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Issue with a calculation in Lua

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Hi,
There is an issue with a calulation I did with Lua 5.3.5 and the latest 5.4 beta.
The result of the two lines below is a '-nan'
b = -1.0702700000075937e-05
print( b ^( 1 / 2.19921875 ) )
While this line prints the number '-0.005493842385624'
print( -1.0702700000075937e-05 ^ ( 1 / 2.19921875 ) )
-- Jasper

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