utils: dont break if commonpath throws exception (#1554)

* utils: dont break if commonpath throws exception

Signed-off-by: David Korczynski <david@adalogics.com>

* narrow to value errors

Signed-off-by: DavidKorczynski <david@adalogics.com>

---------

Signed-off-by: David Korczynski <david@adalogics.com>
Signed-off-by: DavidKorczynski <david@adalogics.com>

Author: DavidKorczynski

src/fuzz_introspector/utils.py

@@ -38,7 +38,10 @@ def longest_common_prefix(strs: List[str]) -> str:
     Dummy wrapper function for os.path.commonpath(paths: List[str]) -> str
     Keeping for backward compactibility
     """
-    return os.path.commonpath(strs)
+    try:
+        return os.path.commonpath(strs)
+    except ValueError:
+        return '/'
 
 
 def normalise_str(s1: str) -> str: