Fix an infinite loop issue parsing numbers outside of 0-9 fixes #639

comicapi/filenamelexer.py

@@ -146,7 +146,8 @@ class Lexer:
         return False
 
     # AcceptRun consumes a run of runes from the valid set.
-    def accept_run(self, valid: str | Callable[[str], bool]) -> None:
+    def accept_run(self, valid: str | Callable[[str], bool]) -> bool:
+        initial = self.pos
         if isinstance(valid, str):
             while self.get() in valid:
                 continue
@@ -155,11 +156,13 @@ class Lexer:
                 continue
 
         self.backup()
+        return initial != self.pos
 
     def scan_number(self) -> bool:
         digits = "0123456789.,"
 
-        self.accept_run(digits)
+        if not self.accept_run(digits):
+            return False
         if self.input[self.pos] == ".":
             self.backup()
         self.accept_run(str.isalpha)

testing/filenames.py

@@ -438,6 +438,21 @@ names: list[tuple[str, str, dict[str, str | bool], tuple[bool, bool]]] = [
         },
         (False, False),
     ),
+    (
+        "Blue Beetle #½.cbr",
+        "½",
+        {
+            "archive": "cbr",
+            "issue": "½",
+            "series": "Blue Beetle",
+            "title": "",
+            "volume": "",
+            "year": "",
+            "remainder": "",
+            "issue_count": "",
+        },
+        (False, True),
+    ),
     (
         "Monster Island vol. 2 #2.cbz",
         "Example from userguide",