[Bug tree-optimization/90078] [9 Regression] ICE with deep templates caused by overflow

[amker at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90078

--- Comment #19 from bin cheng <amker at gcc dot gnu.org> ---
I will check if the latter fix can be easily backported to GCC-9.