character classes: handle \Q\E and utf8

src/parser/Parser.rl

@@ -1184,6 +1184,11 @@ unichar readUtf8CodePoint4c(const char *s) {
                   currentSeq->addComponent(move(cc));
               };
 
+              hi_byte when is_utf8 => {
+                  assert(mode.utf8);
+                  throwInvalidUtf8();
+              };
+
               # Literal character
               any => {
                   addLiteral(currentSeq, *ts, mode);
@@ -1198,6 +1203,31 @@ unichar readUtf8CodePoint4c(const char *s) {
               '\\E' => {
                   fret;
               };
+
+              #unicode chars
+              utf8_2c when is_utf8 => {
+                  assert(mode.utf8);
+                  currentCls->add(readUtf8CodePoint2c(ts));
+                  inCharClassEarly = false;
+              };
+
+              utf8_3c when is_utf8 => {
+                  assert(mode.utf8);
+                  currentCls->add(readUtf8CodePoint3c(ts));
+                  inCharClassEarly = false;
+              };
+
+              utf8_4c when is_utf8 => {
+                  assert(mode.utf8);
+                  currentCls->add(readUtf8CodePoint4c(ts));
+                  inCharClassEarly = false;
+              };
+
+              hi_byte when is_utf8 => {
+                  assert(mode.utf8);
+                  throwInvalidUtf8();
+              };
+
               # Literal character
               any => {
                   currentCls->add(*ts);

unit/hyperscan/bad_patterns.txt

@@ -142,3 +142,5 @@
 145:/abc/8{edit_distance=1} #UTF-8 is disallowed for approximate matching.
 146:/(*UTF8)abc/{edit_distance=1} #UTF-8 is disallowed for approximate matching.
 147:/\b\BMYBt/s{edit_distance=1} #Pattern can never match.
+148:/\QÀ\Eaaaa/8 #Expression is not valid UTF-8.
+149:/[\QÀ\Eaaaa]/8 #Expression is not valid UTF-8.