const math.MinInt32

4 uses

	math (current package)
		const.go#L49: 	MinInt32  = -1 << 31
		logb.go#L36: 		return MinInt32

	math/big
		float.go#L98: 	MinExp  = math.MinInt32  // smallest supported exponent

	github.com/vmihailenco/msgpack/v5
		encode_number.go#L139: 	if n >= math.MinInt32 {