commit bash-20130111 snapshot

tests/arith.right

@@ -231,6 +231,9 @@ ok
 1
 1 2 3 4 5 6 7
 0 1 2 3 4 5 6 7
+0
+0, 0
+0, 1
 8 12
 ./arith.tests: line 286: ((: x=9 y=41 : syntax error in expression (error token is "y=41 ")
 ./arith.tests: line 290: a b: syntax error in expression (error token is "b")

tests/arith6.sub

@@ -44,3 +44,9 @@ n=0 ; (( (a[n]=++n)<7&&a[0])); echo "${a[@]:1}"
 n=0 a="(a[n]=++n)<7&&a[0]"; ((a[0])); echo "${a[@]:1}"
 
 n=0 a="(a[n]=n++)<7&&a"; ((a)); echo "${a[@]:1}"
+
+# bugs with lvalue caching and pointer aliasing through bash-4.2
+echo $(( a=(y[0] + y[1]) & 0xff, b=(y[2] + y[3]) & 0xff, a << 8 | b))
+echo $a, $b
+((a = y[0], b = 1 ))
+echo $a, $b