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2063 :: internal error: how to debug?

• shaunc (orginal) [2016-02-24T00:06:18+01:00] view original

  I am getting the following error:

  /Volumes/Macintosh_HD/Users/shauncutts/src/cucumber_nim/cucumber/runner.nim(65, 8) Error: internal error: inconsistent environment type

  Unfortunately, the code that gives me this is fairly complex, and my attempts at isolating a test case all have made the error disappear. The code is (with partial definitions):

  type
    OrdResult* = tuple[iscenario: int, sresult: ScenarioResult]
    ResultsIter* = iterator(): OrdResult {.closure.}
  
  proc runner*(features: Features) : ResultsIter =
    iterator iresults() : OrdResult {.closure.} =
      var i = 0;
      for feature in features:
        resetContext(ctFeature)
        for scenario in feature.scenarios:
          if scenario.examples.len == 0:
            yield (i, runScenario(scenario))
            i += 1
          else:
            for escenario in exampleScenarios(scenario):
              yield (i, runScenario(escenario))
              i += 1
    return iresults
  Run

  My first thought was that I wasn't allowed to pass an iterator from a closure (which referenced an object from surrounding closure)... but a simple test of this worked. I though someone with more experience could point out the most probable cause?

  EDIT: ok ... I've made the problem go away. It turns out "exampleScenarios" was a default (inline) iterator which however declared a local function (not declared inline) that used values from its scope. When I (manually) inlined that function the error went away. So probably a compiler bug in here but trying to recreate with a sensible test case still didn't work. To find this bug you just have to lure more coders used to writing javascript, and I'm sure it will pop right out. :)

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