https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58687

Neil Booth <neilb at protonmail dot ch> changed:

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                 CC|                            |neilb at protonmail dot ch

--- Comment #36 from Neil Booth <neilb at protonmail dot ch> ---
I read the standard for #line differently to the submitter.  It says:

A preprocessing directive of the form
# line digit-sequence new-line
causes the implementation to behave as if the following sequence of source
lines begins with a source line that has a line number as specified by the
digit sequence

The "following sequence of source lines" therefore begins after the new-line
terminating the #line directive.  Therefore #line __LINE__ as a simple
one-liner actually causes a decrement in the line number of the line after
#line compared to if the #line didn't exist, as it gets the line number of the
#line line.

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