Ensure upvalue value is initialized.
Ensure upvalue value is initialized.

Avoids a crash if a GC happens before the upvalue is closed.
daimajia/wren,Nelarius/wren,munificent/wren,Rohansi/wren,lluchs/wren,Nave-Neel/wren,lluchs/wren,lluchs/wren,bigdimboom/wren,minirop/wren,bigdimboom/wren,munificent/wren,Nelarius/wren,minirop/wren,minirop/wren,lluchs/wren,minirop/wren,Nave-Neel/wren,foresterre/wren,Nelarius/wren,munificent/wren,foresterre/wren,bigdimboom/wren,foresterre/wren,daimajia/wren,munificent/wren,Rohansi/wren,Nave-Neel/wren,daimajia/wren,Rohansi/wren,foresterre/wren,minirop/wren,Nave-Neel/wren,munificent/wren,bigdimboom/wren,Nelarius/wren,daimajia/wren,munificent/wren,Rohansi/wren,foresterre/wren,Nelarius/wren