[Issue 3677] New: null dereference with offset not memory- at safe
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Tue Jan 5 07:11:58 PST 2010
http://d.puremagic.com/issues/show_bug.cgi?id=3677
Summary: null dereference with offset not memory- at safe
Product: D
Version: 2.038
Platform: x86_64
OS/Version: Mac OS X
Status: NEW
Severity: normal
Priority: P2
Component: DMD
AssignedTo: nobody at puremagic.com
ReportedBy: michel.fortin at michelf.com
--- Comment #0 from Michel Fortin <michel.fortin at michelf.com> 2010-01-05 10:11:57 EST ---
This supposedly "safe" program under Mac OS X 10.6 doesn't give any error
neither at compile time nor at runtime, yet it isn't memory-safe at all as it
corrupts some part of the memory space.
struct S {
uint[100000] a;
uint b;
}
S* s = null;
@safe void main() {
s.b = 1;
}
This happen because the offset for member "b" is very far, allowing it to falls
on another memory page which happen to exists.
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