What are the consequences if the current goroutine's stack exceeds its limit?

If the current goroutine's stack in Go exceeds its limit, automatic stack expansion occurs. Unlike traditional threads with a fixed stack size, goroutine stacks are dynamic and start small (usually 2 KB), increasing as needed.

Consequences:

• The contents of the old stack are copied to a new, larger one.
• This may cause a slight delay during expansion.
• If the stack cannot be expanded (for example, due to memory exhaustion), the program may panic with the error "runtime: goroutine stack exceeds limit".

Thus, exceeding the stack limit does not lead to an immediate crash but to a dynamic increase, which in extreme conditions may cause a panic.