Message5126

The issue turns out is the inability for the interactive interpreter 
to raise a SyntaxError if a non-indented line follows (for example) a 
for loop or function declaration.

The following code reproduces the scenario:
>>> for i in range(5):
...    print i
... print 'Should raise Syntax Error'
...
...

So does:
>>> def myfunction():
...    print 'Hello World'
... print 'Should raise Syntax Error'
...
...

Extra dots are me hitting enter eky with no SyntaxError being 
generated by the last print statement.