Fix #1169

Author: cowtowncoder

release-notes/VERSION-2.x

@@ -18,6 +18,8 @@ a pure JSON library.
 
 #1157: Use fast parser (FDP) for large `BigDecimal`s (500+ chars)
  (contributed by @pjfanning)
+#1169: `ArrayIndexOutOfBoundsException` for specific invalid content,
+  with Reader-based parser
 
 2.16.1 (not yet released)
 

src/main/java/com/fasterxml/jackson/core/json/ReaderBasedJsonParser.java

@@ -1582,8 +1582,7 @@ private final JsonToken _parseNumber2(boolean neg, int startPtr) throws IOExcept
         // This is the place to do leading-zero check(s) too:
         int intLen = 0;
         char c = (_inputPtr < _inputEnd) ? _inputBuffer[_inputPtr++]
-                : getNextChar("No digit following minus sign", JsonToken.VALUE_NUMBER_INT);
-
+                : getNextChar("No digit following sign", JsonToken.VALUE_NUMBER_INT);
         if (c == '0') {
             c = _verifyNoLeadingZeroes();
         }
@@ -1609,7 +1608,7 @@ private final JsonToken _parseNumber2(boolean neg, int startPtr) throws IOExcept
         // Also, integer part is not optional
         if (intLen == 0) {
             // [core#611]: allow optionally leading decimal point
-            if (!isEnabled(JsonReadFeature.ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS.mappedFeature())) {
+            if ((c != '.') || !isEnabled(JsonReadFeature.ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS.mappedFeature())) {
                 return _handleInvalidNumberStart(c, neg);
             }
         }

src/test/java/com/fasterxml/jackson/core/fuzz/Fuzz61198_1169_NumberParseTest.java

@@ -38,7 +38,6 @@ private void _testLeadingPlusMalformed(JsonFactory f, int mode) throws Exception
                 JsonToken t = p.nextToken();
                 assertToken(JsonToken.VALUE_NUMBER_INT, t);
                 // Either one works:
-                
 //                p.getNumberType();
                 p.getIntValue();
                 fail("Should not pass, got: "+t);