I was doing some app debugging tonight, and noticed what appears to be a memory leak in vfprintf(). I've tested it on -CURRENT and -STABLE; any program that makes use of vfprintf() (ie, uses printf) appears to have a 4096 byte memory leak. The memory is allocated on the first vfprintf() call and is never deallocated. I've observed the memory leak on -CURRENT as of 30 Jul and -STABLE as of 29 Jul. It was also reported, indirectly, on ports@ on 21 Jul. The memory leak has been observed using dmalloc (devel/dmalloc; dmalloc.com) and NJAMD (sourceforge.net/projects/njamd). I suspect that there may be a similar leak in vsprintf() as well. I did file a PR (misc/55181), but I thought I should maybe give a shout-out to the list as well.
-Ryan T. Dean
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