Column Check for Bibtex Parser

CHANGELOG.md

@@ -109,6 +109,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 - We fixed an issue where pasting a PDF URL into the main table caused an import error instead of creating a new entry. [#12911](https://github.com/JabRef/jabref/pull/12911)
 - We fixed an issue where libraries would sometimes be hidden when closing tabs with the Welcome tab open. [#12894](https://github.com/JabRef/jabref/issues/12894)
 - We fixed an issue with deleting entries in large libraries that caused it to take a long time. [#8976](https://github.com/JabRef/jabref/issues/8976)
+- We fixed an issue where comments were sometimes treated as entries causing a warning. [#12929](https://github.com/JabRef/jabref/issues/12929)
 
 ### Removed
 

src/main/java/org/jabref/logic/importer/fileformat/BibtexParser.java

@@ -101,6 +101,7 @@ public class BibtexParser implements Parser {
     private Set<BibEntryType> entryTypes;
     private boolean eof;
     private int line = 1;
+    private int col = 0;
     private ParserResult parserResult;
     private final MetaDataParser metaDataParser;
     private final Map<String, String> parsedBibdeskGroups;
@@ -234,6 +235,10 @@ private ParserResult parseFileContent() throws IOException {
                 break;
             }
 
+            if (col > 1) {
+                continue;
+            }
+
             skipWhitespace();
 
             // Try to read the entry type
@@ -627,21 +632,25 @@ private char[] peekTwoCharacters() throws IOException {
 
     private int read() throws IOException {
         int character = pushbackReader.read();
+        col++;
 
         if (!isEOFCharacter(character)) {
             pureTextFromFile.offerLast((char) character);
         }
         if (character == '\n') {
             line++;
+            col = 0;
         }
         return character;
     }
 
     private void unread(int character) throws IOException {
         if (character == '\n') {
             line--;
+            col = 0;
         }
         pushbackReader.unread(character);
+        col--;
         if (pureTextFromFile.getLast() == character) {
             pureTextFromFile.pollLast();
         }