Profiling with F3+L while game is frozen spams output with errors

If the game is frozen with /tick freeze, pressing F3+L will immediately start filling the game output with

Tried to pop one too many times! Mismatched push() and pop()?

Tried to pop one too many times! Mismatched push() and pop()?

until profiling finishes.

When it finishes there is a NullPointerException and it says the results cannot be saved.