Single quotes are not valid label value delimiters.

pkg/textparse/lex.l

@@ -88,8 +88,6 @@ M     [a-zA-Z_:]
                                         return -1
                                       }
                                       l.offsets = append(l.offsets, l.i-1)
-<lstateLValue>\'(\\.|[^\\']|\0)*\'    s = lstateLabels
-                                      l.offsets = append(l.offsets, l.i-1)
 
 <lstateValue>[ \t]+                   l.vstart = l.i
 <lstateValue>(NaN)                    l.val = math.Float64frombits(value.NormalNaN)

pkg/textparse/lex.l.go

@@ -146,7 +146,7 @@ yystate9:
 	c = l.next()
 	switch {
 	default:
-		goto yyrule14
+		goto yyrule13
 	case c >= '\x01' && c <= '\b' || c == '\v' || c == '\f' || c >= '\x0e' && c <= '\x1f' || c >= '!' && c <= 'ÿ':
 		goto yystate9
 	}
@@ -155,7 +155,7 @@ yystate10:
 	c = l.next()
 	switch {
 	default:
-		goto yyrule12
+		goto yyrule11
 	case c == '\t' || c == ' ':
 		goto yystate10
 	}
@@ -164,7 +164,7 @@ yystate11:
 	c = l.next()
 	switch {
 	default:
-		goto yyrule14
+		goto yyrule13
 	case c == 'a':
 		goto yystate12
 	case c >= '\x01' && c <= '\b' || c == '\v' || c == '\f' || c >= '\x0e' && c <= '\x1f' || c >= '!' && c <= '`' || c >= 'b' && c <= 'ÿ':
@@ -175,7 +175,7 @@ yystate12:
 	c = l.next()
 	switch {
 	default:
-		goto yyrule14
+		goto yyrule13
 	case c == 'N':
 		goto yystate13
 	case c >= '\x01' && c <= '\b' || c == '\v' || c == '\f' || c >= '\x0e' && c <= '\x1f' || c >= '!' && c <= 'M' || c >= 'O' && c <= 'ÿ':
@@ -186,7 +186,7 @@ yystate13:
 	c = l.next()
 	switch {
 	default:
-		goto yyrule13
+		goto yyrule12
 	case c >= '\x01' && c <= '\b' || c == '\v' || c == '\f' || c >= '\x0e' && c <= '\x1f' || c >= '!' && c <= 'ÿ':
 		goto yystate9
 	}
@@ -210,13 +210,13 @@ yystart14:
 
 yystate15:
 	c = l.next()
-	goto yyrule18
+	goto yyrule17
 
 yystate16:
 	c = l.next()
 	switch {
 	default:
-		goto yyrule15
+		goto yyrule14
 	case c == '\t' || c == ' ':
 		goto yystate16
 	}
@@ -225,7 +225,7 @@ yystate17:
 	c = l.next()
 	switch {
 	default:
-		goto yyrule17
+		goto yyrule16
 	case c == '\n' || c == '\r':
 		goto yystate17
 	}
@@ -234,7 +234,7 @@ yystate18:
 	c = l.next()
 	switch {
 	default:
-		goto yyrule16
+		goto yyrule15
 	case c >= '0' && c <= '9':
 		goto yystate18
 	}
@@ -311,8 +311,6 @@ yystart26:
 		goto yyabort
 	case c == '"':
 		goto yystate27
-	case c == '\'':
-		goto yystate30
 	}
 
 yystate27:
@@ -339,30 +337,6 @@ yystate29:
 		goto yystate27
 	}
 
-yystate30:
-	c = l.next()
-	switch {
-	default:
-		goto yystate30 // c >= '\x00' && c <= '&' || c >= '(' && c <= '[' || c >= ']' && c <= 'ÿ'
-	case c == '\'':
-		goto yystate31
-	case c == '\\':
-		goto yystate32
-	}
-
-yystate31:
-	c = l.next()
-	goto yyrule11
-
-yystate32:
-	c = l.next()
-	switch {
-	default:
-		goto yyabort
-	case c >= '\x01' && c <= '\t' || c >= '\v' && c <= 'ÿ':
-		goto yystate30
-	}
-
 yyrule1: // \0
 	{
 		return eof
@@ -421,24 +395,18 @@ yyrule10: // \"(\\.|[^\\"]|\0)*\"
 		l.offsets = append(l.offsets, l.i-1)
 		goto yystate0
 	}
-yyrule11: // \'(\\.|[^\\']|\0)*\'
-	{
-		s = lstateLabels
-		l.offsets = append(l.offsets, l.i-1)
-		goto yystate0
-	}
-yyrule12: // [ \t]+
+yyrule11: // [ \t]+
 	{
 		l.vstart = l.i
 		goto yystate0
 	}
-yyrule13: // (NaN)
+yyrule12: // (NaN)
 	{
 		l.val = math.Float64frombits(value.NormalNaN)
 		s = lstateTimestamp
 		goto yystate0
 	}
-yyrule14: // [^\n \t\r]+
+yyrule13: // [^\n \t\r]+
 	{
 		// We don't parse strictly correct floats as the conversion
 		// repeats the effort anyway.
@@ -449,12 +417,12 @@ yyrule14: // [^\n \t\r]+
 		s = lstateTimestamp
 		goto yystate0
 	}
-yyrule15: // [ \t]+
+yyrule14: // [ \t]+
 	{
 		l.tstart = l.i
 		goto yystate0
 	}
-yyrule16: // {D}+
+yyrule15: // {D}+
 	{
 		ts, err := strconv.ParseInt(yoloString(l.b[l.tstart:l.i]), 10, 64)
 		if err != nil {
@@ -464,12 +432,12 @@ yyrule16: // {D}+
 		l.ts = &ts
 		goto yystate0
 	}
-yyrule17: // [\r\n]+
+yyrule16: // [\r\n]+
 	{
 		l.nextMstart = l.i
 		return 1
 	}
-yyrule18: // \0
+yyrule17: // \0
 	{
 		return 1
 

pkg/textparse/parse_test.go

@@ -113,6 +113,14 @@ func TestParseErrors(t *testing.T) {
 			input: "a",
 			err:   "no token found",
 		},
+		{
+			input: "a{b='c'} 1\n",
+			err:   "no token found",
+		},
+		{
+			input: "a{b=\n",
+			err:   "no token found",
+		},
 		{
 			input: "a{\xff=\"foo\"} 1\n",
 			err:   "no token found",