Occasionally after editing, I'll try to compile the source, and will get strange errors. What I find is an "#include" has been inserted into the source. The header appears to be random; in some cases, the file is from a different section of the project tree; other from the global headers (/usr/include/...). 

In the latest instance, "#include <boost/concept_check.hpp>" was inserted into my .c file. At times I have seen headers from other include directories from the project tree. This occurs in both C and C++ sources.


Reproducible: Sometimes

Steps to Reproduce:
1. Do some editing in source
2. Start a build

Actual Results:  
Errors reported do to headers in unrelated context. 

Other times no errors, but doing review of SVN diffs prior to check-in, find irrelevant headers included.


Expected Results:  
No unneeded or irrelevant headers added.


I have seen this for quite some time, so this is not a recent regression.