[tex-eplain] enablehyperlinks clobbers toks

[Adam Fenn]

In an attempt to debug one of my macros I realised that the problem lay in the contents of 
\toks0 and \toks2 goinig AWOL. The example below demonstrates the problem as it only works 
if \enablehyperlinks is not used. Once it is enabled \toks0 and \toks2 go missing. Is this behaviour 
expected? Moving \definexref to the beginning also solves the problem, as does using \newtoks,
but I'm curious as to what the problem actually is. 

Thanks for your trouble,
Adam Fenn.

\def\mymacro#1#2#3#4#5#6#7#8#9{%
#1 #2 #3 #4 #5 #6 #7 #8 #9

\toks0={#1 #2 }%
\toks2={#3 #4 }%
\toks4={#5 #6 }%
\toks6={#7 #8 }%
\toks8={#9 }%

\toks1={#1 #2 }%
\toks3={#3 #4 }%
\toks5={#5 #6 }%
\toks7={#7 #8 }%
\toks9={#9 }%

\definexref{#1}{[marker]}{}%

\the\toks0
\the\toks2
\the\toks4
\the\toks6
\the\toks8

\the\toks1
\the\toks3
\the\toks5
\the\toks7
\the\toks9
}

\mymacro
{One}
{Two}
{Three}
{Four}
{Five}
{Six}
{Seven}
{Eight}
{Nine}

\bye


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