cl/_testrt/cast: error with panic

[luoliwoshang]

goplus/llgo/cl/_testrt/cast a3db8d0

cl/_testrt/cast on  via 🐹 v1.24.10 
❯ llgo run .
WARNING: Using LLGO root for devel: /Users/zhangzhiyang/Documents/Code/goplus/llgo
WARNING: Using LLGO root for devel: /Users/zhangzhiyang/Documents/Code/goplus/llgo
WARNING: Using LLGO root for devel: /Users/zhangzhiyang/Documents/Code/goplus/llgo
panic: error

[0x0253C8C0 github.com/goplus/llgo/cl/_testrt/cast.cvt32Fto8U+0x31, SP = 0x48]
[0x0253CD30 github.com/goplus/llgo/cl/_testrt/cast.main+0x2b, SP = 0x198]
[0x0253CF78 main+0x4, SP = 0x24]
exit status 2