[dev-context] error in setuplist[alternative=command]

[luigi scarso]

\def\ChapterCommand#1#2#3{#1 #2 #3}%
\setuplist[chapter]
        [alternative=command,
       command=\ChapterCommand]
\starttext
\placecontent
\startpart[title=aaa]
\startchapter[title=bbb]
\startsection[title=ccc]
\input knuth
\stopsection
\stopchapter
\stoppart
\stoptext

! Argument of \ChapterCommand has an extra }.

Perhaps

*** strc-lst.mkvi.new    2012-01-26 16:47:46.000000000 +0100
--- strc-lst.mkvi    2012-01-23 19:44:00.000000000 +0100
***************
*** 755,757 ****
  \startsetups[\??listrenderings:\v!command]
!     \def\p_command{\listalternativeparameter\c!command}%
      \ifx\p_command\empty
--- 755,757 ----
  \startsetups[\??listrenderings:\v!command]
!     \edef\p_command{\listalternativeparameter\c!command}%
      \ifx\p_command\empty

-- 
luigi
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