This should fix the problem. It appears as though the indentation was being stripped from the program text differently depending on how the error was produced. In the case of a syntax error from the parser, the indentation was maintained until it was printed (in print_error_text, correctly handling the offset value). In contrast, errors from the AST were created with PyErr_ProgramText*, which would also strip the indentation (without mutating any offset value). 

This patch causes the second code path to not strip whitespace. This shouldn't cause I problem (I think), as it seems to only be used to instantiate SyntaxErrors.