David T. Lewis uploaded a new version of Kernel to project The Trunk:
http://source.squeak.org/trunk/Kernel-nice.453.mcz

==================== Summary ====================

Name: Kernel-nice.453
Author: nice
Time: 28 May 2010, 9:37:49.978 pm
UUID: 5961f8b3-0010-b643-b1d1-56bd1e657937
Ancestors: Kernel-ar.452

After recent vwnc post, don't let LargeInteger ln overflow.
Same for Fraction with LargeInteger.
Also avoid loss of precision due to gradual underflow.

=============== Diff against Kernel-ar.452 ===============

Item was added:
+ ----- Method: Integer>>ln (in category 'mathematical functions') -----
+ ln
+ 	"This function is defined because super ln might overflow."
+ 	| res h |
+ 	self <= 0 ifTrue: [self error: 'ln is only defined for x > 0'].
+ 	res := super ln.
+ 	res isFinite ifTrue: [^res].
+ 	h := self highBit.
+ 	^2 ln * h + (self / (1 << h)) asFloat ln!

Item was added:
+ ----- Method: Fraction>>ln (in category 'mathematical functions') -----
+ ln
+ 	"This function is defined because super ln might overflow.
+ 	Note that < 1 is tested before converting to float in order to avoid precision loss due to gradual underflow."
+ 	| res int |
+ 	self < 1 ifTrue: [^self reciprocal ln negated].
+ 	self <= 0 ifTrue: [self error: 'ln is only defined for x > 0'].
+ 	res := super ln.
+ 	res isFinite ifTrue: [^res].
+ 	int := self integerPart.
+ 	^int ln + (self / int) ln!