rts430x_lc_sd_eabi.lib trap

Hi,

I've created a new project in CCS 6.0.1 for MSP430F5308.

I've inserted an interrupt handler for a button. 

When tested the button I've found the interrupt is working & arrive to the designated code, when exiting the interrupt 

The interrupt call:

#pragma vector=PORT1_VECTOR
__interrupt void port1ISR(void)
{
          if (P1IFG & BIT5)
          {
     	        //INFO: bottom clicked move to configure MSC.
		LPM3_EXIT; //INFO: exit LPM3 
		configureMSC();
	  }
	  P1IFG = 0;
}

I see the configureMSC function been called & the interrupt handler ends OK.

After a few click (calling over & over to the same function which toggles a led so it is easy to know what works), i've found the system doesn't responds. Than I paused and found out that something is VERY wrong:

in the map file:

                  0000d0a6    0000000c     nwkManagers.obj (.text:spiReadFifo)
                  0000d0b2    00000006     rts430x_lc_sd_eabi.lib : isr_trap.obj (.text:__TI_ISR_TRAP)
                  0000d0b8    00000006     main.obj (.text:_isr:Port_2)

I didn't insert the rts430x_lc_sd_eabi.lib  to the project so I assume the creation of a new project for MSP430F5308 added this by default. 

just to cover the case that id don't respond to interrupt I've created an empty port2 interrupt handler for testing:

// Port 2 interrupt service routine for timing test
#pragma vector=PORT2_VECTOR
__interrupt void Port_2(void)
{
  P2IFG =0;
}

This didn't helped.

1. When I look at the call stack in the pic above I can't understand what caused the trap, please advice on that. 
2. in this link this a similar issue? [I don't think so since I didn't imported ANY project etc']
3. Any advice of what I'm doing wrong will be good..