David Nickerson created MATH-1427:
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Summary: Unreachable statements in Complex.abs()
Key: MATH-1427
URL: https://issues.apache.org/jira/browse/MATH-1427
Project: Commons Math
Issue Type: Bug
Affects Versions: 3.6.1
Reporter: David Nickerson
Priority: Minor
This return statement in Complex.abs() is unreachable:
{code:java}
if (FastMath.abs(real) < FastMath.abs(imaginary)) {
if (imaginary == 0.0) {
return FastMath.abs(real);
}
{code}
If imaginary == 0, then there's no way that the preceding condition would be
true. There are two similar inner 'if' statements that were accidentally
switched. Returned values are still correct, but performance suffers.
The attached patch switches these back. Note that we're still protected from
dividing by zero.
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