I'm doing some stuff with the module Astro::Units whose pod suggests to explicitly use bignum. The program works fine until I try doing some simple arithmetic. I can't reproduce the error with an SSCE so here are the errors and the calculations causing them: 
Deep recursion on subroutine "Math::BigFloat::bdiv" at /5.26.2/Math/BigInt.pm line 1867.
Deep recursion on subroutine "Math::BigInt::Calc::_lsft" at /5.26.2/Math/BigFloat.pm line 1948.
Deep recursion on anonymous subroutine at /5.26.2/Math/BigInt/Calc.pm line 1412.
Deep recursion on subroutine "Math::BigInt::bdiv" at /5.26.2/Math/BigInt.pm line 54.
Here's the math and the results when loading and not loading (but not directly using) both bignum and Astro::Units: 
perl -le '$Da=406700; $Dp=356400; $Dm=361918; $pct = ($Da - $Dm) / ($D
+a - $Dp); print $pct'

[download]
0.890298210735586 
perl -Mbignum -le '$Da=406700; $Dp=356400; $Dm=361918; $pct = ($Da - $
+Dm) / ($Da - $Dp); print $pct'

[download]
0.8902982107355864811133200795228628230616 
perl -Mbignum -MAstro::Units -le '$Da=406700; $Dp=356400; $Dm=361918; 
+$pct = ($Da - $Dm) / ($Da - $Dp); print $pct'

[download]
0.8902982 
perl -MAstro::Units -le '$Da=406700; $Dp=356400; $Dm=361918; $pct = ($
+Da - $Dm) / ($Da - $Dp); print $pct'

[download]
0.890298210735586

Can anyone see what's going on here? That third result is puzzling. What could be causing such errors? Thanks!

In reply to Deep recursion on subroutine with bignum and Astro::Units by Anonymous Monk

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