The stopping function may not be the cause
If a program stops inside a memory-copy routine, the caller may have supplied an invalid pointer or length. The call stack shows the route into the current execution context. The top frame represents the current stop, followed by calling contexts. Ask what conditions the current function expects, then check whether its caller met them. Neither dismissing a library immediately nor investigating only its internals is a reliable strategy. The stack helps place each observation in the surrounding program flow.
Ask one question per frame
For a failed file read, the top frame may identify the operation, the next may explain the buffer and length, and another may show where the filename came from. Inspect the values and assumptions passed across each boundary rather than looking for every variable in every frame. DBG Desk currently displays a read-only frame list with function, address, and source location when available. It does not provide a local-variable browser for a selected frame. Use the displayed route to choose another breakpoint where relevant values can be observed.
A short or unfamiliar stack has several explanations
A shorter-than-expected stack is not always corrupted. Optimization can inline functions or use tail calls, changing the relation between source calls and visible frames. Missing symbols can replace names with addresses or question marks. Corrupt return data can also make unwinding fail, but this is a separate possibility. Check the build, debug information, and nearby call and return instructions before drawing a conclusion from a single view. Missing a name is different from being unable to reconstruct a frame.
Compare normal and failing routes
Stop in the same function for both a successful input and a failing one. A different caller, or a different preparation path from the same caller, can narrow the investigation. Keep the build and input with a stack record because addresses can change after rebuilding. In a multithreaded program, the displayed stack is not the complete state of every thread. First understand the stopped thread, then investigate how its execution relates to the others.
Repeated function names
Recursion can legitimately produce several frames with the same name. To distinguish deep recursion from a missing termination condition, check whether each call makes progress toward the base case. Compare the arguments at entry and immediately before the recursive call. Record whether the problem becomes smaller on each step. The repeated names are a reason to inspect that relationship, not enough on their own to prove an infinite recursion.