[Issue 11139] malloc/emplace resulting in memory corruption

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=11139



--- Comment #1 from Puneet Goel <puneet at coverify.org> 2013-09-29 19:33:05 PDT ---
Another reduced testcase. This one does not have dependency on writeln.

class Frop {                                               // 01
  void zoo(int ) { }                                       // 02
}                                                          // 03
class Foo {                                                // 04
  int[] table;                                             // 05
  int[] table2;                                            // 06
  Frop frop;                                               // 07
  this() {                                                 // 08
    frop = new Frop();                                     // 09
    table2.length = 1;                                     // 10
    table.length = 320000;                                 // 11
    frop.zoo(0);                                           // 12
  }                                                        // 13
}                                                          // 14
class Bar {                                                // 15
  Foo foo;                                                 // 16
  this() {                                                 // 17
    version(EMPLACE) {                                     // 18
      import std.conv, core.stdc.stdlib;                   // 19
      enum size_t size = __traits(classInstanceSize, Foo); // 20
      static assert (size % size_t.sizeof is 0);           // 21
      void* tmp = core.stdc.stdlib.malloc(size);           // 22
      if (!tmp)                                            // 23
        throw new Exception("Memory allocation failed");   // 24
      void[] mem = tmp[0..size];                           // 25
      foo = emplace!(Foo)(mem);                            // 26
    }                                                      // 27
    else {                                                 // 28
      foo = new Foo();                                     // 29
    }                                                      // 30
  }                                                        // 31
}                                                          // 32
void main() {                                              // 33
  auto bar = new Bar;                                      // 34
}                                                          // 35

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