📃 SLua Alpha

One of my HUDs started producing errors only after I recompiled it from LSL/Mono to LSL/Luau due to an empty string "" being changed to an empty key, after every region crossing, before being passed to llSetLinkPrimitiveParamsFast . I distilled the issue down to this script: list myList = [""]; key someKey; // this must be below myList to reproduce this bug default { touch_start(integer total_number) { if (llListFindList(myList, [(key)""]) != -1) // we found an empty key in the list { llOwnerSay("FAIL: The empty string was changed to an empty key. Resetting..."); llResetScript(); } else llOwnerSay("PASS: The empty string is still an empty string."); } } Steps to reproduce Teleport to any Luau test region. Create an object and attach it to your avatar. Create a new script in that object and paste the above code into the script editor window. Change the compiler to LSL/Luau and then save the script. Click the object. It will output "PASS." Walk into an adjacent Luau test region. Click the object again. It will output "FAIL." Affected versions Luau 2025-03-10.13758278457

Very, very minor bug. Currently "goto" highlights as a keyword in the script editor, and gives the helper text, "Lua goto statement: jumps to a specified label" goto is not implemented in Luau, and this is not me asking for it to be implemented. But right now the script editor is implying that goto will work, and it doesn't. Perhaps there are some other functions from Lua that aren't implemented in Luau where this is also an issue? I couldn't find anything else, but it's possible.

This started happening sometime after yesterday's (Mar 11) Luau test region restarts. Allocating lists that take up as little as 12 kB under Mono, in an otherwise empty script, will cause an out of memory error under LSL-Luau. Repro script: works under LSL-Mono and uses ~16 kB memory (4 kB code + 12 kB from the lists), runs out of memory under LSL-Luau. default { state_entry() { list t1; list t2; list t3; // simply for speed under mono, appending to bigger lists gets slower integer i; for(i = 0; i < 1024; ++i) { t1 += ""; t2 += ""; t3 += ""; } llSleep(0.01); llOwnerSay("memory used: " + (string)llGetUsedMemory()); // would be wrong under Luau anyway } }

I think it crashes the region shortly after "succeeding". b = buffer.create(1024*1022) ll.Say(0, `created, size = {buffer.len(b)}`) will report a buffer of 1046528 bytes being created, and shortly after nothing goes through anymore and the region drops me. 1023*1024 bytes is too much and gets an out of memory error.