tree b9cf6cdaf3c5b3a51c16ef0cf9bb46564e5ce807
parent 5205f073c57ae4b69e90d35c02e3a1a1cca44eb4
author Roberto Ierusalimschy <roberto@inf.puc-rio.br> 1614271176 -0300
committer Roberto Ierusalimschy <roberto@inf.puc-rio.br> 1614271176 -0300

Bug (kind of) in 'isinstack'

The function 'isinstack' tried to work around the undefined behavior
of subtracting two pointers that do not point to the same object,
but the compiler killed to trick. (It optimizes out the safety check,
because in a correct execution it will be always true.)