A list of lsl-luau vs mono discrepancies observed on luau 2026-07-24 channel #110

float nan = (float)"nan";

llOwnerSay((string)(nan >= 1.0)); // Output: LSO=math error Mono=1 LSL-LUAU=0

llOwnerSay((string)(nan <= 1.0)); // Output: LSO=math error Mono=1 LSL-LUAU=0

integer param(integer p)

{

    return p++ + p;

}

default

{

    state_entry()

    {

        integer a = 1;

        llOwnerSay("1 (Mono = 0): " + (string)((a = 2) == a)); // Output in lsl-luau: 1

        a = 1;

        llOwnerSay("2 (Mono = 1): " + (string)(a++ == a)); // Output in lsl-luau: 0

        llOwnerSay("3 (Mono = 2): " + (string)param(1)); // Output in lsl-luau: 3

        // float->int cast

        float f = 0.7;

        llOwnerSay("4 (Mono = 7): " + (string)((integer)(f * 10.0))); // Output in lsl-luau: 6

        integer i = 16777217;

        float z = 0.0;

        llOwnerSay("5 (Mono=  16777216): " + (string)((integer)(i + z))); // Output in lsl-luau: 16777217

        // bit shifts

        integer s = 32;

        llOwnerSay("6 (Mono = 1): " + (string)(1 << s)); // Output in lsl-luau: 0

        llOwnerSay("7 (Mono = -2147483648): " + (string)(1 << -1)); // Output in lsl-luau: 0

        llOwnerSay("8 (Mono = 4): " + (string)(8 >> 33)); // Output in lsl-luau: 0

    }

}