1 This fix is from the community, details in the following location.

     2 http://lists.research.att.com/pipermail/ast-users/2013q4/004481.html

     3 ---

     4 --- a/src/cmd/ksh93/sh/streval.c	2014-01-22 10:39:11.075964500 +0100

     5 +++ b/src/cmd/ksh93/sh/streval.c	2014-01-22 13:21:35.999184260 +0100

     6 @@ -366,13 +366,17 @@

     7  				num = (Sflong_t)(sp[-1]) / (Sflong_t)(num);

     8  			break;

     9  		    case A_LSHIFT:

    10 -			if(tp[-1]==2)

    11 +			if((long)num >= CHAR_BIT*sizeof(Sfulong_t))

    12 +				num = 0;

    13 +			else if(tp[-1]==2)

    14  				num = U2F((Sfulong_t)(sp[-1]) << (long)(num));

    15  			else

    16  				num = (Sflong_t)(sp[-1]) << (long)(num);

    17  			break;

    18  		    case A_RSHIFT:

    19 -			if(tp[-1]==2)

    20 +			if((long)num >= CHAR_BIT*sizeof(Sfulong_t))

    21 +				num = 0;

    22 +			else if(tp[-1]==2)

    23  				num = U2F((Sfulong_t)(sp[-1]) >> (long)(num));

    24  			else

    25  				num = (Sflong_t)(sp[-1]) >> (long)(num);