text: // This file was procedurally generated from the following sources:
  // - src/dstr-binding/ary-init-iter-close.case
  // - src/dstr-binding/default/func-decl.template
  /*---
  description: Iterator is closed when not exhausted by pattern evaluation (function declaration)
  esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject
  es6id: 14.1.19
  features: [Symbol.iterator, destructuring-binding]
  flags: [generated]
  info: |
      FunctionDeclaration :
          function BindingIdentifier ( FormalParameters ) { FunctionBody }
  
          [...]
          3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody,
             scope, strict).
          [...]
  
      9.2.1 [[Call]] ( thisArgument, argumentsList)
  
      [...]
      7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
      [...]
  
      9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
  
      1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
      [...]
  
      9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
  
      [...]
      23. Let iteratorRecord be Record {[[iterator]]:
          CreateListIterator(argumentsList), [[done]]: false}.
      24. If hasDuplicates is true, then
          [...]
      25. Else,
          b. Let formalStatus be IteratorBindingInitialization for formals with
             iteratorRecord and env as arguments.
      [...]
  
      13.3.3.5 Runtime Semantics: BindingInitialization
  
      BindingPattern : ArrayBindingPattern
  
      [...]
      4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
         result).
      [...]
  
  ---*/
  var doneCallCount = 0;
  var iter = {};
  iter[Symbol.iterator] = function() {
    return {
      next: function() {
        return { value: null, done: false };
      },
      return: function() {
        doneCallCount += 1;
        return {};
      }
    };
  };
  
  var callCount = 0;
  function f([x]) {
    assert.sameValue(doneCallCount, 1);
    callCount = callCount + 1;
  };
  f(iter);
  assert.sameValue(callCount, 1, 'function invoked exactly once');
  