Invalidation (Debugging with GDB)

From Get docs
Gdb/docs/latest/gdb/Invalidation


28.5 Invalidation Notices

The following annotations say that certain pieces of state may have changed.

^Z^Zframes-invalid

The frames (for example, output from the backtrace command) may have changed.

^Z^Zbreakpoints-invalid

The breakpoints may have changed. For example, the user just added or deleted a breakpoint.