[Bug libstdc++/80290] [6/7 Regression] g++ uses unreasonable amount of memory compiling nested string maps

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80290

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 41120
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41120&action=edit
testcase just using <map>

Reduced testcase.