that's why it's a "Brain teaser" and not a "compiler teaser." If you were inspecting code without a compiler it's easier to miss. The standard '-Wall -Werror'

that's why it's a "Brain teaser" and not a "compiler teaser." If you were inspecting code without a compiler it's easier to miss. The standard '-Wall -Werror' catches it (arguably, it'd be nice if everyone _at least_ did -Wall by default).