------- Comment #4 from jakub at gcc dot gnu dot org 2010-06-24 11:51 ------- note->type == 10 is: *d = '\n'; /* A sentinel note that should never be processed. */ add_line_note (buffer, d + 1, '\n'); buffer->next_line = s + 1; created. But, as this PR lacks a testcase (well, the testcase depends on a proprietary header file not included here), it is hard to guess what's going on. Can you see if doing just cp /usr/include/stdlib.h /tmp/stdlib.h gcc -E -traditional-cpp /tmp/stdlib.h If yes, can you distill a smaller testcase from it (ideally at most a few lines)?
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39213