rootvector2 opened a new pull request, #438:
URL: https://github.com/apache/commons-beanutils/pull/438

   `NumberConverter.toNumber(Class, Number)` converts a `Float` or `Double` 
source to `BigInteger` through `BigInteger.valueOf(value.longValue())`, so a 
floating-point magnitude past `long` range silently saturates instead of 
keeping its value: `converter.convert(BigInteger.class, 1e30d)` returns 
`9223372036854775807` and `1e20f` returns the same, not the real magnitude.
   
   the sibling `BigDecimal` branch just above already formats `Float`/`Double` 
with `new BigDecimal(value.toString())` to avoid exactly this, and #401 / #408 
established that `BigInteger` and `BigDecimal` conversions must preserve 
magnitude. this routes floating-point sources through `new 
BigDecimal(value.toString()).toBigInteger()`; integer sources keep the exact 
`longValue()` path and in-range values are unchanged. found while auditing the 
`toNumber` narrowing family after #404, which only added the `Long` and `Float` 
range checks and never touched the `BigInteger` branch.
   
   `BigIntegerConverterTest.testLargeFloatingPointMagnitude` fails before the 
change (`9223372036854775807`) and passes after.
   
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