure instead of returning silently.
IOMode.once causes the read() to return with IOStatus.wouldBlock immediately, which previously resulted in erroneously reporting WaitForDataStatus.noModeData instead of timeout.
See vibe-d/vibe.d#2483
The file I/O versions of cancelRead and cancelWrite in eventcore currently do not reliably cancel the operation in a synchronous fashion, leading to continued buffer accesses after the cancellation call. In case of the Windows version, this also means that the OVERLAPPED structure can be illegally reused for the next operation, while the previous one hasn't been canceled, yet.
A solution to this issue may require a fundamental change in the file I/O API of eventcore, and the optimal design of that still needs to be worked out. For this reason, we simply avoid using the cancellation functions in vibe-core for now to avoid memory corruption issues. This does mean that interrupting a task that does file I/O won't work anymore.
Many places around were re-inventing logException with varying level of success.
In addition, the full error is now printed as a diagnostic instead of debug.
This is more in line with the description of `LogLevel.diagnostic`
("Extended user information (e.g. for more detailed error information)"),
as opposed to the one of `LogLevel.debug_`
("Developer information useful for algorithm debugging").
Since DMD v2.079.0 it is possible to put default, always-used default parameters
after variadic arguments (as long as IFTI is used).
This way we can move all the compile-time arguments, which would always trigger
a template instantiation, to runtime arguments, and re-enable module and function.
The code as is never checks the requested address family when doing a DNS query,
so resolving an IPv6 only host with AddressFamily.INET would still return an IPv6.
Recently, dub was upgraded from v1.18.0 to v1.22.0
(the remote LATEST file was fixed), which caused half of the test-suite
(all non select-based configs) to fail, because the 'args' test would
somehow run the `0-tcp.d` file.
This works around the problem by using `--single` explicitly.
