struct initialization with partially initialized data crashes

[dlangBugzillaToGithub]

Daniel Davidson reported this on 2013-11-04T11:22:54Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=11440

CC List

• Martin Krejcirik

Description

import std.stdio;

struct Y {
  private immutable(int)[] _data;
}

struct CFS {
  double x = 5;
  Y growth;
}

void main() {
  auto s = CFS(1.0);      // crash
  //auto s = CFS(1, Y()); // crash
  //auto s = CFS(1, Y([])); // works
  writeln(s);
}

If x is an int there is no problem.
If s is not accessed there is no problem, so it dies in the writeln call.

[dlangBugzillaToGithub]

mk commented on 2013-11-04T13:11:15Z

Can't reproduce both on Linux and Windows x86.

[dlangBugzillaToGithub]

burg.basile commented on 2013-11-04T15:09:34Z

import std.stdio;

struct Y {
  private
	immutable(int)[] _data;
	immutable(int)[] _data2;
}

struct CFS {
  double x = 5;
  Y growth;
}

void main() {
  auto s = CFS(1.0);
  writeln(s);
}

runs.

It seems to be more related to the the "private" token.

[dlangBugzillaToGithub]

burg.basile commented on 2013-11-04T15:29:24Z

(In reply to comment #2)
> import std.stdio;
> 
> struct Y {
>   private:
>     immutable(int)[] _data;
>     immutable(int)[] _data2;
> }
> 
> struct CFS {
>   double x = 5;
>   Y growth;
> }
> 
> void main() {
>   auto s = CFS(1.0);
>   writeln(s);
> }
> 
> runs.
> 
> It seems to be more related to the the "private" token.
EDIT:
BTW either with private: or private{*/two or more declarations/*}

[dlangBugzillaToGithub]

k.hara.pg commented on 2013-11-04T18:32:33Z

http://forum.dlang.org/post/nlyjuddqfpdkwfkalxax@forum.dlang.org

> > It doesn't happen with -O, or when compiled with LDC or GDC.
> 
> And it doesn't happen when building with -m32 (I'm on x86_64
> linux).