[Issue 8079] New: Memory corruption on stack-allocated temporary static arrays

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8079

           Summary: Memory corruption on stack-allocated temporary static
                    arrays
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: hsteoh at quickfur.ath.cx


--- Comment #0 from hsteoh at quickfur.ath.cx 2012-05-10 12:00:55 PDT ---
Code:
        import std.stdio;
        struct S {
                short[4] x;
                this(short[4] args...) {
                        x[] = args[];
                }
                bool opEquals(in S s) const {
                        for (auto i=0; i < 4; i++) {
                                if (this.x[i] != s.x[i])
                                        return false;
                        }
                        return true;
                }
        }
        void main() {
                assert(S(1,2,3,4) == S(1,2,3,4));
        }

Output: with dmd -m64, the assertion fails. Inserting writeln's show that the
elements of s in opEquals() are garbage values. Trying to print out the entire
array of this or s causes a segfault.

On dmd -m32, there is no problem.

Not sure if this is related to bug 5570.

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