parser/pagerparser: Fix closing shortcode error handling when repeated

parser/pageparser/pagelexer_shortcode.go

@@ -255,16 +255,18 @@ Loop:
 		default:
 			l.backup()
 			word := string(l.input[l.start:l.pos])
-			if l.closingState > 0 && !l.openShortcodes[word] {
-				return l.errorf("closing tag for shortcode '%s' does not match start tag", word)
-			} else if l.closingState > 0 {
+			if l.closingState > 0 {
+				if !l.openShortcodes[word] {
+					return l.errorf("closing tag for shortcode '%s' does not match start tag", word)
+				}
 				l.openShortcodes[word] = false
 				lookForEnd = true
+			} else {
+				l.openShortcodes[word] = true
 			}
 
 			l.closingState = 0
 			l.currShortcodeName = word
-			l.openShortcodes[word] = true
 			l.elementStepNum++
 			if l.isInline {
 				l.emit(tScNameInline)

parser/pageparser/pageparser_shortcode_test.go

@@ -27,6 +27,7 @@ var (
 	tstRightMD   = nti(tRightDelimScWithMarkup, "%}}")
 	tstSCClose   = nti(tScClose, "/")
 	tstSC1       = nti(tScName, "sc1")
+	tstSCAnother = nti(tScName, "another")
 	tstSC1Inline = nti(tScNameInline, "sc1.inline")
 	tstSC2Inline = nti(tScNameInline, "sc2.inline")
 	tstSC2       = nti(tScName, "sc2")
@@ -74,6 +75,10 @@ var shortCodeLexerTests = []lexerTest{
 		tstLeftNoMD, tstSC1, tstRightNoMD, tstLeftNoMD, tstSCClose,
 		nti(tError, "closing tag for shortcode 'another' does not match start tag"),
 	}, nil},
+	{"close wrong, repeated", `{{< sc1 >}}{{< another >}}{{< /another >}}{{< /another >}}`, []typeText{
+		tstLeftNoMD, tstSC1, tstRightNoMD, tstLeftNoMD, tstSCAnother, tstRightNoMD, tstLeftNoMD, tstSCClose, tstSCAnother, tstRightNoMD, tstLeftNoMD, tstSCClose,
+		nti(tError, "closing tag for shortcode 'another' does not match start tag"),
+	}, nil},
 	{"close, but no open, more", `{{< sc1 >}}{{< /sc1 >}}{{< /another >}}`, []typeText{
 		tstLeftNoMD, tstSC1, tstRightNoMD, tstLeftNoMD, tstSCClose, tstSC1, tstRightNoMD, tstLeftNoMD, tstSCClose,
 		nti(tError, "closing tag for shortcode 'another' does not match start tag"),