Reset TABLECELLBOUNDARIES with ordinary opener chains.

This is needed because special handling of '|' is now done also if the
wiki-links extension is enabled so the chain is populated even with that
extension.

Fixes #174.

CHANGELOG.md

@@ -49,9 +49,9 @@ Fixes:
    Fix quadratic time behavior caused by unnecessary lookup for link reference
    definition even if the potential label contains nested brackets.
 
- * [#173](https://github.com/mity/md4c/issues/173):
-   Fix broken internal state invoked by devilish combination of syntax
-   constructions.
+ * [#173](https://github.com/mity/md4c/issues/173),
+   [#174](https://github.com/mity/md4c/issues/174):
+   Multiple bugs identified with oss-fuzz were fixed.
 
 
 ## Version 0.4.8

src/md4c.c

@@ -192,7 +192,7 @@ struct MD_CTX_tag {
 #define TILDE_OPENERS_2                         (ctx->mark_chains[10])
 #define BRACKET_OPENERS                         (ctx->mark_chains[11])
 #define DOLLAR_OPENERS                          (ctx->mark_chains[12])
-#define OPENERS_CHAIN_FIRST                     2
+#define OPENERS_CHAIN_FIRST                     1
 #define OPENERS_CHAIN_LAST                      12
 
     int n_table_cell_boundaries;
@@ -2650,6 +2650,10 @@ md_rollback(MD_CTX* ctx, int opener_index, int closer_index, int how)
     int i;
     int mark_index;
 
+    fprintf(stderr, "md_rollback: %d ... %d [%s]\n",
+            ctx->marks[opener_index].beg, ctx->marks[closer_index].beg,
+            (how == MD_ROLLBACK_ALL ? "all" : "crossing"));
+
     /* Cut all unresolved openers at the mark index. */
     for(i = OPENERS_CHAIN_FIRST; i < OPENERS_CHAIN_LAST+1; i++) {
         MD_MARKCHAIN* chain = &ctx->mark_chains[i];
@@ -3439,6 +3443,8 @@ md_resolve_links(MD_CTX* ctx, const MD_LINE* lines, int n_lines)
         MD_LINK_ATTR attr;
         int is_link = FALSE;
 
+        fprintf(stderr, "md_resolve_links: %d ... %d\n", opener->beg, closer->beg);
+
         if(next_index >= 0) {
             next_opener = &ctx->marks[next_index];
             next_closer = &ctx->marks[next_opener->next];