[Bug c++/79857] cgraph_node::verify_node should call internal_error instead of error

[roland.illig at gmx dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79857

--- Comment #3 from Roland Illig <roland.illig at gmx dot de> ---
Assuming that the diagnostics containing words like "edge" or "BB" are
presented to the GCC user, how are they going to make any use of them?

Or "cgraph_node has wrong clone_of"? As a programmer, I have no idea what this
might mean. Therefore this should be made an internal error, or alternatively
be reworded so that it is understandable to a GCC user who doesn't know
anything about GIMPLE or RTL.