FIXED: Checking for metadata was partially erasing token tree and leaving engine...

diff --git a/Sources/libMultiMarkdown/mmd.c b/Sources/libMultiMarkdown/mmd.c
index cf28f6bf299cadafcaebd3152b987cf490282e8d..9df82781ec9c07f62a20f699f00c83d27f95656b 100644 (file)
--- a/Sources/libMultiMarkdown/mmd.c
+++ b/Sources/libMultiMarkdown/mmd.c
@@ -2258,6 +2258,7 @@ bool mmd_d_string_has_metadata(DString * source, size_t * end) {
 /// Does the text have metadata?
 bool mmd_engine_has_metadata(mmd_engine * e, size_t * end) {
        bool result = false;
+       token * old_root;
 
        if (!e) {
                return false;
@@ -2274,10 +2275,8 @@ bool mmd_engine_has_metadata(mmd_engine * e, size_t * end) {
                return false;
        }
 
-       // Free existing parse tree
-       if (e->root) {
-               token_tree_free(e->root);
-       }
+       // Preserve existing parse tree (if any)
+       old_root = e->root;
 
        // Tokenize the string (up until first empty line)
        token * doc = mmd_tokenize_string(e, 0, e->dstr->currentStringLength, true);
@@ -2297,6 +2296,9 @@ bool mmd_engine_has_metadata(mmd_engine * e, size_t * end) {
                token_tree_free(doc);
        }
 
+       // Restore previous parse tree
+       e->root = old_root;
+
        return result;
 }