[Bug libstdc++/80183] [7 Regression] Conditional jump or move depends on uninitialised value: std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80183

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 41052
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41052&action=edit
testcase. valgrind clang-format bench.ii