gistfile1.txt

fn decCountInc(self: ?*SnekObject, allocator: std.mem.Allocator) void {
        if (self == null) {
            return;
    }
        self.?.referenceCount -= 1;
        if (self.?.referenceCount == 0) {
            SnekObject.refCountFree(self.?, allocator);
        }
        
 }


test "testing decrement ref count" {
    const allocator = std.testing.allocator;
    const x = SnekObject.newSnekInteger(allocator, 1);
    try expect(x.?.referenceCount == 1);
    SnekObject.refCountInc(x);
    SnekObject.decCountInc(x, allocator);
    try expect(x.?.referenceCount == 1);
    SnekObject.decCountInc(x, allocator);
    // If I call this multiple times after this like this
  SnekObject.decCountInc(x, allocator);
  SnekObject.decCountInc(x, allocator);
// This will result in Segfault
}

Thank you @Zorgatone
This is really helpful