Hi Everyone,

After I switched to DMD 2067 my code that previously worked began crashing.
If I change the return statement in the matrixOrtho function

from:
	return Matrix(...);
to:
	Matrix m = Matrix(...);
	return m;

then the error won't occur anymore. What is going on?

Thank you.

import std.math;
import std.stdio;

struct Matrix {
	float m00, m01, m02, m03;
	float m10, m11, m12, m13;
	float m20, m21, m22, m23;
	float m30, m31, m32, m33;

	this(float m00, float m01, float m02, float m03,
		 float m10, float m11, float m12, float m13,
		 float m20, float m21, float m22, float m23,
		 float m30, float m31, float m32, float m33) nothrow pure @nogc {

		 this.m00 = m00; this.m01 = m01; this.m02 = m02; this.m03 = m03;
		 this.m10 = m10; this.m11 = m11; this.m12 = m12; this.m13 = m13;
		 this.m20 = m20; this.m21 = m21; this.m22 = m22; this.m23 = m23;
		 this.m30 = m30; this.m31 = m31; this.m32 = m32; this.m33 = m33;
	 }
}

void main(string[] args) {

	float width = 800f;
	float height = 600f;
	float near = -5f;
	float far = 10f;

	float hw = width / 2f;
	float hh = height / 2f;

	Matrix ortho = matrixOrtho(-hw, hw, -hh, hh, near, far);
}

Matrix matrixOrtho(float left, float right, float bottom, float top, float near, float far) /* pure @nogc */ {
	debug {
		FloatingPointControl fpCtrl;
		fpCtrl.enableExceptions(FloatingPointControl.severeExceptions);
	}

	float doubledNear = near*2f;
	float farMinusNear = far - near;
	float rightMinusLeft = right - left;
	float topMinusBottom = top - bottom;
	

	return Matrix(2f / rightMinusLeft, 0f, 0f, -(right + left)/rightMinusLeft,
		0f, 2f / topMinusBottom, 0f, -(top + bottom)/topMinusBottom,
		0f, 0f, -2f / farMinusNear, -(far + near)/farMinusNear,
		0f, 0f, 0f, 1f);

	//Matrix m = Matrix(2f / rightMinusLeft, 0f, 0f, -(right + left)/rightMinusLeft,
	//	0f, 2f / topMinusBottom, 0f, -(top + bottom)/topMinusBottom,
	//	0f, 0f, -2f / farMinusNear, -(far + near)/farMinusNear,
	//	0f, 0f, 0f, 1f);

	//return m;
}


Error report:

object.Error@(0): Invalid Floating Point Operation
----------------
0x00402340
0x004020E2
0x004029E2
0x004029B7
0x004028CF
0x004022D7
0x758D7C04 in BaseThreadInitThunk
0x77ADB54F in RtlInitializeExceptionChain
0x77ADB51A in RtlInitializeExceptionChain
object.Error@(0): Invalid Floating Point Operation
----------------
0x00402340
0x004020E2
0x004029E2
0x004029B7
0x004028CF
0x004022D7
0x758D7C04 in BaseThreadInitThunk
0x77ADB54F in RtlInitializeExceptionChain
0x77ADB51A in RtlInitializeExceptionChain
object.Error@(0): Invalid Floating Point Operation
----------------
0x00406E5B
0x004029C5
0x004028CF
0x004022D7
0x758D7C04 in BaseThreadInitThunk
0x77ADB54F in RtlInitializeExceptionChain
0x77ADB51A in RtlInitializeExceptionChain

On 4/16/15 10:23 AM, ref2401 wrote:
> Hi Everyone,
>
> After I switched to DMD 2067 my code that previously worked began crashing.
> If I change the return statement in the matrixOrtho function
>
> from:
>      return Matrix(...);
> to:
>      Matrix m = Matrix(...);
>      return m;
>
> then the error won't occur anymore. What is going on?
>

Builds and runs fine for me. What is your OS and build command?

-Steve

> Builds and runs fine for me. What is your OS and build command?
>
> -Steve

Win 8.1

dmd main.d -ofmain.exe -debug -unittest -wi
if %errorLevel% equ 0 (main.exe)

On Thursday, 16 April 2015 at 15:00:39 UTC, ref2401 wrote:
>> Builds and runs fine for me. What is your OS and build command?
>>
>> -Steve
>
> Win 8.1
>
> dmd main.d -ofmain.exe -debug -unittest -wi
> if %errorLevel% equ 0 (main.exe)

Reduced case:

struct S
{
   float f;

}

On Thursday, 16 April 2015 at 20:27:46 UTC, rumbu wrote:
Hit send by accident :)


Reduced case:

struct S {
    float f; //or double or real
    this(float f) {
       this.f = f;
    }
}

S foo() {
   return S(0f);
}

void main() {
  auto s = foo();
}

Win 8.1 also, 32 and 64 bit, debug or release, same exception

On 4/16/15 4:32 PM, rumbu wrote:
> On Thursday, 16 April 2015 at 20:27:46 UTC, rumbu wrote:
> Hit send by accident :)
>
>
> Reduced case:
>
> struct S {
>      float f; //or double or real
>      this(float f) {
>         this.f = f;
>      }
> }
>
> S foo() {
>     return S(0f);
> }
>
> void main() {
>    auto s = foo();
> }
>
> Win 8.1 also, 32 and 64 bit, debug or release, same exception

Thanks, please file a bug, make it Windows specific, as I did not get the exception on OSX.

-Steve

>
> Thanks, please file a bug, make it Windows specific, as I did not get the exception on OSX.
>
> -Steve


Done: https://issues.dlang.org/show_bug.cgi?id=14452