PROGRAM RUNS AMOK
- GOTO somewhere
- Come-from logic errors
- Problems in table-driven programs
- Executing data
- Jumping to a routine that isn't resident
- Re-entrance
- Variables contain embedded command names
- Wrong returning state assumed
- Exception-handling based exits
- Return to wrong place
- Corrupted stack
- Stack under/overflow
- GOTO rather than RETURN from a subroutine
- Interrupts
- Wrong interrupt vector
- Failure to restore or update interrupt vector
- Failure to block or unblock interrupts
- Invalid restart after an interrupt
PROGRAM STOPS
- Dead crash
- Syntax errors reported at run-time
- Waits for impossible condition, or combination of conditions
- Wrong user or process priority
LOOPS
- Infinite loop
- Wrong starting value for the loop control variable
- Accidental change of the loop control variable
- Wrong criterion for ending the loop
- Commands that do or don't belong inside the loop
- Improper loop nesting
IF, THEN, ELSE, OR MAYBE NOT
- Wrong inequalities (e.g., > instead of >=)
- Comparison sometimes yields wrong result
- Not equal versus equal when there are three cases
- Testing floating point values for equality
- Confusing inclusive and exclusive OR
- Incorrectly negating a logical expression
- Assignment-equal instead of test-equal
- Commands belong inside the THEN or ELSE clause
- Commands that don't belong inside either clause
- Failure to test a flag
- Failure to clear a flag
MULTIPLE CASES
- Missing default
- Wrong default
- Missing cases
- Case should be subdivided
- Overlapping cases
- Invalid or impossible cases
