[pypy-svn] r5272 - pypy/trunk/src/pypy/objspace/flow

[arigo at codespeak.net]

Author: arigo
Date: Thu Jun 24 18:42:59 2004
New Revision: 5272

Modified:
   pypy/trunk/src/pypy/objspace/flow/flowcontext.py
Log:
Useful assertion message for debugging.


Modified: pypy/trunk/src/pypy/objspace/flow/flowcontext.py
==============================================================================
--- pypy/trunk/src/pypy/objspace/flow/flowcontext.py	(original)
+++ pypy/trunk/src/pypy/objspace/flow/flowcontext.py	Thu Jun 24 18:42:59 2004
@@ -55,7 +55,12 @@
         
     def append(self, operation):
         operation.result = self.listtoreplay[self.index].result
-        assert operation == self.listtoreplay[self.index]
+        assert operation == self.listtoreplay[self.index], (
+            '\n'.join(["Not generating the same operation sequence:"] +
+                      [str(s) for s in self.listtoreplay[:self.index]] +
+                      ["  ---> | while repeating we see here"] +
+                      ["       | %s" % operation] +
+                      [str(s) for s in self.listtoreplay[self.index:]]))
         self.index += 1
 
     def finished(self):