On Tue, 2024-02-13 at 21:35 -0800, Poonai wrote:
> big int panics during text conversion randomly
>
> stack trace:
>
> panic: runtime error: index out of range [1] with length 1
>
> goroutine 2088184 [running]:
> math/big.nat.itoa({0xc01db71500, 0x1, 0x199?}, 0x0, 0xa)
> /usr/local/go/src/math/big/natconv.go:340 +0x3d2
> math/big.(*Int).Text(...)
> /usr/local/go/src/math/big/intconv.go:25
> math/big.(*Int).String(...)
> /usr/local/go/src/math/big/intconv.go:40
>
> It shows up randomly, help me debug
I think you have probably ended up with a zero big.Int with a non-zero
length abs field. This is likely either from unsafe manipulation or a
race.
The crash can be replicated thus https://go.dev/play/p/WV78xvsbn4m
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