I would assume you can't safely do arithmetic within a structure, for instance. As an example, take a struct { char a; char b; char c; char

I would assume you can't safely do arithmetic within a structure, for instance. As an example, take a struct { char a; char b; char c; char *p; char d; } A valgrind error that points at "0 bytes within an area of memory..." would signal an error originating somewhere in the struct, but who knows whether it's p or a.