[Bug c++/125130] g++ stack overflow ICE when building clksignal 2026-04-30

[ats-gccbugs at offog dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125130

--- Comment #1 from Adam Sampson <ats-gccbugs at offog dot org> ---
Created attachment 64339
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64339&action=edit
Second truncated example

gccbug-202605b.cc is a shorter ICE example, minimised from the same original
source, that isn't valid code, but appears to get stuck in the same recursion
around lazily_declare_fn.

Here's that second example on Compiler Explorer:
https://godbolt.org/z/sE5jfToPM