Using Pow in C++ MinGW. Works hard coded but not with variables

This is hopefully a simple linker issue but I've spent hours searching and haven't moved forward in that time. I'm trying to use

 #include <cmath>
 double aA = 2;
 double result = pow((double)2.0,(double)aA);

I get no error messages and it compiles without issue. But an unrelated grid I'm drawing with openGL doesn't display. If i substitute the aA for 2 then it displays the grid. Like

 #include <cmath>
 double aA = 2;
 double result = pow((double)2.0,(double)2);

This outputs 4 as expected. The previous example outputs nothing. It's as if the program hangs but there are no errors.

This computation isn't used anywhere and in fact just sits in main (or anywhere else) and the variables are unique and are unused.

I'm using code::blocks and minGW GNU GCC compiler in Windows 7. -g -Wall - WExtra

Rendering with glew + freeglut and everything else works until i use a variable with pow.

I've tried every combination of casting I can think of and I've tried powf with the exact same result. I'm using sqrt and other functions so believe that the inclusion is working. I've also tried math.h but get the same problem.

I have never wished to see an error message from a compiler more so than I do right now.

So 1. Why am I not getting an error when it looks like its stopping the whole program in its tracks? And 2. What have I missed to get pow() working with variables?

Update : After creating a new project and trying it out I have no issues so there must be something in my setup that's interfering. I'll keep experimenting. Thanks for the quick responses things sure move fast around here!

Update 2:

Very strange.

  float aAs = 1.0;
  float amplitudeA = (float)pow((float)2.,(float)aAs);

  char str[50];
  int test = (int) (amplitudeA);
  sprintf (str, "out - %d", test);
  MessageBox(NULL,str,NULL,NULL);

This outputs 2 in the message box. Then my grid draws and the program behaves. If i comment out only the message box like so:

  float aAs = 1.0;
  float amplitudeA = (float)pow((float)2.,(float)aAs);

  char str[50];
  int test = (int) (amplitudeA);
  sprintf (str, "out - %d", test);
  //MessageBox(NULL,str,NULL,NULL);

No drawing of my grid. What could be causing this?

  char str[50];
  int test = (int) (1);
  sprintf (str, "out - %d", test);
  MessageBox(NULL,str,NULL,NULL);

  float aAs = 1.0;
  float amplitudeA = (float)pow((float)2.,(float)aAs);

Swapping the message box over recreates the issue. No grid drawn. It's as if focus needs to be taken away from the program when I'm using a variable in pow. I'm completely baffled.

Another Update : I temporarily got around it by writing my own simple powerOf function. But now I'm having the same issue with the cos() function.

Can anyone tell me if there is something wrong with that image? This issue has to stem from incorrect linking. Is that what you would expect from hovering over coz in code::blocks with gcc?

This a error that occurs only when running through the program with a bad cos call. Interesting that I've been using cos for camera calculations since I started this app with no issue.

Error #667: UNADDRESSABLE ACCESS: reading 0x00000003-0x00000007 4 byte(s)
# 0 ntdll.dll!RtlImageNtHeader          +0x124c   (0x77ca43d0 <ntdll.dll+0x343d0>)
# 1 ntdll.dll!RtlImageNtHeader          +0x422    (0x77ca35a7 <ntdll.dll+0x335a7>)
# 2 ntdll.dll!RtlImageNtHeader          +0x30d    (0x77ca3492 <ntdll.dll+0x33492>)
# 3 KERNEL32.dll!HeapFree               +0x13     (0x775e14dd <KERNEL32.dll+0x114dd>)
# 4 atioglxx.dll!atiPPHSN               +0x11afaa (0x66538f3b <atioglxx.dll+0xeb8f3b>)
# 5 atioglxx.dll!DrvSwapBuffers         +0x33fb   (0x6569b9cc <atioglxx.dll+0x1b9cc>)
# 6 atioglxx.dll!DrvSwapBuffers         +0x3cad   (0x6569c27e <atioglxx.dll+0x1c27e>)
# 7 atioglxx.dll!DrvSwapBuffers         +0x7c57   (0x656a0228 <atioglxx.dll+0x20228>)
# 8 atioglxx.dll!DrvSwapBuffers         +0x12c    (0x656986fd <atioglxx.dll+0x186fd>)
# 9 atioglxx.dll!DrvValidateVersion     +0x28     (0x65697c19 <atioglxx.dll+0x17c19>)
#10 OPENGL32.dll!wglSwapMultipleBuffers +0xc5d    (0x66c8af0b <OPENGL32.dll+0x3af0b>)
#11 OPENGL32.dll!wglSwapMultipleBuffers +0xe45    (0x66c8b0f3 <OPENGL32.dll+0x3b0f3>)
Note: @0:00:05.233 in thread 3136
Note: instruction: mov    0x04(%ecx) -> %ecx

Solved. There was an uninitialized variable that was sitting at the bottom of the vertex buffer object I was using to draw the grid. For whatever reason feeding a variable to one of the math functions caused unexpected results in this buffer object.

Thanks to Angew an Kos for pointing me towards memory.