XQuery, MIXUPDATES, function items

[ChristianGruen]

Command script:

SET MIXUPDATES true
XQUERY xquery:eval('<a/> update { }')

The query raises an error. It should be detected as non-updating in spite of the MIXUPDATES flag.

Background: Various checks are omitted if MIXUPDATES is enabled.

basex/basex-core/src/main/java/org/basex/query/QueryParser.java

Lines 289 to 298 in 4b1d517

	if(qc.updating && !sc.mixUpdates) {
	qc.functions.checkUp();
	qc.vars.checkUp();
	if(main != null) {
	main.expr.checkUp();
	qc.updating = main.expr.has(Flag.UPD);
	} else {
	qc.updating = false;
	}
	}