ARRAY of custom type as parameter

[ldarrambide]

function hwndFF ARRAY(TABPROP)&tabs
if(!hwndFF) hwndFF=win("Mozilla Firefox" "Mozilla*WindowClass" "" 0x804); if(!hwndFF) ret -1
TABPROP& x=0
int i=0
int r=-1
Acc a.Find(hwndFF "PAGETAB" "" "class=MozillaWindowClass" 0x1004)
rep
if(a.Role!ROLE_SYSTEM_PAGETAB) goto next ;;[ + ] button
x=tabs[]
x.name=a.Name <=================== using debugger (f5) the function goes to the last line of code (err+ ret -1) when reaching this line. Why?
........

err+ ret -1