Handle weird GDB 7.7 issue with corefiles

pwndbg/memory.py

@@ -7,6 +7,7 @@ import gdb
 import pwndbg.arch
 import pwndbg.compat
 import pwndbg.typeinfo
+import traceback
 
 PAGE_SIZE = 0x1000
 PAGE_MASK = ~(PAGE_SIZE-1)
@@ -21,6 +22,9 @@ def read(addr, count, partial=False):
         if not partial:
             raise
 
+        if not hasattr(e, 'message'):
+            e.message=str(e)
+
         stop_addr = int(e.message.split()[-1], 0)
         if stop_addr != addr:
             return read(addr, stop_addr-addr)