Demonstrates a JRuby parsing bug with long lines

jruby_long_line_parse.rb

list = [{"string0"=>"value0"}, {"string1"=>"value1"}, {"string2"=>"value2"}, {"string3"=>"value3"}, {"string4"=>"value4"}, {"string5"=>"value5"}, {"string6"=>"value6"}, {"string7"=>"value7"}, {"string8"=>"value8"}, {"string9"=>"value9"}, {"string10"=>"value10"}, {"string11"=>"value11"}, {"string12"=>"value12"}, {"string13"=>"value13"}, {"string14"=>"value14"}, {"string15"=>"value15"}, {"string16"=>"value16"}, {"string17"=>"value17"}, {"string18"=>"value18"}, {"string19"=>"value19"}, {"string20"=>"value20"}, {"string21"=>"value21"}, {"string22"=>"value22"}, {"string23"=>"value23"}, {"string24"=>"value24"}, {"string25"=>"value25"}, {"string26"=>"value26"}, {"string27"=>"value27"}, {"string28"=>"value28"}, {"string29"=>"value29"}, {"string30"=>"value30"}, {"string31"=>"value31"}, {"string32"=>"value32"}, {"string33"=>"value33"}, {"string34"=>"value34"}, {"string35"=>"value35"}, {"string36"=>"value36"}, {"string37"=>"value37"}, {"string38"=>"value38"}, {"string39"=>"value39"}, {"string40"=>"value40"}, {"string41"=>"value41"}, {"string42"=>"value42"}, {"string43"=>"value43"}, {"string44"=>"value44"}, {"string45"=>"value45"}, {"string46"=>"value46"}, {"string47"=>"value47"}, {"string48"=>"value48"}, {"string49"=>"value49"}, {"string50"=>"value50"}, {"string51"=>"value51"}, {"string52"=>"value52"}, {"string53"=>"value53"}, {"string54"=>"value54"}, {"string55"=>"value55"}, {"string56"=>"value56"}, {"string57"=>"value57"}, {"string58"=>"value58"}, {"string59"=>"value59"}, {"string60"=>"value60"}, {"string61"=>"value61"}, {"string62"=>"value62"}, {"string63"=>"value63"}, {"string64"=>"value64"}, {"string65"=>"value65"}, {"string66"=>"value66"}, {"string67"=>"value67"}, {"string68"=>"value68"}, {"string69"=>"value69"}, {"string70"=>"value70"}, {"string71"=>"value71"}, {"string72"=>"value72"}, {"string73"=>"value73"}, {"string74"=>"value74"}, {"string75"=>"value75"}, {"string76"=>"value76"}, {"string77"=>"value77"}, {"string78"=>"value78"}, {"string79"=>"value79"}, {"string80"=>"value80"}, {"string81"=>"value81"}, {"string82"=>"value82"}, {"string83"=>"value83"}, {"string84"=>"value84"}, {"string85"=>"value85"}, {"string86"=>"value86"}, {"string87"=>"value87"}, {"string88"=>"value88"}, {"string89"=>"value89"}, {"string90"=>"value90"}, {"string91"=>"value91"}, {"string92"=>"value92"}, {"string93"=>"value93"}, {"string94"=>"value94"}, {"string95"=>"value95"}, {"string96"=>"value96"}, {"string97"=>"value97"}, {"string98"=>"value98"}, {"string99"=>"value99"}, {"string100"=>"value100"}, {"string101"=>"value101"}, {"string102"=>"value102"}, {"string103"=>"value103"}, {"string104"=>"value104"}, {"string105"=>"value105"}, {"string106"=>"value106"}, {"string107"=>"value107"}, {"string108"=>"value108"}, {"string109"=>"value109"}, {"string110"=>"value110"}, {"string111"=>"value111"}, {"string112"=>"value112"}, {"string113"=>"value113"}, {"string114"=>"value114"}, {"string115"=>"value115"}, {"string116"=>"value116"}, {"string117"=>"value117"}, {"string118"=>"value118"}, {"string119"=>"value119"}, {"string120"=>"value120"}, {"string121"=>"value121"}, {"string122"=>"value122"}, {"string123"=>"value123"}, {"string124"=>"value124"}, {"string125"=>"value125"}, {"string126"=>"value126"}, {"string127"=>"value127"}, {"string128"=>"value128"}, {"string129"=>"value129"}, {"string130"=>"value130"}, {"string131"=>"value131"}, {"string132"=>"value132"}, {"string133"=>"value133"}, {"string134"=>"value134"}, {"string135"=>"value135"}, {"string136"=>"value136"}, {"string137"=>"value137"}, {"string138"=>"value138"}, {"string139"=>"value139"}, {"string140"=>"value140"}, {"string141"=>"value141"}, {"string142"=>"value142"}, {"string143"=>"value143"}, {"string144"=>"value144"}, {"string145"=>"value145"}, {"string146"=>"value146"}, {"string147"=>"value147"}, {"string148"=>"value148"}, {"string149"=>"value149"}, {"string150"=>"value150"}, {"string151"=>"value151"}, {"string152"=>"value152"}, {"string153"=>"value153"}, {"string154"=>"value154"}, {"string155"=>"value155"}, {"string156"=>"value156"}, {"string157"=>"value157"}, {"string158"=>"value158"}, {"string159"=>"value159"}, {"string160"=>"value160"}, {"string161"=>"value161"}, {"string162"=>"value162"}, {"string163"=>"value163"}, {"string164"=>"value164"}, {"string165"=>"value165"}, {"string166"=>"value166"}, {"string167"=>"value167"}, {"string168"=>"value168"}, {"string169"=>"value169"}, {"string170"=>"value170"}, {"string171"=>"value171"}, {"string172"=>"value172"}, {"string173"=>"value173"}, {"string174"=>"value174"}, {"string175"=>"value175"}, {"string176"=>"value176"}, {"string177"=>"value177"}, {"string178"=>"value178"}, {"string179"=>"value179"}, {"string180"=>"value180"}, {"string181"=>"value181"}, {"string182"=>"value182"}, {"string183"=>"value183"}, {"string184"=>"value184"}, {"string185"=>"value185"}, {"string186"=>"value186"}, {"string187"=>"value187"}, {"string188"=>"value188"}, {"string189"=>"value189"}, {"string190"=>"value190"}, {"string191"=>"value191"}, {"string192"=>"value192"}, {"string193"=>"value193"}, {"string194"=>"value194"}, {"string195"=>"value195"}, {"string196"=>"value196"}, {"string197"=>"value197"}, {"string198"=>"value198"}, {"string199"=>"value199"}, {"string200"=>"value200"}, {"string201"=>"value201"}, {"string202"=>"value202"}, {"string203"=>"value203"}, {"string204"=>"value204"}, {"string205"=>"value205"}, {"string206"=>"value206"}, {"string207"=>"value207"}, {"string208"=>"value208"}, {"string209"=>"value209"}, {"string210"=>"value210"}, {"string211"=>"value211"}, {"string212"=>"value212"}, {"string213"=>"value213"}, {"string214"=>"value214"}, {"string215"=>"value215"}, {"string216"=>"value216"}, {"string217"=>"value217"}, {"string218"=>"value218"}, {"string219"=>"value219"}, {"string220"=>"value220"}, {"string221"=>"value221"}, {"string222"=>"value222"}, {"string223"=>"value223"}, {"string224"=>"value224"}, {"string225"=>"value225"}, {"string226"=>"value226"}, {"string227"=>"value227"}, {"string228"=>"value228"}, {"string229"=>"value229"}, {"string230"=>"value230"}, {"string231"=>"value231"}, {"string232"=>"value232"}, {"string233"=>"value233"}, {"string234"=>"value234"}, {"string235"=>"value235"}, {"string236"=>"value236"}, {"string237"=>"value237"}, {"string238"=>"value238"}, {"string239"=>"value239"}, {"string240"=>"value240"}, {"string241"=>"value241"}, {"string242"=>"value242"}, {"string243"=>"value243"}, {"string244"=>"value244"}, {"string245"=>"value245"}, {"string246"=>"value246"}, {"string247"=>"value247"}, {"string248"=>"value248"}, {"string249"=>"value249"}, {"string250"=>"value250"}, {"string251"=>"value251"}, {"string252"=>"value252"}, {"string253"=>"value253"}, {"string254"=>"value254"}, {"string255"=>"value255"}, {"string256"=>"value256"}, {"string257"=>"value257"}, {"string258"=>"value258"}, {"string259"=>"value259"}, {"string260"=>"value260"}, {"string261"=>"value261"}, {"string262"=>"value262"}, {"string263"=>"value263"}, {"string264"=>"value264"}, {"string265"=>"value265"}, {"string266"=>"value266"}, {"string267"=>"value267"}, {"string268"=>"value268"}, {"string269"=>"value269"}, {"string270"=>"value270"}, {"string271"=>"value271"}, {"string272"=>"value272"}, {"string273"=>"value273"}, {"string274"=>"value274"}, {"string275"=>"value275"}, {"string276"=>"value276"}, {"string277"=>"value277"}, {"string278"=>"value278"}, {"string279"=>"value279"}, {"string280"=>"value280"}, {"string281"=>"value281"}, {"string282"=>"value282"}, {"string283"=>"value283"}, {"string284"=>"value284"}, {"string285"=>"value285"}, {"string286"=>"value286"}, {"string287"=>"value287"}, {"string288"=>"value288"}, {"string289"=>"value289"}, {"string290"=>"value290"}, {"string291"=>"value291"}, {"string292"=>"value292"}, {"string293"=>"value293"}, {"string294"=>"value294"}, {"string295"=>"value295"}, {"string296"=>"value296"}, {"string297"=>"value297"}, {"string298"=>"value298"}, {"string299"=>"value299"}, {"string300"=>"value300"}, {"string301"=>"value301"}, {"string302"=>"value302"}, {"string303"=>"value303"}, {"string304"=>"value304"}, {"string305"=>"value305"}, {"string306"=>"value306"}, {"string307"=>"value307"}, {"string308"=>"value308"}, {"string309"=>"value309"}, {"string310"=>"value310"}, {"string311"=>"value311"}]
# Removing this comment causes nothing to be printed.  some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous 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some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment some enormous comment
puts list.size

Save this file then run "jruby jruby_long_line_parse.rb". It will fail with "NameError: undefined local variable or method `comment' for main:Object". Increasing the length of the first line or changing the comment changes the error. I've seen SyntaxError: Illegal octal digit and "SyntaxError: jruby_long_line_parse.rb:1: syntax error, unexpected tSTRING_BEG" depending on the actual length. If I use MRI I don't get any of those errors.