Matching example at top of docs fails to compile

import fusion/matching
{.experimental: "caseStmtMacros".}

case [(1, 3), (3, 4)]:
  of [(1, @a), _]:
    echo a

  else:
    echo "Match failed"

Results in:

benjaminlee@Benjamins-Mac-mini ~ [1]> nim c  tmatching.nim
Hint: used config file '/opt/homebrew/Cellar/nim/1.6.0/nim/config/nim.cfg' [Conf]
Hint: used config file '/opt/homebrew/Cellar/nim/1.6.0/nim/config/config.nims' [Conf]
.................................................................................
stack trace: (most recent call last)
/Users/benjaminlee/.nimble/pkgs/fusion-1.0/fusion/matching.nim(2346, 49) case
/Users/benjaminlee/.nimble/pkgs/fusion-1.0/fusion/matching.nim(2307, 12) matchImpl
/Users/benjaminlee/.nimble/pkgs/fusion-1.0/fusion/matching.nim(1189, 44) parseMatchExpr
/Users/benjaminlee/.nimble/pkgs/fusion-1.0/fusion/matching.nim(1006, 31) parseSeqMatch
/Users/benjaminlee/.nimble/pkgs/fusion-1.0/fusion/matching.nim(1360, 12) parseMatchExpr
/Users/benjaminlee/tmatching.nim(4, 1) template/generic instantiation of `case` from here
/Users/benjaminlee/tmatching.nim(5, 7) Error: Malformed DSL - found (1, @a) of kind nnkTupleConstr.

Nim info:

benjaminlee@Benjamins-Mac-mini ~ [1]> nim -V
Nim Compiler Version 1.6.0 [MacOSX: arm64]
Compiled at 2021-10-19
Copyright (c) 2006-2021 by Andreas Rumpf

active boot switches: -d:release -d:nimUseLinenoise

nim-lang / fusion

Matching example at top of docs fails to compile #99