Can't initialize triangle const array

[def-]

proc initCombinations: array[11, array[11, int]] =
  result[0]          = [0,0,0,0,0,0,0,0,0,0,0]
  result[1][1 .. 10] =   [0,0,0,0,0,0,0,0,0,0]
  result[2][2 .. 10] =     [0,0,0,0,0,0,0,0,0]
  result[3][3 .. 10] =       [0,0,0,0,0,0,0,0]
  result[4][4 .. 10] =         [0,0,0,0,0,0,0]
  result[5][5 .. 10] =           [0,0,0,0,0,0]
  result[6][6 .. 10] =             [0,0,0,0,0]

const combinations = initCombinations()

If you comment out any of the assignments in initCombinations it compiles. But now the compiler segfaults:

Traceback (most recent call last)
nim.nim(91)              nim
nim.nim(55)              handleCmdLine
main.nim(273)            mainCommand
main.nim(73)             commandCompileToC
modules.nim(204)         compileProject
modules.nim(152)         compileModule
passes.nim(193)          processModule
passes.nim(137)          processTopLevelStmt
sem.nim(415)             myProcess
sem.nim(389)             semStmtAndGenerateGenerics
semstmts.nim(1305)       semStmt
semexprs.nim(856)        semExprNoType
semexprs.nim(2138)       semExpr
semstmts.nim(443)        semConst
sem.nim(254)             semConstExpr
vm.nim(1409)             evalConstExpr
vm.nim(1406)             evalConstExprAux
vm.nim(468)              rawExecute
ast.nim(969)             len
SIGSEGV: Illegal storage access. (Attempt to read from nil?)
FAILURE