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  1. JDK
  2. JDK-8073846

Javascript for-in loop returned extra keys

    Details

    • Subcomponent:
    • Resolved In Build:
      b62
    • CPU:
      x86_64
    • OS:
      windows_7
    • Verification:
      Not verified

      Backports

        Description

        FULL PRODUCT VERSION :
        java version "1.8.0_31"
        Java(TM) SE Runtime Environment (build 1.8.0_31-b13)
        Java HotSpot(TM) 64-Bit Server VM (build 25.31-b07, mixed mode)

        ADDITIONAL OS VERSION INFORMATION :
        Microsoft Windows [Version 6.1.7601]
        Linux gbl05159 2.6.32-220.23.1.el6.x86_64 #1 SMP Tue Jun 12 11:20:15 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux


        A DESCRIPTION OF THE PROBLEM :
        Dynamically inserted numberic key and values into an initially empty javascript object. Afterwards, a for-in loop is used to enumerate the object key / values. During iteration, however, extra keys are returned that appear to be generated incorrectly by the engine.

        e.g., inserted keys 300,100,500,200. The for-in loop returns 300, 100, 101, 102, ... [snip]... ,199,200, 500 instead of just the 4 keys added.


        REGRESSION. Last worked in version 7u65

        ADDITIONAL REGRESSION INFORMATION:
        java version "1.7.0_60"
        Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
        Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)


        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        1. cd to %JAVA_HOME%/bin
        2. jrunscript -f "for-in loop issue.js"


        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        The last line shows entry count 457
        None of the output values should be null
        ACTUAL -
        The last line showed entry count 9929
        Some of the output values are null because the extra keys were not inserted programmatically.

        REPRODUCIBILITY :
        This bug can be reproduced always.

        ---------- BEGIN SOURCE ----------
        var orders = {}

        var seqs = [
        '2126951',
        '2126950',
        '2128605',
        '2128611',
        '2128610',
        '2122950',
        '2122951',
        '2129807',
        '2129808',
        '2128300',
        '2128305',
        '2128290',
        '2128298',
        '2128291',
        '2128292',
        '2127802',
        '2127687',
        '2127700',
        '2127790',
        '2128282',
        '2128283',
        '2016488',
        '2107211',
        '2126387',
        '2126386',
        '2126999',
        '2126761',
        '2124361',
        '2127942',
        '2126766',
        '2128173',
        '2128194',
        '2128171',
        '2128188',
        '2128187',
        '2128318',
        '2128320',
        '2128321',
        '2128322',
        '2128323',
        '2127200',
        '2127203',
        '2127212',
        '2127231',
        '2127236',
        '2128122',
        '2128120',
        '2128119',
        '2127242',
        '2126956',
        '2126962',
        '2126964',
        '2127786',
        '2127794',
        '2127784',
        '2126968',
        '2120388',
        '2120389',
        '2120390',
        '2126910',
        '2124835',
        '2126744',
        '2124626',
        '2126201',
        '2129086',
        '2129079',
        '2129077',
        '2129078',
        '2129080',
        '2126976',
        '2128633',
        '1881312',
        '2126978',
        '2126982',
        '2126987',
        '2126988',
        '2126989',
        '2126991',
        '2126992',
        '649387',
        '649386',
        '649385',
        '1757783',
        '1757782',
        '1757781',
        '1757780',
        '1757779',
        '1693320',
        '2127506',
        '1757778',
        '1757777',
        '1757776',
        '1757775',
        '1757774',
        '1757773',
        '1757772',
        '1757771',
        '1757770',
        '1757769',
        '2100263',
        '1757768',
        '1757767',
        '1757766',
        '1757765',
        '2105398',
        '2126911',
        '2122135',
        '2124115',
        '2126751',
        '2126752',
        '2124116',
        '2126753',
        '2126912',
        '2126754',
        '2077871',
        '2122433',
        '2039112',
        '2027671',
        '2127535',
        '2025921',
        '1825251',
        '2127541',
        '1790830',
        '2037340',
        '2128661',
        '1381769',
        '1373224',
        '2118842',
        '1727516',
        '2020758',
        '2126407',
        '667195',
        '932000',
        '740104',
        '1202590',
        '1408076',
        '1408075',
        '1656470',
        '2127549',
        '2127550',
        '2127552',
        '2127553',
        '2127554',
        '2127555',
        '2127556',
        '2127557',
        '2127558',
        '2127559',
        '2127560',
        '2127562',
        '2127563',
        '2127564',
        '2127565',
        '2127566',
        '1702638',
        '2127567',
        '2127568',
        '2127569',
        '2127570',
        '2127572',
        '2127573',
        '2127574',
        '1672881',
        '2127577',
        '2127576',
        '2127578',
        '2127579',
        '2127580',
        '2127582',
        '2127581',
        '1920874',
        '2127584',
        '2127583',
        '2127585',
        '2127587',
        '2127586',
        '2127588',
        '1900257',
        '2127591',
        '2127589',
        '2127590',
        '1680074',
        '2127592',
        '2127595',
        '2039146',
        '2127593',
        '2127594',
        '2127596',
        '2127598',
        '2127597',
        '2127599',
        '2127600',
        '2127602',
        '1955223',
        '2127601',
        '2127603',
        '2127604',
        '2127605',
        '2127606',
        '2127608',
        '2127607',
        '2048963',
        '2127609',
        '2127610',
        '2127612',
        '2054914',
        '1900265',
        '2127611',
        '2020830',
        '2025891',
        '2043873',
        '2127614',
        '2127615',
        '2127616',
        '2047380',
        '2043872',
        '2098455',
        '2127617',
        '2127618',
        '2127619',
        '2127620',
        '1997401',
        '2043939',
        '2098454',
        '2127621',
        '2047379',
        '2098453',
        '2047376',
        '2127622',
        '2127623',
        '2048945',
        '2100207',
        '2102080',
        '2127624',
        '2118675',
        '2127625',
        '2084859',
        '2084860',
        '2127626',
        '2127627',
        '2095035',
        '2095034',
        '2118674',
        '2105443',
        '2116668',
        '2118673',
        '2127628',
        '2105434',
        '2105435',
        '2107236',
        '2118672',
        '2127630',
        '2116598',
        '2103787',
        '2103674',
        '2083334',
        '2111424',
        '2112426',
        '2103791',
        '2116516',
        '2120409',
        '2112548',
        '2114628',
        '2114807',
        '2110603',
        '2110602',
        '2114627',
        '2109419',
        '2109418',
        '2114400',
        '2114399',
        '2125914',
        '2120507',
        '2126419',
        '2124183',
        '2124421',
        '2126420',
        '2122287',
        '2122288',
        '2124185',
        '2127642',
        '2127640',
        '2127641',
        '2126421',
        '2124238',
        '2124181',
        '2126417',
        '2127783',
        '2126510',
        '2126199',
        '2127644',
        '2121136',
        '2126368',
        '2126369',
        '2126783',
        '2126382',
        '2126287',
        '2126514',
        '2127648',
        '2127650',
        '2116597',
        '2126109',
        '2126628',
        '2127658',
        '2126010',
        '2126052',
        '2127660',
        '2127661',
        '2127662',
        '2119089',
        '2127664',
        '2125899',
        '1910126',
        '2107209',
        '2107210',
        '2126051',
        '2124878',
        '2126053',
        '1789645',
        '2127676',
        '1561829',
        '2123998',
        '2126416',
        '1819869',
        '2127678',
        '1790815',
        '2124879',
        '2127679',
        '2127681',
        '1750135',
        '2122284',
        '1807721',
        '2127683',
        '2127684',
        '2127686',
        '1850390',
        '1970186',
        '1767772',
        '1535806',
        '2127696',
        '2127697',
        '2126283',
        '2127701',
        '2127712',
        '2127713',
        '2127729',
        '2129817',
        '2127788',
        '2127798',
        '2127801',
        '2126718',
        '2126974',
        '2128575',
        '2128576',
        '1328310',
        '2129813',
        '2129811',
        '2129815',
        '2127127',
        '1867570',
        '2127156',
        '2127157',
        '1867569',
        '2127172',
        '1957543',
        '1957544',
        '1957545',
        '1957546',
        '2127196',
        '2127198',
        '1542539',
        '1674915',
        '2126027',
        '2126028',
        '2127256',
        '2127063',
        '2122856',
        '2122857',
        '1787052',
        '2127328',
        '2127330',
        '1935894',
        '2127793',
        '2118736',
        '2128714',
        '2128713',
        '2127804',
        '2126058',
        '2129725',
        '2129723',
        '2129724',
        '2126884',
        '2127803',
        '2118728',
        '2107204',
        '2127800',
        '2110768',
        '1900263',
        '1481565',
        '1361706',
        '1668420',
        '1894388',
        '2126768',
        '2122818',
        '2129729',
        '2129728',
        '2129730',
        '2102375',
        '2037963',
        '1414970',
        '2127426',
        '2127432',
        '1926640',
        '1961274',
        '2112802',
        '2100463',
        '2114944',
        '2114945',
        '2124119',
        '2105979',
        '2122734',
        '2122735',
        '2114942',
        '2114943',
        '2114559',
        '2115452',
        '2126812',
        '2124351',
        '2126064',
        '2100904',
        '2126816',
        '2127479',
        '2126791',
        '1181223',
        '2126682',
        '2126808',
        '1926628',
        '1926629',
        '429972',
        '2124343',
        '1877405',
        '2126804',
        '1926630',
        '1581491',
        '1164064',
        '2126799',
        '2028000',
        '2106244',
        '1926634',
        '1926633',
        '1926636',
        '1926635',
        '2100826',
        '2126806',
        '2056761',
        '439445',
        '1926638'
        ]

        for (var i = 0; i < seqs.length; i++) {
            orders[seqs[i]] = 'order' + seqs[i]
        }

        var count = 0;
        for (var a in orders) {
            count++;
            println(a + " -> " + orders[a]);
        }
        println('entry count: ' + count);

        ---------- END SOURCE ----------

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                • Assignee:
                  hannesw Hannes Wallnoefer
                  Reporter:
                  webbuggrp Webbug Group
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                  • Created:
                    Updated:
                    Resolved: