k() in cs7 not working as in cs6

[joachimheintz]

for sending a constant value, say 1, to a k-channel in csound 6, i had to use k(1).
this is not any more working in cs7 develop (--Csound version 7.0 (double samples) Mar 9 2023, [commit: 2503fc0]).

the csd below returns this error:

error: error: opcode 'k' for expression with arg types cS not found, line 14
from file test.csd (1)
error: Unable to find opcode entry for 'chnset' with matching argument types:
Found:
(null) chnset @
Candidates:
chnset.i iS
chnset.k kS
chnset.a aS
chnset.S SS

in my opinion, it would be good to have both possibilities as legal, either
chnset 1, "bla"
or
chnset k(1), "bla"

<CsoundSynthesizer>
<CsOptions>
-o dac
</CsOptions>
<CsInstruments>
sr = 44100
ksmps = 64
nchnls = 2
0dbfs = 1

chn_k "bla",2

instr 1
 chnset k(1), "bla"
endin

</CsInstruments>
<CsScore>
i 1 0 1
</CsScore>
</CsoundSynthesizer>

[vlazzarini]

This seems to be a bug in the parser,

error: error: opcode 'k' for expression with arg types cS not found, line 14

this indicates that the parser is reading both 1 and "bla" as arguments to k.

I tested with a1 oscil k(1), 100 and that did not give trouble.