underflowed

Verb

underflow (third-person singular simple present underflows, present participle underflowing, simple past and past participle underflowed)

1. To trigger the condition in which the value of a computed quantity is smaller than the smallest non-zero value that can be physically stored.
2. To trigger the error condition resulting from attempting to retrieve a value from an empty stack.
   • Upon an attempt to pop an empty stack, the stack underflows […]2022, Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest, Introduction to Algorithms, fourth edition, page 255

See all 5 meanings of underflow