--- a/bin/ix.py	Fri Jul 09 13:45:04 2021 +0000
+++ b/bin/ix.py	Fri Jul 09 13:45:43 2021 +0000
@@ -68,7 +68,8 @@
   nb=file.readinto(bv)
   file.close()
   if nb!=length:
-    print("losing",file.name,length,nb,file=sys.stderr)
+    raise ValueError("Chunk read losing: %s, got %s expected %s at %s"%(file.name,
+                                                                  nb,length,offset))
   if whole and options.zipped:
     _output(bv)
     return
@@ -206,11 +207,16 @@
       if m is None:
         if l.find('/robotstxt/')>-1:
           continue
-        print("index line problem: \"%s\""%l.lstrip(),file=sys.stderr)
+        print("index line problem: \"%s\""%l,file=sys.stderr,end='')
         exit(2)
       f=FPAT%(m[3:7])
-      process(pa,buf,f,
-              int(m[2]),int(m[1]),whole)
+      try:
+        process(pa,buf,f,
+                int(m[2]),int(m[1]),whole)
+      except Exception as e:
+        print("Process fail: %s, input line:\n %s"%(e,l),
+              file=sys.stderr,end='')
+        exit(3)
   elif pa.length is not None:
     print(pa.filename,file=sys.stderr)
     process(pa,buf,FPAT%tuple(pa.filename.split('/')),