The original piece of code that triggered this was:
if (!"[A.icon]") // Shitty workaround for a BYOND issue.
var/icon/temp = I
I = icon()
I.Insert(temp, dir = SOUTH)
The bug can be demonstrated with:
world/New()
..()
something("lol")
something()
/proc/something(stuff)
if(!"[stuff]")
world.log << 1
else
world.log << 2
which outputs:
with dreamchecker complaining:
Analyzing proc bodies...
dmtest.dm, line 6, column 4:
error: if condition is always false