[Issue 12980] New: Undefined behavior: Assignment of static string to dynamic string

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12980

          Issue ID: 12980
           Summary: Undefined behavior: Assignment of static string to
                    dynamic string
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Mac OS X
            Status: NEW
          Severity: major
          Priority: P1
         Component: DMD
          Assignee: nobody at puremagic.com
          Reporter: yuriy.glukhov at gmail.com

import std.stdio;

char[10] getSomeString()
{
    char[10] result;
    int i = 0;
    for (char a = '0'; a <= '9'; ++a)
    {
        result[i++] = a;
    }
    return result;
}

class A
{
    this()
    {
        m = getSomeString();
    }
    string m;
}

void main()
{
    A a = new A();
    writeln("STRING: ", a.m); // At this point a.m points to somewhere in stack
and thus contains invalid value.
}

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