It's in poppler-0.10.1/test/pdf-inspector.cc at line 44. It's still in the live tree as I type this (I checked with cgit). Every compiler in creation accepts this, but I compile with gcc -pedantic, which (correctly) complains about the trailing comma. I think the menu of components for reporting bugs against should include a "tests" option. A patch is attached.
You forgot the patch, but that one was easy so i could do it ;-) Thanks for reporting!
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