Greetings
I am trying to use emplace and it is seemingly leading to memory
corruption. Before I file a bug on DMD Buzilla, I want to find out if I am
doing something wrong or if it is a known issue. I am using a linux box and
this testcase is freaky -- if I comment out either line 20 or line 24, the
segfault vanishes.
Thanks
- Puneet
$ rdmd --force -version=EMPLACE -Isrc -J.. test.d
4000
Segmentation fault (core dumped)
$ rdmd --force -Isrc -J.. test.d
4000
struct bdd {} // 01
class Frop { // 02
int[] _var; // 03
int[] var() { // 04
return _var; // 05
} // 06
this() { // 07
this._var.length = 1; // 08
} // 09
} // 10
class Foo { // 11
long[] nodes; // 12
Frop[] frops; // 13
long[] table; // 14
this() { // 15
nodes.length = 120000; // 16
frops.length = 1; // 17
frops[0] = new Frop(); // 18
initTable(); // 19
zoo(frops[0].var); // 20
} // 21
void initTable() { // 22
import std.stdio; // 23
writeln(4000); // 24
table.length = 40000; // 25
} // 26
void zoo(int[] varset) {} // 27
} // 28
class Bar { // 29
Foo _foo; // 30
this() { // 31
version(EMPLACE) { // 32
import std.conv, core.stdc.stdlib; // 33
enum size_t size = __traits(classInstanceSize, Foo); // 34
assert(size is 32); // 35
void* tmp = core.stdc.stdlib.malloc(size); // 36
if (!tmp) // 37
throw new Exception("Memory allocation failed"); // 38
void[] mem = tmp[0..size]; // 39
_foo = emplace!(Foo)(mem); // 40
} // 41
else { // 42
_foo = new Foo(); // 43
} // 44
} // 45
} // 46
void main() { // 47
auto bar = new Bar; // 48
} // 49
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