I just tried to compile package fbi-2.03-10 with the Intel C compiler.

It said

sane.c(40): warning #592: variable "list" is used before its value is set

The source code is

    wlist = malloc(sizeof(Widget*)*nchildren);
    memcpy(list,children,sizeof(Widget*)*nchildren);

I agree with the compiler.  Suggest new code

    wlist = malloc( wsizeof(Widget*) * nchildren);
    memcpy( wlist, wchildren, wsizeof(Widget*)*nchildren);