rec {
a =2;
b = 3;
c = builtins.map ( x : x.y ) a b; # line 4
}
default error message: (you have no clue where to spot this error)
|| error: value is an integer while a list was expected
my alternative message:
|| error: while evaluating the primop function, call defined at
`/tmp/test.nix', line 4:
|| value is an integer while a list was expected, value of wrang arg is `2'
And
c = builtins.map ( x : x ) [] b;
is to be read as
c = builtins.map ( x : x ) ([] b);
, correct?
because the error message looks like.
|| attempt to call something which is neither a function nor a primop (built-in
operation) but a list, at `/tmp/test.nix', line 4
Strange, putting a function there still results in an error:
c = builtins.map ( x : x ) ( x : x ) [];
Marc
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