match() separation-grouping bug

[xmb]

Morning,

theres a bug in match() when trying to ()|() match stuff... it matches it 
but only copies the first grouped match to the array: 

echo -e "a\nb\nc" | gawk '{ print match($0, /(a)|(b)|(c)/, S); if (S[1]) 
print S[1] }' 

has been tested on v3.1 to the patched v3.1.2. 

/xmb
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