Suppress overflow warning in bop.t.

There is a constant designed to exercise the limits of a 64-bit
integer that causes an overflow when IVs are 32 bits.  The warning
happens at compile time and we don't know yet that we will never
execute the 64-bit path at run time.

diff --git a/t/op/bop.t b/t/op/bop.t
index c9bf195..14e57ba 100644 (file)
--- a/t/op/bop.t
+++ b/t/op/bop.t
@@ -622,6 +622,7 @@ is $^A, "123", '~v0 clears vstring magic on retval';
     # not necessarily the ideal behavior, but that is what is happening.
     if ($w == 64) {
         no warnings "portable";
+        no warnings "overflow"; # prevent compile-time warning for ivsize=4
         is(-1 << 1, 0xFFFF_FFFF_FFFF_FFFE,
            "neg UV (sic) left shift  = 0xFF..E");
         is(-1 >> 1, 0x7FFF_FFFF_FFFF_FFFF,