[tcljava-user] Serious bug in Jacl log10 method in Jacl 1.4.0

[Bruce J. <nm...@ma...>]

Starting with revision 1.13 of Expression.java the calculation of  
base 10 logarithms in Jacl is seriously incorrect.

Prior to this revision, log10 is calculated (as it should be) by   log 
(x) / log(10)

With version 1.13 this was changed to log( x / log(10) ) which is  
completely wrong.


This bug is present in Jacl 1.4.0, but not in 1.3.2 or earlier.


A quick check for the correct version

expr log10(10)
1.0


the now incorrect code gives

expr log10(10)
1.46855264775