D20083.id.diff
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D20083.id.diff
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	diff --git a/src/utils/utils.php b/src/utils/utils.php
	--- a/src/utils/utils.php
	+++ b/src/utils/utils.php
	@@ -1010,11 +1010,26 @@
	// the stream, write to it again if PHP claims that it's writable, and
	// consider the pipe broken if the write fails.

	+ // (Signals received signals during the "fwrite()" do not appear to affect
	+ // anything, see D20083.)
	+
	$read = array();
	$write = array($stream);
	$except = array();

	- @stream_select($read, $write, $except, 0);
	+ $result = @stream_select($read, $write, $except, 0);
	+ if ($result === false) {
	+ // See T13243. If the select is interrupted by a signal, it may return
	+ // "false" indicating an underlying EINTR condition. In this case, the
	+ // results (notably, "$write") are not usable because "stream_select()"
	+ // didn't update them.
	+
	+ // In this case, treat this stream as blocked and tell the caller to
	+ // retry, since EINTR is the only condition we're currently aware of that
	+ // can cause "fwrite()" to return "0" and "stream_select()" to return
	+ // "false" on the same stream.
	+ return 0;
	+ }

	if (!$write) {
	// The stream isn't writable, so we conclude that it probably really is