from the docs:

CAVEATS

Do not try to be clever to insert some operations in between switching
+ libraries:
...
This will create objects with numbers stored in two different backend 
+libraries, and VERY BAD THINGS will happen when you use these togethe
+r:
[download]

so maybe better use ->bfloor() instead of int !?! :)

update

¹) but curiosity killed my cat: ;-)

code

#!/usr/bin/perl -w
use strict;
use Math::BigFloat ':constant';
use Data::Dump qw/pp/;

print "150 / 0.75 == ", 150 / 0.75, "\n";
print "150.5->bfloor() == ", 150.5->bfloor() / 0.75, "\n";
print "150 / 3.75 == ", 150 / 3.75, "\n";
print "150.5->bfloor() / 3.75 == ", 150.5->bfloor() / 3.75, "\n";

my $float=3.1415926;
pp $float;
pp $float->bfloor();
pp int($float);
[download]

150 / 0.75 == 200
150.5->bfloor() == 200
150 / 3.75 == 40
150.5->bfloor() / 3.75 == 40
bless({ _e => [7], _es => "-", _m => [1415926, 3], sign => "+" }, "Mat
+h::BigFloat")
bless({ _e => [0], _es => "+", _m => [3], sign => "+" }, "Math::BigFlo
+at")
bless({ sign => "+", value => [3] }, "Math::BigInt")
[download]

Please note that int produces an object of type Math::BigInt which was never used !!!

Not sure if Math::BigFloat should better try to overwrite CORE::int() differently...

footnote

¹) nope it's overwritten, see update and following discussion.

you shouldn't use int

Math::BigFloat overloads int(), so it's ok to use it.
However, the overloaded int() function returns a Math::BigInt object. (I don't see any need for it to do that ... it just makes things confusing.)

Anyway, *that*, of course, brings us to the caveat you mentioned.

Cheers,
Rob

> However, the overloaded int() function returns a Math::BigInt object.

agreed, see my update in the meantime.

> (I don't see any need for it to do that ... it just makes things confusing.)

Math::BigInt is mentioned quite often in the docs, e.g.

Math library

Math with the numbers is done (by default) by a module called Math::Bi
+gInt::Calc. This is equivalent to saying:
[download]

So I suppose there is some intended interoperability between these modules.

Obviously a good reason for a bug report, though my impression is that the whole thing will need a redesigned.

edit

Or maybe good case of tl;dr... there is really much stuff to read and I'm still mid-coffee ... ;-)

Cheers Rolf

( addicted to the Perl Programming Language)

bignum

use bignum;
print "150 / 0.75 == ", 150 / 0.75, "\n";
print "(int(150.5)) / 0.75 == ", (int(150.5)) / 0.75, "\n";
print "150 / 3.75 == ", 150 / 3.75, "\n";
print "(int(150.5)) / 3.75 == ", (int(150.5)) / 3.75, "\n";
__END__
150 / 0.75 == 200
(int(150.5)) / 0.75 == 200
150 / 3.75 == 40
(int(150.5)) / 3.75 == 40
[download]

and

use Data::Dump qw/ dd /; use bignum; dd( (int(150.5)) / 3.75 )
__END___
bless({ _e => [1], _es => "+", _m => [4], sign => "+" }, "Math::BigFlo
+at")
[download]