Labeled parameter values clobbering in-order values should produce a warning

[lnihlen]

(
var f = { |a = 2, b = 5, c = 7| "a: % b: % c: %".format(a, b, c).postln; };
f.value(3, 4, 5, a: 1, b: 2, c: 3); // posts a: 1 b: 2 c: 3
)

The labeled parameter values in the call to f clobber the in-order values of the same. Whether this is the best choice for the language or no is a separate discussion. But I think a warning to the programmer might help prevent some subtle bugs.