------- Comment #6 from manu at gcc dot gnu dot org 2009-07-07 10:25 ------- (In reply to comment #5) > > Thus code is undefined you have an acess of a char array as a struct. > Yes you are only taking the address of an element but it is still > considered an acess by the standards.
I see that users repeatedly fall for this. Could we detect what type is accessed as what and provide an informative note? Something like: warning: dereferencing type-punned pointer might break strict-aliasing rules note: accessing 'char *' as 'structure *' is undefined Andrew, do you think this would be difficult to implement? -- manu at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |manu at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40665