[bug-gawk] problem on Using getline from a Coprocess

[夏凯]

i want to try "Using getline from a Coprocess" but i got a error,
21:37:43#tp#~> cat a.awk
#!/usr/bin/awk
{print $0 | "base64"
}
21:37:47#tp#~> cat b.awk
#!/usr/bin/awk
{print $0 |& "base64"
"base64"|&getline a
print a}
21:37:51#tp#~> echo abc|awk -f a.awk
YWJjCg==
21:37:55#tp#~> awk --version|head -n2
GNU Awk 3.1.6
Copyright (C) 1989, 1991-2007 Free Software Foundation.
21:38:07#tp#~> echo abc|awk -f b.awk
^C       #here it won't stop, so i have to use CTRL+C to stop it.
21:38:16#tp#~>
any help is appreciated.
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