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C++ optimization error


The attached program compiles correctly without optimization. With
optimizations the resulting a.out gives a segmentation fault.

System:
i586-pc-linux-gnulibc1, AMD k6-2, linux-2.2.11, libc-5.4.46

gcc:
Reading specs from /usr/local/lib/gcc-lib/i586-pc-linux-gnulibc1/2.95.1/specs
gcc version 2.95.1 19990809 (prerelease)
(It also happens in gcc-2.95)

Correct options: gcc test.ii
Error options: gcc -O test.ii

greetings,

Mark.

---- original program ----------------------------------------------------

#include <matrix.h>

main()
{
	matrix<fract,3> M;		// when fract is changed to double
					// a.out doesn't core dump with -O
	M[0][0]=M[1][1]=M[2][2]=1;
	M[0][1]=M[0][2]=M[1][0]=M[1][2]=M[2][0]=M[2][1]=0;
}


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`
end


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