Hello again,
...
$ gsi test.scm >x1 2>x2 "line2" *** ERROR IN "test.scm"@3.1 -- This object was raised: "error" $
Seems the option "-:d-" helps me:
$ gsi -:d- test.scm >x1 2>x2 $ cat x1 line1 "line2" *** ERROR IN "test.scm"@3.1 -- This object was raised: "error" $ cat x2 $