[Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803

[rogero at howzatt dot demon.co.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69650

--- Comment #41 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
I have seen the message before: for example from a build with revision 

line-map.c: file "/usr/include/asm/sockios.h" left but not entered

I've only noticed it with builds from gcc-trunk, which I tested with back in
Dec/Jan. I saw this message from some compilation but it seemed benign...

I have not seen this message with builds from gcc 5.3.0 and before, but it is
possible I've simply not noticed as it does gets a bit buried in the build
logs.