sweep: #5749 JobSanity doesn't handle input sanboxes named "LFN:"

Author: chrisburr

src/DIRAC/WorkloadManagementSystem/Executor/JobSanity.py

@@ -139,7 +139,7 @@ def checkInputSandbox(self, jobState, manifest):
                 sbsToAssign.append((isb, "Input"))
             if isb.startswith("LFN:"):
                 self.jobLog.debug("Found a LFN sandbox", isb)
-                if isb[4] != "/":  # the LFN does not start with /
+                if len(isb) < 5 or isb[4] != "/":  # the LFN does not start with /
                     return S_ERROR("LFNs should always start with '/'")
         numSBsToAssign = len(sbsToAssign)
         if not numSBsToAssign: