[Bug middle-end/68117] [6 Regression] error: invalid PHI argument <<< Unknown tree: <invalid tree code> >>>

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68117

--- Comment #20 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
I haven't seen this issue since Jason's GC related C++ patches went in:
r230201 and r230202.

But of course this may well be another statistical fluke.