Scope issue using rewriter

[DerekMuk]

First, thanks for your write up, it has helped a ton while trying to get my head around Clang. I do think there is a bug in example.cpp though. At the end of main we have

// print out the rewritten source code ("rewriter" is a global var.) rewriter.getEditBuffer(rewriter.getSourceMgr().getMainFileID()).write(errs());

It's true that rewriter is a global variable, but the source manager came from CompilerInstance, which is scoped - and is out of scope by the end of main(). This means getSourceMgr in the above line will return an address to a freed object.

I moved these lines to the end of HandleTranslationUnit, where the CompilerInstance is still valid. That seems to work well. Thanks again for the effort you've put into this tutorial.