Ordered lists can only interrupt paragraphs if they start with 1 (spec 0.26, #55)

Author: robinst

commonmark/src/main/java/org/commonmark/internal/ListBlockParser.java

@@ -48,14 +48,21 @@ public void setTight(boolean tight) {
     /**
      * Parse a list marker and return data on the marker or null.
      */
-    private static ListData parseListMarker(CharSequence line, final int markerIndex, final int markerColumn) {
+    private static ListData parseListMarker(CharSequence line, final int markerIndex, final int markerColumn,
+                                            final boolean inParagraph) {
         CharSequence rest = line.subSequence(markerIndex, line.length());
         Matcher matcher = MARKER.matcher(rest);
         if (!matcher.find()) {
             return null;
         }
 
         ListBlock listBlock = createListBlock(matcher);
+        if (inParagraph && listBlock instanceof OrderedList) {
+            // Ordered lists can only interrupt paragraphs with a start number of 1.
+            if (((OrderedList) listBlock).getStartNumber() != 1) {
+                return null;
+            }
+        }
 
         int markerLength = matcher.end() - matcher.start();
         int indexAfterMarker = markerIndex + markerLength;
@@ -129,8 +136,10 @@ public BlockStart tryStart(ParserState state, MatchedBlockParser matchedBlockPar
             if (state.getIndent() >= Parsing.CODE_BLOCK_INDENT && !(matched instanceof ListBlockParser)) {
                 return BlockStart.none();
             }
-            int nextNonSpace = state.getNextNonSpaceIndex();
-            ListData listData = parseListMarker(state.getLine(), nextNonSpace, state.getColumn() + state.getIndent());
+            int markerIndex = state.getNextNonSpaceIndex();
+            int markerColumn = state.getColumn() + state.getIndent();
+            ListData listData = parseListMarker(state.getLine(), markerIndex, markerColumn,
+                    matchedBlockParser.getParagraphContent() != null);
             if (listData == null) {
                 return BlockStart.none();
             }