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<< name1 = name1-value
<< name2 =
<<
<< ${name1?name 1 defined, |$name1|$name2|}
stat=2 result=name 1 defined, |name1-value||
<< ${name1:name 1 undefined, |$name1|$name2|}
stat=0 result=
<< ${name2?name 2 defined, |$name1|$name2|}
stat=0 result=
<< ${name2:name 2 undefined, |$name1|$name2|}
stat=2 result=name 2 undefined, |name1-value||
<< |$name1|$name2|
stat=2 result=|name1-value||
<< $(name1
unknown: warning: truncated macro reference: "$(name1"
stat=1 result=
<< $(name )
unknown: warning: macro name syntax error: "name "
stat=1 result=
<<
<< name2 = name2-value
<<
<< ${name1?name 1 defined, |$name1|$name2|}
stat=0 result=
<< ${name1:name 1 undefined, |$name1|$name2|}
stat=2 result=name 1 undefined, ||name2-value|
<< ${name2?name 2 defined, |$name1|$name2|}
stat=2 result=name 2 defined, ||name2-value|
<< ${name2:name 2 undefined, |$name1|$name2|}
stat=0 result=
<< |$name1|$name2|
stat=2 result=||name2-value|
|