[C programmers] Coding error in an expression due to unexpected grouping of arithmetic or logical operators by the compiler. Used esp. of certain common coding errors in C due to the nonintuitively low precedence levels of &, |, ^, <<, and >> (for this reason, experienced C programmers deliberately forget the language's baroque precedence hierarchy and parenthesize defensively). Can always be avoided by suitable use of parentheses. LISP fans enjoy pointing out that this can't happen in their favorite language, which eschews precedence entirely, requiring one to use explicit parentheses everywhere. See aliasing bug, memory leak, memory smash, smash the stack, fandango on core, overrun screw.