UTF8 encoding issues after passing through Cypress https-proxy: Invalid regular expression

[jdcumpson]

Current behavior:

/[A-Za-zªµºÀ-ÖØ-öø-ƺƻƼ-ƿǀ-ǃDŽ-ʓʔʕ-ʯʰ-ʸʻ-ˁː-ˑˠ-ˤˮͰ-ͳͶ-ͷͺͻ-ͽͿΆΈ-ΊΌΎ-ΡΣ-ϵϷ-ҁ҂Ҋ-ԯԱ-Ֆՙ՚-՟ա-և։ःऄ-हऻऽा-ीॉ-ौॎ-ॏॐक़-ॡ।-॥०-९॰ॱॲ-ঀং-ঃঅ-ঌএ-ঐও-নপ-রলশ-হঽা-ীে-ৈো-ৌৎৗড়-ঢ়য়-ৡ০-৯ৰ-ৱ৴-৹৺ਃਅ-ਊਏ-ਐਓ-ਨਪ-ਰਲ-ਲ਼ਵ-ਸ਼ਸ-ਹਾ-ੀਖ਼-ੜਫ਼੦-੯ੲ-ੴઃઅ-ઍએ-ઑઓ-નપ-રલ-ળવ-હઽા-ીૉો-ૌૐૠ-ૡ૦-૯૰ଂ-ଃଅ-ଌଏ-ଐଓ-ନପ-ରଲ-ଳଵ-ହଽାୀେ-ୈୋ-ୌୗଡ଼-ଢ଼ୟ-ୡ୦-୯୰ୱ୲-୷ஃஅ-ஊஎ-ஐஒ-கங-சஜஞ-டண-தந-பம-ஹா-ிு-ூெ-ைொ-ௌௐௗ௦-௯௰-௲ఁ-ఃఅ-ఌఎ-ఐఒ-నప-హఽు-ౄౘ-ౙౠ-ౡ౦-౯౿ಂ-ಃಅ-ಌಎ-ಐಒ-ನಪ-ಳವ-ಹಽಾಿೀ-ೄೆೇ-ೈೊ-ೋೕ-ೖೞೠ-ೡ೦-೯ೱ-ೲം-ഃഅ-ഌഎ-ഐഒ-ഺഽാ-ീെ-ൈൊ-ൌൎൗൠ-ൡ൦-൯൰-൵൹ൺ-ൿං-ඃඅ-ඖක-නඳ-රලව-ෆා-ෑෘ-ෟ෦-෯ෲ-ෳ෴ก-ะา-ำเ-ๅๆ๏๐-๙๚-๛ກ-ຂຄງ-ຈຊຍດ-ທນ-ຟມ-ຣລວສ-ຫອ-ະາ-ຳຽເ-ໄໆ໐-໙ໜ-ໟༀ༁-༃༄-༒༓༔༕-༗༚-༟༠-༩༪-༳༴༶༸༾-༿ཀ-ཇཉ-ཬཿ྅ྈ-ྌ྾-࿅࿇-࿌࿎-࿏࿐-࿔࿕-࿘࿙-࿚က-ဪါ-ာေးျ-ြဿ၀-၉၊-၏ၐ-ၕၖ-ၗၚ-ၝၡၢ-ၤၥ-ၦၧ-ၭၮ-ၰၵ-ႁႃ-ႄႇ-ႌႎႏ႐-႙ႚ-ႜ႞-႟Ⴀ-ჅჇჍა-ჺ჻ჼჽ-ቈቊ-ቍቐ-ቖቘቚ-ቝበ-ኈኊ-ኍነ-ኰኲ-ኵኸ-ኾዀዂ-ዅወ-ዖዘ-ጐጒ-ጕጘ-ፚ፠-፨፩-፼ᎀ-ᎏᎠ-Ᏼᐁ-ᙬ᙭-᙮ᙯ-ᙿᚁ-ᚚᚠ-ᛪ᛫-᛭ᛮ-ᛰᛱ-ᛸᜀ-ᜌᜎ-ᜑᜠ-ᜱ᜵-᜶ᝀ-ᝑᝠ-ᝬᝮ-ᝰក-ឳាើ-ៅះ-ៈ។-៖ៗ៘-៚ៜ០-៩᠐-᠙ᠠ-ᡂᡃᡄ-ᡷᢀ-ᢨᢪᢰ-ᣵᤀ-ᤞᤣ-ᤦᤩ-ᤫᤰ-ᤱᤳ-ᤸ᥆-᥏ᥐ-ᥭᥰ-ᥴᦀ-ᦫᦰ-ᧀᧁ-ᧇᧈ-ᧉ᧐-᧙᧚ᨀ-ᨖᨙ-ᨚ᨞-᨟ᨠ-ᩔᩕᩗᩡᩣ-ᩤᩭ-ᩲ᪀-᪉᪐-᪙᪠-᪦ᪧ᪨-᪭ᬄᬅ-ᬳᬵᬻᬽ-ᭁᭃ-᭄ᭅ-ᭋ᭐-᭙᭚-᭠᭡-᭪᭴-᭼ᮂᮃ-ᮠᮡᮦ-ᮧ᮪ᮮ-ᮯ᮰-᮹ᮺ-ᯥᯧᯪ-ᯬᯮ᯲-᯳᯼-᯿ᰀ-ᰣᰤ-ᰫᰴ-ᰵ᰻-᰿᱀-᱉ᱍ-ᱏ᱐-᱙ᱚ-ᱷᱸ-ᱽ᱾-᱿᳀-᳇᳓᳡ᳩ-ᳬᳮ-ᳱᳲ-ᳳᳵ-ᳶᴀ-ᴫᴬ-ᵪᵫ-ᵷᵸᵹ-ᶚᶛ-ᶿḀ-ἕἘ-Ἕἠ-ὅὈ-Ὅὐ-ὗὙὛὝὟ-ώᾀ-ᾴᾶ-ᾼιῂ-ῄῆ-ῌῐ-ΐῖ-Ίῠ-Ῥῲ-ῴῶ-ῼ‎ⁱⁿₐ-ₜℂℇℊ-ℓℕℙ-ℝℤΩℨK-ℭℯ-ℴℵ-ℸℹℼ-ℿⅅ-ⅉⅎ⅏Ⅰ-ↂↃ-ↄↅ-ↈ⌶-⍺⎕⒜-ⓩ⚬⠀-⣿Ⰰ-Ⱞⰰ-ⱞⱠ-ⱻⱼ-ⱽⱾ-ⳤⳫ-ⳮⳲ-ⳳⴀ-ⴥⴧⴭⴰ-ⵧⵯ⵰ⶀ-ⶖⶠ-ⶦⶨ-ⶮⶰ-ⶶⶸ-ⶾⷀ-ⷆⷈ-ⷎⷐ-ⷖⷘ-ⷞ々〆〇〡-〩〮-〯〱-〵〸-〺〻〼ぁ-ゖゝ-ゞゟァ-ヺー-ヾヿㄅ-ㄭㄱ-ㆎ㆐-㆑㆒-㆕㆖-㆟ㆠ-ㆺㇰ-ㇿ㈀-㈜㈠-㈩㈪-㉇㉈-㉏㉠-㉻㉿㊀-㊉㊊-㊰㋀-㋋㋐-㋾㌀-㍶㍻-㏝㏠-㏾㐀-䶵一-鿌ꀀ-ꀔꀕꀖ-ꒌꓐ-ꓷꓸ-ꓽ꓾-꓿ꔀ-ꘋꘌꘐ-ꘟ꘠-꘩ꘪ-ꘫꙀ-ꙭꙮꚀ-ꚛꚜ-ꚝꚠ-ꛥꛦ-ꛯ꛲-꛷Ꜣ-ꝯꝰꝱ-ꞇ꞉-꞊Ꞌ-ꞎꞐ-ꞭꞰ-Ʇꟷꟸ-ꟹꟺꟻ-ꠁꠃ-ꠅꠇ-ꠊꠌ-ꠢꠣ-ꠤꠧ꠰-꠵꠶-꠷ꡀ-ꡳꢀ-ꢁꢂ-ꢳꢴ-ꣃ꣎-꣏꣐-꣙ꣲ-ꣷ꣸-꣺ꣻ꤀-꤉ꤊ-ꤥ꤮-꤯ꤰ-ꥆꥒ-꥓꥟ꥠ-ꥼꦃꦄ-ꦲꦴ-ꦵꦺ-ꦻꦽ-꧀꧁-꧍ꧏ꧐-꧙꧞-꧟ꧠ-ꧤꧦꧧ-ꧯ꧰-꧹ꧺ-ꧾꨀ-ꨨꨯ-ꨰꨳ-ꨴꩀ-ꩂꩄ-ꩋꩍ꩐-꩙꩜-꩟ꩠ-ꩯꩰꩱ-ꩶ꩷-꩹ꩺꩻꩽꩾ-ꪯꪱꪵ-ꪶꪹ-ꪽꫀꫂꫛ-ꫜꫝ꫞-꫟ꫠ-ꫪꫫꫮ-ꫯ꫰-꫱ꫲꫳ-ꫴꫵꬁ-ꬆꬉ-ꬎꬑ-ꬖꬠ-ꬦꬨ-ꬮꬰ-ꭚ꭛ꭜ-ꭟꭤ-ꭥꯀ-ꯢꯣ-ꯤꯦ-ꯧꯩ-ꯪ꯫꯬꯰-꯹가-힣ힰ-ퟆퟋ-ퟻ-豈-舘並-龎ff-stﬓ-ﬗＡ-Ｚａ-ｚｦ-ｯｰｱ-ﾝﾞ-ﾟﾠ-ﾾￂ-ￇￊ-ￏￒ-ￗￚ-ￜ֐־׀׃׆׈-׏א-ת׫-ׯװ-ײ׳-״׵-׿߀-߉ߊ-ߪߴ-ߵߺ߻-߿ࠀ-ࠕࠚࠤࠨ࠮-࠯࠰-࠾࠿ࡀ-ࡘ࡜-࡝࡞࡟-࢟‏יִײַ-ﬨשׁ-זּ﬷טּ-לּ﬽מּ﬿נּ-סּ﭂ףּ-פּ﭅צּ-ﭏ؈؋؍؛؜؝؞-؟ؠ-ؿـف-ي٭ٮ-ٯٱ-ۓ۔ەۥ-ۦۮ-ۯۺ-ۼ۽-۾ۿ܀-܍܎܏ܐܒ-ܯ݋-݌ݍ-ޥޱ޲-޿ࢠ-ࢲࢳ-ࣣﭐ-ﮱ﮲-﯁﯂-﯒ﯓ-ﴽ﵀-﵏ﵐ-ﶏ﶐-﶑ﶒ-ﷇ﷈-﷏ﷰ-ﷻ﷼﷾-﷿ﹰ-ﹴ﹵ﹶ-ﻼ﻽-﻾]/

If you compare the strings piecewise you will see that many of the UTF8 characters are different or mangled. I suspect BOMs are not being respected and therefore causing the browser to dislike them as RegExps.

Note: this did not happen locally because I was serving files via HTTP instead. When serving them via HTTPS (locally or remotely) it had this issue.

Desired behavior:

The encoded utf8 string to be valid when files are loaded via cypress https proxy

/[A-Za-zªµºÀ-ÖØ-öø-ƺƻƼ-ƿǀ-ǃDŽ-ʓʔʕ-ʯʰ-ʸʻ-ˁː-ˑˠ-ˤˮͰ-ͳͶ-ͷͺͻ-ͽͿΆΈ-ΊΌΎ-ΡΣ-ϵϷ-ҁ҂Ҋ-ԯԱ-Ֆՙ՚-՟ա-և։ःऄ-हऻऽा-ीॉ-ौॎ-ॏॐक़-ॡ।-॥०-९॰ॱॲ-ঀং-ঃঅ-ঌএ-ঐও-নপ-রলশ-হঽা-ীে-ৈো-ৌৎৗড়-ঢ়য়-ৡ০-৯ৰ-ৱ৴-৹৺ਃਅ-ਊਏ-ਐਓ-ਨਪ-ਰਲ-ਲ਼ਵ-ਸ਼ਸ-ਹਾ-ੀਖ਼-ੜਫ਼੦-੯ੲ-ੴઃઅ-ઍએ-ઑઓ-નપ-રલ-ળવ-હઽા-ીૉો-ૌૐૠ-ૡ૦-૯૰ଂ-ଃଅ-ଌଏ-ଐଓ-ନପ-ରଲ-ଳଵ-ହଽାୀେ-ୈୋ-ୌୗଡ଼-ଢ଼ୟ-ୡ୦-୯୰ୱ୲-୷ஃஅ-ஊஎ-ஐஒ-கங-சஜஞ-டண-தந-பம-ஹா-ிு-ூெ-ைொ-ௌௐௗ௦-௯௰-௲ఁ-ఃఅ-ఌఎ-ఐఒ-నప-హఽు-ౄౘ-ౙౠ-ౡ౦-౯౿ಂ-ಃಅ-ಌಎ-ಐಒ-ನಪ-ಳವ-ಹಽಾಿೀ-ೄೆೇ-ೈೊ-ೋೕ-ೖೞೠ-ೡ೦-೯ೱ-ೲം-ഃഅ-ഌഎ-ഐഒ-ഺഽാ-ീെ-ൈൊ-ൌൎൗൠ-ൡ൦-൯൰-൵൹ൺ-ൿං-ඃඅ-ඖක-නඳ-රලව-ෆා-ෑෘ-ෟ෦-෯ෲ-ෳ෴ก-ะา-ำเ-ๅๆ๏๐-๙๚-๛ກ-ຂຄງ-ຈຊຍດ-ທນ-ຟມ-ຣລວສ-ຫອ-ະາ-ຳຽເ-ໄໆ໐-໙ໜ-ໟༀ༁-༃༄-༒༓༔༕-༗༚-༟༠-༩༪-༳༴༶༸༾-༿ཀ-ཇཉ-ཬཿ྅ྈ-ྌ྾-࿅࿇-࿌࿎-࿏࿐-࿔࿕-࿘࿙-࿚က-ဪါ-ာေးျ-ြဿ၀-၉၊-၏ၐ-ၕၖ-ၗၚ-ၝၡၢ-ၤၥ-ၦၧ-ၭၮ-ၰၵ-ႁႃ-ႄႇ-ႌႎႏ႐-႙ႚ-ႜ႞-႟Ⴀ-ჅჇჍა-ჺ჻ჼჽ-ቈቊ-ቍቐ-ቖቘቚ-ቝበ-ኈኊ-ኍነ-ኰኲ-ኵኸ-ኾዀዂ-ዅወ-ዖዘ-ጐጒ-ጕጘ-ፚ፠-፨፩-፼ᎀ-ᎏᎠ-Ᏼᐁ-ᙬ᙭-᙮ᙯ-ᙿᚁ-ᚚᚠ-ᛪ᛫-᛭ᛮ-ᛰᛱ-ᛸᜀ-ᜌᜎ-ᜑᜠ-ᜱ᜵-᜶ᝀ-ᝑᝠ-ᝬᝮ-ᝰក-ឳាើ-ៅះ-ៈ។-៖ៗ៘-៚ៜ០-៩᠐-᠙ᠠ-ᡂᡃᡄ-ᡷᢀ-ᢨᢪᢰ-ᣵᤀ-ᤞᤣ-ᤦᤩ-ᤫᤰ-ᤱᤳ-ᤸ᥆-᥏ᥐ-ᥭᥰ-ᥴᦀ-ᦫᦰ-ᧀᧁ-ᧇᧈ-ᧉ᧐-᧙᧚ᨀ-ᨖᨙ-ᨚ᨞-᨟ᨠ-ᩔᩕᩗᩡᩣ-ᩤᩭ-ᩲ᪀-᪉᪐-᪙᪠-᪦ᪧ᪨-᪭ᬄᬅ-ᬳᬵᬻᬽ-ᭁᭃ-᭄ᭅ-ᭋ᭐-᭙᭚-᭠᭡-᭪᭴-᭼ᮂᮃ-ᮠᮡᮦ-ᮧ᮪ᮮ-ᮯ᮰-᮹ᮺ-ᯥᯧᯪ-ᯬᯮ᯲-᯳᯼-᯿ᰀ-ᰣᰤ-ᰫᰴ-ᰵ᰻-᰿᱀-᱉ᱍ-ᱏ᱐-᱙ᱚ-ᱷᱸ-ᱽ᱾-᱿᳀-᳇᳓᳡ᳩ-ᳬᳮ-ᳱᳲ-ᳳᳵ-ᳶᴀ-ᴫᴬ-ᵪᵫ-ᵷᵸᵹ-ᶚᶛ-ᶿḀ-ἕἘ-Ἕἠ-ὅὈ-Ὅὐ-ὗὙὛὝὟ-ώᾀ-ᾴᾶ-ᾼιῂ-ῄῆ-ῌῐ-ΐῖ-Ίῠ-Ῥῲ-ῴῶ-ῼ‎ⁱⁿₐ-ₜℂℇℊ-ℓℕℙ-ℝℤΩℨK-ℭℯ-ℴℵ-ℸℹℼ-ℿⅅ-ⅉⅎ⅏Ⅰ-ↂↃ-ↄↅ-ↈ⌶-⍺⎕⒜-ⓩ⚬⠀-⣿Ⰰ-Ⱞⰰ-ⱞⱠ-ⱻⱼ-ⱽⱾ-ⳤⳫ-ⳮⳲ-ⳳⴀ-ⴥⴧⴭⴰ-ⵧⵯ⵰ⶀ-ⶖⶠ-ⶦⶨ-ⶮⶰ-ⶶⶸ-ⶾⷀ-ⷆⷈ-ⷎⷐ-ⷖⷘ-ⷞ々〆〇〡-〩〮-〯〱-〵〸-〺〻〼ぁ-ゖゝ-ゞゟァ-ヺー-ヾヿㄅ-ㄭㄱ-ㆎ㆐-㆑㆒-㆕㆖-㆟ㆠ-ㆺㇰ-ㇿ㈀-㈜㈠-㈩㈪-㉇㉈-㉏㉠-㉻㉿㊀-㊉㊊-㊰㋀-㋋㋐-㋾㌀-㍶㍻-㏝㏠-㏾㐀-䶵一-鿌ꀀ-ꀔꀕꀖ-ꒌꓐ-ꓷꓸ-ꓽ꓾-꓿ꔀ-ꘋꘌꘐ-ꘟ꘠-꘩ꘪ-ꘫꙀ-ꙭꙮꚀ-ꚛꚜ-ꚝꚠ-ꛥꛦ-ꛯ꛲-꛷Ꜣ-ꝯꝰꝱ-ꞇ꞉-꞊Ꞌ-ꞎꞐ-ꞭꞰ-Ʇꟷꟸ-ꟹꟺꟻ-ꠁꠃ-ꠅꠇ-ꠊꠌ-ꠢꠣ-ꠤꠧ꠰-꠵꠶-꠷ꡀ-ꡳꢀ-ꢁꢂ-ꢳꢴ-ꣃ꣎-꣏꣐-꣙ꣲ-ꣷ꣸-꣺ꣻ꤀-꤉ꤊ-ꤥ꤮-꤯ꤰ-ꥆꥒ-꥓꥟ꥠ-ꥼꦃꦄ-ꦲꦴ-ꦵꦺ-ꦻꦽ-꧀꧁-꧍ꧏ꧐-꧙꧞-꧟ꧠ-ꧤꧦꧧ-ꧯ꧰-꧹ꧺ-ꧾꨀ-ꨨꨯ-ꨰꨳ-ꨴꩀ-ꩂꩄ-ꩋꩍ꩐-꩙꩜-꩟ꩠ-ꩯꩰꩱ-ꩶ꩷-꩹ꩺꩻꩽꩾ-ꪯꪱꪵ-ꪶꪹ-ꪽꫀꫂꫛ-ꫜꫝ꫞-꫟ꫠ-ꫪꫫꫮ-ꫯ꫰-꫱ꫲꫳ-ꫴꫵꬁ-ꬆꬉ-ꬎꬑ-ꬖꬠ-ꬦꬨ-ꬮꬰ-ꭚ꭛ꭜ-ꭟꭤ-ꭥꯀ-ꯢꯣ-ꯤꯦ-ꯧꯩ-ꯪ꯫꯬꯰-꯹가-힣ힰ-ퟆퟋ-ퟻ-豈-舘並-龎ff-stﬓ-ﬗＡ-Ｚａ-ｚｦ-ｯｰｱ-ﾝﾞ-ﾟﾠ-ﾾￂ-ￇￊ-ￏￒ-ￗￚ-ￜ֐־׀׃׆׈-׏א-ת׫-ׯװ-ײ׳-״׵-׿߀-߉ߊ-ߪߴ-ߵߺ߻-߿ࠀ-ࠕࠚࠤࠨ࠮-࠯࠰-࠾࠿ࡀ-ࡘ࡜-࡝࡞࡟-࢟‏יִײַ-ﬨשׁ-זּ﬷טּ-לּ﬽מּ﬿נּ-סּ﭂ףּ-פּ﭅צּ-ﭏ؈؋؍؛؜؝؞-؟ؠ-ؿـف-ي٭ٮ-ٯٱ-ۓ۔ەۥ-ۦۮ-ۯۺ-ۼ۽-۾ۿ܀-܍܎܏ܐܒ-ܯ݋-݌ݍ-ޥޱ޲-޿ࢠ-ࢲࢳ-ࣣﭐ-ﮱ﮲-﯁﯂-﯒ﯓ-ﴽ﵀-﵏ﵐ-ﶏ﶐-﶑ﶒ-ﷇ﷈-﷏ﷰ-ﷻ﷼﷾-﷿ﹰ-ﹴ﹵ﹶ-ﻼ﻽-﻾]/

Steps to reproduce:

Use the desired UTF8 string output above in a source file required by cypress over HTTPS.

• Add a source file with the above as a RegExp(<string>) argument
• Serve the source file via HTTPS only
• The loaded page will throw this error upon loading the source file with the RegExp, so long as it is evaluated in the running scope.

Note: This does not happen when serving from HTTP. After several hours of debugging the only thing left we did not try was writing our own proxy. We tried several workarounds including disabling all uglifying and webpack steps as well as ensuring that all the build steps were identical to my local versions if running locally.

Versions

  │ Cypress:    3.0.2                                                                              │
  │ Browser:    Electron 59 (headless)                                                │

Happens on Chrome 67 as well when using the open Cypress command. Running on MacOS High Sierra 10.13.5.

Current workaround

win.RegExp = function(pattern, scope) {
    if (Cypress.env().brokenRegexp === pattern) {
      // Here be dragons.
      // This was necessary because we suspect the reverse https proxy used in Cypress does
      // weird things to UTF8 BOM. It causes a slight diff which makes the RegExp invalid.
      // Ipen
      console.warn('WARN: replacing broken RegExp from uft8 mangling.');
      pattern = Cypress.env().goodRexep;
    }
    return oldRegExp.apply(this, [pattern, scope]);
  };

Where goodRegExp and brokenRegExp have been loaded by a plugin into the environment.

[simondiep]

I'm running into this exact issue, but intermittently. The regular expression seems to come from the draft-js or fbjs dependency. @jdcumpson - Could you post your entire plugins.js file (workaround)? It's not working for me.

Here's what I have so far. The code causing the error doesn't seem to be hitting this code though.

    (function(originalRegExp) {
        window.RegExp = function(pattern, scope) {
          const badRegexpAsString = "[A-Za-zªµºÀ-ÖØ-öø-ƺƻƼ-ƿǀ-ǃDŽ-ʓʔʕ-ʯʰ-ʸʻ-ˁː-ˑˠ-ˤˮͰ-ͳͶ-ͷͺͻ-ͽͿΆΈ-ΊΌΎ-ΡΣ-ϵϷ-ҁ҂Ҋ-ԯԱ-Ֆՙ՚-՟ա-և։ःऄ-हऻऽा-ीॉ-ौॎ-ॏॐक़-ॡ।-॥०-९॰ॱॲ-ঀং-ঃঅ-ঌএ-ঐও-নপ-রলশ-হঽা-ীে-ৈো-ৌৎৗড়-ঢ়য়-ৡ০-৯ৰ-ৱ৴-৹৺ਃਅ-ਊਏ-ਐਓ-ਨਪ-ਰਲ-ਲ਼ਵ-ਸ਼ਸ-ਹਾ-ੀਖ਼-ੜਫ਼੦-੯ੲ-ੴઃઅ-ઍએ-ઑઓ-નપ-રલ-ળવ-હઽા-ીૉો-ૌૐૠ-ૡ૦-૯૰ଂ-ଃଅ-ଌଏ-ଐଓ-ନପ-ରଲ-ଳଵ-ହଽାୀେ-ୈୋ-ୌୗଡ଼-ଢ଼ୟ-ୡ୦-୯୰ୱ୲-୷ஃஅ-ஊஎ-ஐஒ-கங-சஜஞ-டண-த���-பம-ஹா-ிு-ூெ-ைொ-ௌௐௗ௦-௯௰-௲ఁ-ఃఅ-ఌఎ-ఐఒ-నప-హఽు-ౄౘ-ౙౠ-ౡ౦-౯౿ಂ-ಃಅ-ಌಎ-ಐಒ-ನಪ-ಳವ-ಹಽಾಿೀ-ೄೆೇ-ೈೊ-ೋೕ-ೖೞೠ-ೡ೦-೯ೱ-ೲം-ഃഅ-ഌഎ-ഐഒ-ഺഽാ-ീെ-ൈൊ-ൌൎൗൠ-ൡ൦-൯൰-൵൹ൺ-ൿං-ඃඅ-ඖක-නඳ-රලව-ෆා-ෑෘ-ෟ෦-෯ෲ-ෳ෴ก-ะา-ำเ-ๅๆ๏๐-๙๚-๛ກ-ຂຄງ-ຈຊຍດ-ທນ-ຟມ-ຣລວສ-ຫອ-ະາ-ຳຽເ-ໄໆ໐-໙ໜ-ໟༀ༁-༃༄-༒༓༔༕-༗༚-༟༠-༩༪-༳༴༶༸༾-༿ཀ-ཇཉ-ཬཿ྅ྈ-ྌ྾-࿅࿇-࿌࿎-࿏࿐-࿔࿕-࿘࿙-࿚က-ဪါ-ာေးျ-ြဿ၀-၉၊-၏ၐ-ၕၖ-ၗၚ-ၝၡၢ-ၤၥ-ၦၧ-ၭၮ-ၰၵ-ႁႃ-ႄႇ-ႌႎႏ႐-႙ႚ-ႜ႞-႟Ⴀ-ჅჇჍა-ჺ჻ჼჽ-ቈቊ-ቍቐ-ቖቘቚ-ቝበ-ኈኊ-ኍነ-ኰኲ-ኵኸ-ኾዀዂ-ዅወ-ዖዘ-ጐጒ-ጕጘ-ፚ፠-፨፩-፼ᎀ-ᎏᎠ-Ᏼᐁ-ᙬ᙭-᙮ᙯ-ᙿᚁ-ᚚᚠ-ᛪ᛫-᛭ᛮ-ᛰᛱ-ᛸᜀ-ᜌᜎ-ᜑᜠ-ᜱ᜵-᜶ᝀ-ᝑᝠ-ᝬᝮ-ᝰក-ឳាើ-ៅះ-ៈ។-៖ៗ៘-៚ៜ០-៩᠐-᠙ᠠ-ᡂᡃᡄ-ᡷᢀ-ᢨᢪᢰ-ᣵᤀ-ᤞᤣ-ᤦᤩ-ᤫᤰ-ᤱᤳ-ᤸ᥆-᥏ᥐ-ᥭᥰ-ᥴᦀ-ᦫᦰ-ᧀᧁ-ᧇᧈ-ᧉ᧐-᧙᧚ᨀ-ᨖᨙ-ᨚ᨞-᨟ᨠ-ᩔᩕᩗᩡᩣ-ᩤᩭ-ᩲ᪀-᪉᪐-᪙᪠-᪦ᪧ᪨-᪭ᬄᬅ-ᬳᬵᬻᬽ-ᭁᭃ-᭄ᭅ-ᭋ᭐-᭙᭚-᭠᭡-᭪᭴-᭼ᮂᮃ-ᮠᮡᮦ-ᮧ᮪ᮮ-ᮯ᮰-᮹ᮺ-ᯥᯧᯪ-ᯬᯮ᯲-᯳᯼-᯿ᰀ-ᰣᰤ-ᰫᰴ-ᰵ᰻-᰿᱀-᱉ᱍ-ᱏ᱐-᱙ᱚ-ᱷᱸ-ᱽ᱾-᱿᳀-᳇᳓᳡ᳩ-ᳬᳮ-ᳱᳲ-ᳳᳵ-ᳶᴀ-ᴫᴬ-ᵪᵫ-ᵷᵸᵹ-ᶚᶛ-ᶿḀ-ἕἘ-Ἕἠ-ὅὈ-Ὅὐ-ὗὙὛὝὟ-ώᾀ-ᾴᾶ-ᾼιῂ-ῄῆ-ῌῐ-ΐῖ-Ίῠ-Ῥῲ-ῴῶ-ῼ‎ⁱⁿₐ-ₜℂℇℊ-ℓℕℙ-ℝℤΩℨK-ℭℯ-ℴℵ-ℸℹℼ-ℿⅅ-ⅉⅎ⅏Ⅰ-ↂↃ-ↄↅ-ↈ⌶-⍺⎕⒜-ⓩ⚬⠀-⣿Ⰰ-Ⱞⰰ-ⱞⱠ-ⱻⱼ-ⱽⱾ-ⳤⳫ-ⳮⳲ-ⳳⴀ-ⴥⴧⴭⴰ-ⵧⵯ⵰ⶀ-ⶖⶠ-ⶦⶨ-ⶮⶰ-ⶶⶸ-ⶾⷀ-ⷆⷈ-ⷎⷐ-ⷖⷘ-ⷞ々〆〇〡-〩〮-〯〱-〵〸-〺〻〼ぁ-ゖゝ-ゞゟァ-ヺー-ヾヿㄅ-ㄭㄱ-ㆎ㆐-㆑㆒-㆕㆖-㆟ㆠ-ㆺㇰ-ㇿ㈀-㈜㈠-㈩㈪-㉇㉈-㉏㉠-㉻㉿㊀-㊉㊊-㊰㋀-㋋㋐-㋾㌀-㍶㍻-㏝㏠-㏾㐀-䶵一-鿌ꀀ-ꀔꀕꀖ-ꒌꓐ-ꓷꓸ-ꓽ꓾-꓿ꔀ-ꘋꘌꘐ-ꘟ꘠-꘩ꘪ-ꘫꙀ-ꙭꙮꚀ-ꚛꚜ-ꚝꚠ-ꛥꛦ-ꛯ꛲-꛷Ꜣ-ꝯꝰꝱ-ꞇ꞉-꞊Ꞌ-ꞎꞐ-ꞭꞰ-Ʇꟷꟸ-ꟹꟺꟻ-ꠁꠃ-ꠅꠇ-ꠊꠌ-ꠢꠣ-ꠤꠧ꠰-꠵꠶-꠷ꡀ-ꡳꢀ-ꢁꢂ-ꢳꢴ-ꣃ꣎-꣏꣐-꣙ꣲ-ꣷ꣸-꣺ꣻ꤀-꤉ꤊ-ꤥ꤮-꤯ꤰ-ꥆꥒ-꥓꥟ꥠ-ꥼꦃꦄ-ꦲꦴ-ꦵꦺ-ꦻꦽ-꧀꧁-꧍ꧏ꧐-꧙꧞-꧟ꧠ-ꧤꧦꧧ-ꧯ꧰-꧹ꧺ-ꧾꨀ-ꨨꨯ-ꨰꨳ-ꨴꩀ-ꩂꩄ-ꩋꩍ꩐-꩙꩜-꩟ꩠ-ꩯꩰꩱ-ꩶ꩷-꩹ꩺꩻꩽꩾ-ꪯꪱꪵ-ꪶꪹ-ꪽꫀꫂꫛ-ꫜꫝ꫞-꫟ꫠ-ꫪꫫꫮ-ꫯ꫰-꫱ꫲꫳ-ꫴꫵꬁ-ꬆꬉ-ꬎꬑ-ꬖꬠ-ꬦꬨ-ꬮꬰ-ꭚ꭛ꭜ-ꭟꭤ-ꭥꯀ-ꯢꯣ-ꯤꯦ-ꯧꯩ-ꯪ꯫꯬꯰-꯹가-힣ힰ-ퟆퟋ-ퟻ-豈-舘並-龎ff-stﬓ-ﬗＡ-Ｚａ-ｚｦ-ｯｰｱ-ﾝﾞ-ﾟﾠ-ﾾￂ-ￇￊ-ￏￒ-ￗￚ-ￜ֐־׀׃׆׈-׏א-ת׫-ׯװ-ײ׳-״׵-׿߀-߉ߊ-ߪߴ-ߵߺ߻-߿ࠀ-ࠕࠚࠤࠨ࠮-࠯࠰-࠾࠿ࡀ-ࡘ࡜-࡝࡞࡟-࢟‏יִײַ-ﬨשׁ-זּ﬷טּ-לּ﬽מּ﬿נּ-סּ﭂ףּ-פּ﭅צּ-ﭏ؈؋؍؛؜؝؞-؟ؠ-ؿـف-ي٭ٮ-ٯٱ-ۓ۔ەۥ-ۦۮ-ۯۺ-ۼ۽-۾ۿ܀-܍܎܏ܐܒ-ܯ݋-݌ݍ-ޥޱ޲-޿ࢠ-ࢲࢳ-ࣣﭐ-ﮱ﮲-﯁﯂-﯒ﯓ-ﴽ﵀-﵏ﵐ-ﶏ﶐-﶑ﶒ-ﷇ﷈-﷏ﷰ-ﷻ﷼﷾-﷿ﹰ-ﹴ﹵ﹶ-ﻼ﻽-﻾]";
          const goodRegexp = /[A-Za-zªµºÀ-ÖØ-öø-ƺƻƼ-ƿǀ-ǃDŽ-ʓʔʕ-ʯʰ-ʸʻ-ˁː-ˑˠ-ˤˮͰ-ͳͶ-ͷͺͻ-ͽͿΆΈ-ΊΌΎ-ΡΣ-ϵϷ-ҁ҂Ҋ-ԯԱ-Ֆՙ՚-՟ա-և։ःऄ-हऻऽा-ीॉ-ौॎ-ॏॐक़-ॡ।-॥०-९॰ॱॲ-ঀং-ঃঅ-ঌএ-ঐও-নপ-রলশ-হঽা-ীে-ৈো-ৌৎৗড়-ঢ়য়-ৡ০-৯ৰ-ৱ৴-৹৺ਃਅ-ਊਏ-ਐਓ-ਨਪ-ਰਲ-ਲ਼ਵ-ਸ਼ਸ-ਹਾ-ੀਖ਼-ੜਫ਼੦-੯ੲ-ੴઃઅ-ઍએ-ઑઓ-નપ-રલ-ળવ-હઽા-ીૉો-ૌૐૠ-ૡ૦-૯૰ଂ-ଃଅ-ଌଏ-ଐଓ-ନପ-ରଲ-ଳଵ-ହଽାୀେ-ୈୋ-ୌୗଡ଼-ଢ଼ୟ-ୡ୦-୯୰ୱ୲-୷ஃஅ-ஊஎ-ஐஒ-கங-சஜஞ-டண-தந-பம-ஹா-ிு-ூெ-ைொ-ௌௐௗ௦-௯௰-௲ఁ-ఃఅ-ఌఎ-ఐఒ-నప-హఽు-ౄౘ-ౙౠ-ౡ౦-౯౿ಂ-ಃಅ-ಌಎ-ಐಒ-ನಪ-ಳವ-ಹಽಾಿೀ-ೄೆೇ-ೈೊ-ೋೕ-ೖೞೠ-ೡ೦-೯ೱ-ೲം-ഃഅ-ഌഎ-ഐഒ-ഺഽാ-ീെ-ൈൊ-ൌൎൗൠ-ൡ൦-൯൰-൵൹ൺ-ൿං-ඃඅ-ඖක-නඳ-රලව-ෆා-ෑෘ-ෟ෦-෯ෲ-ෳ෴ก-ะา-ำเ-ๅๆ๏๐-๙๚-๛ກ-ຂຄງ-ຈຊຍດ-ທນ-ຟມ-ຣລວສ-ຫອ-ະາ-ຳຽເ-ໄໆ໐-໙ໜ-ໟༀ༁-༃༄-༒༓༔༕-༗༚-༟༠-༩༪-༳༴༶༸༾-༿ཀ-ཇཉ-ཬཿ྅ྈ-ྌ྾-࿅࿇-࿌࿎-࿏࿐-࿔࿕-࿘࿙-࿚က-ဪါ-ာေးျ-ြဿ၀-၉၊-၏ၐ-ၕၖ-ၗၚ-ၝၡၢ-ၤၥ-ၦၧ-ၭၮ-ၰၵ-ႁႃ-ႄႇ-ႌႎႏ႐-႙ႚ-ႜ႞-႟Ⴀ-ჅჇჍა-ჺ჻ჼჽ-ቈቊ-ቍቐ-ቖቘቚ-ቝበ-ኈኊ-ኍነ-ኰኲ-ኵኸ-ኾዀዂ-ዅወ-ዖዘ-ጐጒ-ጕጘ-ፚ፠-፨፩-፼ᎀ-ᎏᎠ-Ᏼᐁ-ᙬ᙭-᙮ᙯ-ᙿᚁ-ᚚᚠ-ᛪ᛫-᛭ᛮ-ᛰᛱ-ᛸᜀ-ᜌᜎ-ᜑᜠ-ᜱ᜵-᜶ᝀ-ᝑᝠ-ᝬᝮ-ᝰក-ឳាើ-ៅះ-ៈ។-៖ៗ៘-៚ៜ០-៩᠐-᠙ᠠ-ᡂᡃᡄ-ᡷᢀ-ᢨᢪᢰ-ᣵᤀ-ᤞᤣ-ᤦᤩ-ᤫᤰ-ᤱᤳ-ᤸ᥆-᥏ᥐ-ᥭᥰ-ᥴᦀ-ᦫᦰ-ᧀᧁ-ᧇᧈ-ᧉ᧐-᧙᧚ᨀ-ᨖᨙ-ᨚ᨞-᨟ᨠ-ᩔᩕᩗᩡᩣ-ᩤᩭ-ᩲ᪀-᪉᪐-᪙᪠-᪦ᪧ᪨-᪭ᬄᬅ-ᬳᬵᬻᬽ-ᭁᭃ-᭄ᭅ-ᭋ᭐-᭙᭚-᭠᭡-᭪᭴-᭼ᮂᮃ-ᮠᮡᮦ-ᮧ᮪ᮮ-ᮯ᮰-᮹ᮺ-ᯥᯧᯪ-ᯬᯮ᯲-᯳᯼-᯿ᰀ-ᰣᰤ-ᰫᰴ-ᰵ᰻-᰿᱀-᱉ᱍ-ᱏ᱐-᱙ᱚ-ᱷᱸ-ᱽ᱾-᱿᳀-᳇᳓᳡ᳩ-ᳬᳮ-ᳱᳲ-ᳳᳵ-ᳶᴀ-ᴫᴬ-ᵪᵫ-ᵷᵸᵹ-ᶚᶛ-ᶿḀ-ἕἘ-Ἕἠ-ὅὈ-Ὅὐ-ὗὙὛὝὟ-ώᾀ-ᾴᾶ-ᾼιῂ-ῄῆ-ῌῐ-ΐῖ-Ίῠ-Ῥῲ-ῴῶ-ῼ‎ⁱⁿₐ-ₜℂℇℊ-ℓℕℙ-ℝℤΩℨK-ℭℯ-ℴℵ-ℸℹℼ-ℿⅅ-ⅉⅎ⅏Ⅰ-ↂↃ-ↄↅ-ↈ⌶-⍺⎕⒜-ⓩ⚬⠀-⣿Ⰰ-Ⱞⰰ-ⱞⱠ-ⱻⱼ-ⱽⱾ-ⳤⳫ-ⳮⳲ-ⳳⴀ-ⴥⴧⴭⴰ-ⵧⵯ⵰ⶀ-ⶖⶠ-ⶦⶨ-ⶮⶰ-ⶶⶸ-ⶾⷀ-ⷆⷈ-ⷎⷐ-ⷖⷘ-ⷞ々〆〇〡-〩〮-〯〱-〵〸-〺〻〼ぁ-ゖゝ-ゞゟァ-ヺー-ヾヿㄅ-ㄭㄱ-ㆎ㆐-㆑㆒-㆕㆖-㆟ㆠ-ㆺㇰ-ㇿ㈀-㈜㈠-㈩㈪-㉇㉈-㉏㉠-㉻㉿㊀-㊉㊊-㊰㋀-㋋㋐-㋾㌀-㍶㍻-㏝㏠-㏾㐀-䶵一-鿌ꀀ-ꀔꀕꀖ-ꒌꓐ-ꓷꓸ-ꓽ꓾-꓿ꔀ-ꘋꘌꘐ-ꘟ꘠-꘩ꘪ-ꘫꙀ-ꙭꙮꚀ-ꚛꚜ-ꚝꚠ-ꛥꛦ-ꛯ꛲-꛷Ꜣ-ꝯꝰꝱ-ꞇ꞉-꞊Ꞌ-ꞎꞐ-ꞭꞰ-Ʇꟷꟸ-ꟹꟺꟻ-ꠁꠃ-ꠅꠇ-ꠊꠌ-ꠢꠣ-ꠤꠧ꠰-꠵꠶-꠷ꡀ-ꡳꢀ-ꢁꢂ-ꢳꢴ-ꣃ꣎-꣏꣐-꣙ꣲ-ꣷ꣸-꣺ꣻ꤀-꤉ꤊ-ꤥ꤮-꤯ꤰ-ꥆꥒ-꥓꥟ꥠ-ꥼꦃꦄ-ꦲꦴ-ꦵꦺ-ꦻꦽ-꧀꧁-꧍ꧏ꧐-꧙꧞-꧟ꧠ-ꧤꧦꧧ-ꧯ꧰-꧹ꧺ-ꧾꨀ-ꨨꨯ-ꨰꨳ-ꨴꩀ-ꩂꩄ-ꩋꩍ꩐-꩙꩜-꩟ꩠ-ꩯꩰꩱ-ꩶ꩷-꩹ꩺꩻꩽꩾ-ꪯꪱꪵ-ꪶꪹ-ꪽꫀꫂꫛ-ꫜꫝ꫞-꫟ꫠ-ꫪꫫꫮ-ꫯ꫰-꫱ꫲꫳ-ꫴꫵꬁ-ꬆꬉ-ꬎꬑ-ꬖꬠ-ꬦꬨ-ꬮꬰ-ꭚ꭛ꭜ-ꭟꭤ-ꭥꯀ-ꯢꯣ-ꯤꯦ-ꯧꯩ-ꯪ꯫꯬꯰-꯹가-힣ힰ-ퟆퟋ-ퟻ-豈-舘並-龎ff-stﬓ-ﬗＡ-Ｚａ-ｚｦ-ｯｰｱ-ﾝﾞ-ﾟﾠ-ﾾￂ-ￇￊ-ￏￒ-ￗￚ-ￜ֐־׀׃׆׈-׏א-ת׫-ׯװ-ײ׳-״׵-׿߀-߉ߊ-ߪߴ-ߵߺ߻-߿ࠀ-ࠕࠚࠤࠨ࠮-࠯࠰-࠾࠿ࡀ-ࡘ࡜-࡝࡞࡟-࢟‏יִײַ-ﬨשׁ-זּ﬷טּ-לּ﬽מּ﬿נּ-סּ﭂ףּ-פּ﭅צּ-ﭏ؈؋؍؛؜؝؞-؟ؠ-ؿـف-ي٭ٮ-ٯٱ-ۓ۔ەۥ-ۦۮ-ۯۺ-ۼ۽-۾ۿ܀-܍܎܏ܐܒ-ܯ݋-݌ݍ-ޥޱ޲-޿ࢠ-ࢲࢳ-ࣣﭐ-ﮱ﮲-﯁﯂-﯒ﯓ-ﴽ﵀-﵏ﵐ-ﶏ﶐-﶑ﶒ-ﷇ﷈-﷏ﷰ-ﷻ﷼﷾-﷿ﹰ-ﹴ﹵ﹶ-ﻼ﻽-﻾]/;

          if (pattern.toString().includes(badRegexpAsString)) {
            console.warn('WARN: replacing broken RegExp from utf8 mangling.');
            return originalRegExp(goodRegexp, scope);
          }
          return originalRegExp(pattern, scope);
        }
    })(window.RegExp);

The diff between the two regex is a single character
Original (Good) Regex has ந
Bad (Cypress) Regex replaces ந with ���

[simondiep]

I finally got the workaround to work.

The only way to access the global window object is via the onBeforeLoad function call that provides the window object.

cy.visit(MY_URL, {
      onBeforeLoad: (cypressWindow) => {
        overrideRegExpFunction(cypressWindow);
      }
    })

export function overrideRegExpFunction(globalWindow) {
  (function(originalRegExp) {
      globalWindow.RegExp = function(pattern, scope) {
        const badRegexp1AsString = "[A-Za-zªµºÀ-ÖØ-öø-ƺƻƼ-ƿǀ-ǃDŽ-ʓʔʕ-ʯʰ-ʸʻ-ˁː-ˑˠ-ˤˮͰ-ͳͶ-ͷͺͻ-ͽͿΆΈ-ΊΌΎ-ΡΣ-ϵϷ-ҁ҂Ҋ-ԯԱ-Ֆՙ՚-՟ա-և։ःऄ-हऻऽा-ीॉ-ौॎ-ॏॐक़-ॡ।-॥०-९॰ॱॲ-ঀং-ঃঅ-ঌএ-ঐও-নপ-রলশ-হঽা-ীে-ৈো-ৌৎৗড়-ঢ়য়-ৡ০-৯ৰ-ৱ৴-৹৺ਃਅ-ਊਏ-ਐਓ-ਨਪ-ਰਲ-ਲ਼ਵ-ਸ਼ਸ-ਹਾ-ੀਖ਼-ੜਫ਼੦-੯ੲ-ੴઃઅ-ઍએ-ઑઓ-નપ-રલ-ળવ-હઽા-ીૉો-ૌૐૠ-ૡ૦-૯૰ଂ-ଃଅ-ଌଏ-ଐଓ-ନପ-ରଲ-ଳଵ-ହଽାୀେ-ୈୋ-ୌୗଡ଼-ଢ଼ୟ-ୡ୦-୯୰ୱ୲-୷ஃஅ-ஊஎ-ஐஒ-கங-சஜஞ-டண-த���-பம-ஹா-ிு-ூெ-ைொ-ௌௐௗ௦-௯௰-௲ఁ-ఃఅ-ఌఎ-ఐఒ-నప-హఽు-ౄౘ-ౙౠ-ౡ౦-౯౿ಂ-ಃಅ-ಌಎ-ಐಒ-ನಪ-ಳವ-ಹಽಾಿೀ-ೄೆೇ-ೈೊ-ೋೕ-ೖೞೠ-ೡ೦-೯ೱ-ೲം-ഃഅ-ഌഎ-ഐഒ-ഺഽാ-ീെ-ൈൊ-ൌൎൗൠ-ൡ൦-൯൰-൵൹ൺ-ൿං-ඃඅ-ඖක-නඳ-රලව-ෆා-ෑෘ-ෟ෦-෯ෲ-ෳ෴ก-ะา-ำเ-ๅๆ๏๐-๙๚-๛ກ-ຂຄງ-ຈຊຍດ-ທນ-ຟມ-ຣລວສ-ຫອ-ະາ-ຳຽເ-ໄໆ໐-໙ໜ-ໟༀ༁-༃༄-༒༓༔༕-༗༚-༟༠-༩༪-༳༴༶༸༾-༿ཀ-ཇཉ-ཬཿ྅ྈ-ྌ྾-࿅࿇-࿌࿎-࿏࿐-࿔࿕-࿘࿙-࿚က-ဪါ-ာေးျ-ြဿ၀-၉၊-၏ၐ-ၕၖ-ၗၚ-ၝၡၢ-ၤၥ-ၦၧ-ၭၮ-ၰၵ-ႁႃ-ႄႇ-ႌႎႏ႐-႙ႚ-ႜ႞-႟Ⴀ-ჅჇჍა-ჺ჻ჼჽ-ቈቊ-ቍቐ-ቖቘቚ-ቝበ-ኈኊ-ኍነ-ኰኲ-ኵኸ-ኾዀዂ-ዅወ-ዖዘ-ጐጒ-ጕጘ-ፚ፠-፨፩-፼ᎀ-ᎏᎠ-Ᏼᐁ-ᙬ᙭-᙮ᙯ-ᙿᚁ-ᚚᚠ-ᛪ᛫-᛭ᛮ-ᛰᛱ-ᛸᜀ-ᜌᜎ-ᜑᜠ-ᜱ᜵-᜶ᝀ-ᝑᝠ-ᝬᝮ-ᝰក-ឳាើ-ៅះ-ៈ។-៖ៗ៘-៚ៜ០-៩᠐-᠙ᠠ-ᡂᡃᡄ-ᡷᢀ-ᢨᢪᢰ-ᣵᤀ-ᤞᤣ-ᤦᤩ-ᤫᤰ-ᤱᤳ-ᤸ᥆-᥏ᥐ-ᥭᥰ-ᥴᦀ-ᦫᦰ-ᧀᧁ-ᧇᧈ-ᧉ᧐-᧙᧚ᨀ-ᨖᨙ-ᨚ᨞-᨟ᨠ-ᩔᩕᩗᩡᩣ-ᩤᩭ-ᩲ᪀-᪉᪐-᪙᪠-᪦ᪧ᪨-᪭ᬄᬅ-ᬳᬵᬻᬽ-ᭁᭃ-᭄ᭅ-ᭋ᭐-᭙᭚-᭠᭡-᭪᭴-᭼ᮂᮃ-ᮠᮡᮦ-ᮧ᮪ᮮ-ᮯ᮰-᮹ᮺ-ᯥᯧᯪ-ᯬᯮ᯲-᯳᯼-᯿ᰀ-ᰣᰤ-ᰫᰴ-ᰵ᰻-᰿᱀-᱉ᱍ-ᱏ᱐-᱙ᱚ-ᱷᱸ-ᱽ᱾-᱿᳀-᳇᳓᳡ᳩ-ᳬᳮ-ᳱᳲ-ᳳᳵ-ᳶᴀ-ᴫᴬ-ᵪᵫ-ᵷᵸᵹ-ᶚᶛ-ᶿḀ-ἕἘ-Ἕἠ-ὅὈ-Ὅὐ-ὗὙὛὝὟ-ώᾀ-ᾴᾶ-ᾼιῂ-ῄῆ-ῌῐ-ΐῖ-Ίῠ-Ῥῲ-ῴῶ-ῼ‎ⁱⁿₐ-ₜℂℇℊ-ℓℕℙ-ℝℤΩℨK-ℭℯ-ℴℵ-ℸℹℼ-ℿⅅ-ⅉⅎ⅏Ⅰ-ↂↃ-ↄↅ-ↈ⌶-⍺⎕⒜-ⓩ⚬⠀-⣿Ⰰ-Ⱞⰰ-ⱞⱠ-ⱻⱼ-ⱽⱾ-ⳤⳫ-ⳮⳲ-ⳳⴀ-ⴥⴧⴭⴰ-ⵧⵯ⵰ⶀ-ⶖⶠ-ⶦⶨ-ⶮⶰ-ⶶⶸ-ⶾⷀ-ⷆⷈ-ⷎⷐ-ⷖⷘ-ⷞ々〆〇〡-〩〮-〯〱-〵〸-〺〻〼ぁ-ゖゝ-ゞゟァ-ヺー-ヾヿㄅ-ㄭㄱ-ㆎ㆐-㆑㆒-㆕㆖-㆟ㆠ-ㆺㇰ-ㇿ㈀-㈜㈠-㈩㈪-㉇㉈-㉏㉠-㉻㉿㊀-㊉㊊-㊰㋀-㋋㋐-㋾㌀-㍶㍻-㏝㏠-㏾㐀-䶵一-鿌ꀀ-ꀔꀕꀖ-ꒌꓐ-ꓷꓸ-ꓽ꓾-꓿ꔀ-ꘋꘌꘐ-ꘟ꘠-꘩ꘪ-ꘫꙀ-ꙭꙮꚀ-ꚛꚜ-ꚝꚠ-ꛥꛦ-ꛯ꛲-꛷Ꜣ-ꝯꝰꝱ-ꞇ꞉-꞊Ꞌ-ꞎꞐ-ꞭꞰ-Ʇꟷꟸ-ꟹꟺꟻ-ꠁꠃ-ꠅꠇ-ꠊꠌ-ꠢꠣ-ꠤꠧ꠰-꠵꠶-꠷ꡀ-ꡳꢀ-ꢁꢂ-ꢳꢴ-ꣃ꣎-꣏꣐-꣙ꣲ-ꣷ꣸-꣺ꣻ꤀-꤉ꤊ-ꤥ꤮-꤯ꤰ-ꥆꥒ-꥓꥟ꥠ-ꥼꦃꦄ-ꦲꦴ-ꦵꦺ-ꦻꦽ-꧀꧁-꧍ꧏ꧐-꧙꧞-꧟ꧠ-ꧤꧦꧧ-ꧯ꧰-꧹ꧺ-ꧾꨀ-ꨨꨯ-ꨰꨳ-ꨴꩀ-ꩂꩄ-ꩋꩍ꩐-꩙꩜-꩟ꩠ-ꩯꩰꩱ-ꩶ꩷-꩹ꩺꩻꩽꩾ-ꪯꪱꪵ-ꪶꪹ-ꪽꫀꫂꫛ-ꫜꫝ꫞-꫟ꫠ-ꫪꫫꫮ-ꫯ꫰-꫱ꫲꫳ-ꫴꫵꬁ-ꬆꬉ-ꬎꬑ-ꬖꬠ-ꬦꬨ-ꬮꬰ-ꭚ꭛ꭜ-ꭟꭤ-ꭥꯀ-ꯢꯣ-ꯤꯦ-ꯧꯩ-ꯪ꯫꯬꯰-꯹가-힣ힰ-ퟆퟋ-ퟻ-豈-舘並-龎ff-stﬓ-ﬗＡ-Ｚａ-ｚｦ-ｯｰｱ-ﾝﾞ-ﾟﾠ-ﾾￂ-ￇￊ-ￏￒ-ￗￚ-ￜ֐־׀׃׆׈-׏א-ת׫-ׯװ-ײ׳-״׵-׿߀-߉ߊ-ߪߴ-ߵߺ߻-߿ࠀ-ࠕࠚࠤࠨ࠮-࠯࠰-࠾࠿ࡀ-ࡘ࡜-࡝࡞࡟-࢟‏יִײַ-ﬨשׁ-זּ﬷טּ-לּ﬽מּ﬿נּ-סּ﭂ףּ-פּ﭅צּ-ﭏ؈؋؍؛؜؝؞-؟ؠ-ؿـف-ي٭ٮ-ٯٱ-ۓ۔ەۥ-ۦۮ-ۯۺ-ۼ۽-۾ۿ܀-܍܎܏ܐܒ-ܯ݋-݌ݍ-ޥޱ޲-޿ࢠ-ࢲࢳ-ࣣﭐ-ﮱ﮲-﯁﯂-﯒ﯓ-ﴽ﵀-﵏ﵐ-ﶏ﶐-﶑ﶒ-ﷇ﷈-﷏ﷰ-ﷻ﷼﷾-﷿ﹰ-ﹴ﹵ﹶ-ﻼ﻽-﻾]";
        const badRegexp2AsString = "[A-Za-zªµºÀ-ÖØ-öø-ƺƻƼ-ƿǀ-ǃDŽ-ʓʔʕ-ʯʰ-ʸʻ-ˁː-ˑˠ-ˤˮͰ-ͳͶ-ͷͺͻ-ͽͿΆΈ-ΊΌΎ-ΡΣ-ϵϷ-ҁ҂Ҋ-ԯԱ-Ֆՙ՚-՟ա-և։ःऄ-हऻऽा-ीॉ-ौॎ-ॏॐक़-ॡ।-॥०-९॰ॱॲ-ঀং-ঃঅ-ঌএ-ঐও-নপ-রলশ-হঽা-ীে-ৈো-ৌৎৗড়-ঢ়য়-ৡ০-৯ৰ-ৱ৴-৹৺ਃਅ-ਊਏ-ਐਓ-ਨਪ-ਰਲ-ਲ਼ਵ-ਸ਼ਸ-ਹਾ-ੀਖ਼-ੜਫ਼੦-੯ੲ-ੴઃઅ-ઍએ-ઑઓ-નપ-રલ-ળવ-હઽા-ીૉો-ૌૐૠ-ૡ૦-૯૰ଂ-ଃଅ-ଌଏ-ଐଓ-ନପ-ରଲ-ଳଵ-ହଽାୀେ-ୈୋ-ୌୗଡ଼-ଢ଼ୟ-ୡ୦-୯୰ୱ୲-୷ஃஅ-ஊஎ-ஐஒ-கங-சஜஞ-டண-தந-பம-ஹா-ிு-ூெ-ைொ-ௌௐௗ௦-௯௰-௲ఁ-ఃఅ-ఌఎ-ఐఒ-నప-హఽు-ౄౘ-ౙౠ-ౡ౦-౯౿ಂ-ಃಅ-ಌಎ-ಐಒ-ನಪ-ಳವ-ಹಽಾಿೀ-ೄೆೇ-ೈೊ-ೋೕ-ೖೞೠ-ೡ೦-೯ೱ-ೲം-ഃഅ-ഌഎ-ഐഒ-ഺഽാ-ീെ-ൈൊ-ൌൎൗൠ-ൡ൦-൯൰-൵൹ൺ-ൿං-ඃඅ-ඖක-නඳ-රලව-ෆා-ෑෘ-ෟ෦-෯ෲ-ෳ෴ก-ะา-ำเ-ๅๆ๏๐-๙๚-๛ກ-ຂຄງ-ຈຊຍດ-ທນ-ຟມ-ຣລວສ-ຫອ-ະາ-ຳຽເ-ໄໆ໐-໙ໜ-ໟༀ༁-༃༄-༒༓༔༕-༗༚-༟༠-༩༪-༳༴༶༸༾-༿ཀ-ཇཉ-ཬཿ྅ྈ-ྌ྾-࿅࿇-࿌࿎-࿏࿐-࿔࿕-࿘࿙-࿚က-ဪါ-ာေးျ-ြဿ၀-၉၊-၏ၐ-ၕၖ-ၗၚ-ၝၡၢ-ၤၥ-ၦၧ-ၭၮ-ၰၵ-ႁႃ-ႄႇ-ႌႎႏ႐-႙ႚ-ႜ႞-႟Ⴀ-ჅჇჍა-ჺ჻ჼჽ-ቈቊ-ቍቐ-ቖቘቚ-ቝበ-ኈኊ-ኍነ-ኰኲ-ኵኸ-ኾዀዂ-ዅወ-ዖዘ-ጐጒ-ጕጘ-ፚ፠-፨፩-፼ᎀ-ᎏᎠ-Ᏼᐁ-ᙬ᙭-᙮ᙯ-ᙿᚁ-ᚚᚠ-ᛪ᛫-᛭ᛮ-ᛰᛱ-ᛸᜀ-ᜌᜎ-ᜑᜠ-ᜱ᜵-᜶ᝀ-ᝑᝠ-ᝬᝮ-ᝰក-ឳាើ-ៅះ-ៈ។-៖ៗ៘-៚ៜ០-៩᠐-᠙ᠠ-ᡂᡃᡄ-ᡷᢀ-ᢨᢪᢰ-ᣵᤀ-ᤞᤣ-ᤦᤩ-ᤫᤰ-ᤱᤳ-ᤸ᥆-᥏ᥐ-ᥭᥰ-ᥴᦀ-ᦫᦰ-ᧀᧁ-ᧇᧈ-ᧉ᧐-᧙᧚ᨀ-ᨖᨙ-ᨚ᨞-᨟ᨠ-ᩔᩕᩗᩡᩣ-ᩤᩭ-ᩲ᪀-᪉᪐-᪙᪠-᪦ᪧ᪨-᪭ᬄᬅ-ᬳᬵᬻᬽ-ᭁᭃ-᭄ᭅ-ᭋ᭐-᭙᭚-᭠᭡-᭪᭴-᭼ᮂᮃ-ᮠᮡᮦ-ᮧ᮪ᮮ-ᮯ᮰-᮹��-ᯥᯧᯪ-ᯬᯮ᯲-᯳᯼-᯿ᰀ-ᰣᰤ-ᰫᰴ-ᰵ᰻-᰿᱀-᱉ᱍ-ᱏ᱐-᱙ᱚ-ᱷᱸ-ᱽ᱾-᱿᳀-᳇᳓᳡ᳩ-ᳬᳮ-ᳱᳲ-ᳳᳵ-ᳶᴀ-ᴫᴬ-ᵪᵫ-ᵷᵸᵹ-ᶚᶛ-ᶿḀ-ἕἘ-Ἕἠ-ὅὈ-Ὅὐ-ὗὙὛὝὟ-ώᾀ-ᾴᾶ-ᾼιῂ-ῄῆ-ῌῐ-ΐῖ-Ίῠ-Ῥῲ-ῴῶ-ῼ‎ⁱⁿₐ-ₜℂℇℊ-ℓℕℙ-ℝℤΩℨK-ℭℯ-ℴℵ-ℸℹℼ-ℿⅅ-ⅉⅎ⅏Ⅰ-ↂↃ-ↄↅ-ↈ⌶-⍺⎕⒜-ⓩ⚬⠀-⣿Ⰰ-Ⱞⰰ-ⱞⱠ-ⱻⱼ-ⱽⱾ-ⳤⳫ-ⳮⳲ-ⳳⴀ-ⴥⴧⴭⴰ-ⵧⵯ⵰ⶀ-ⶖⶠ-ⶦⶨ-ⶮⶰ-ⶶⶸ-ⶾⷀ-ⷆⷈ-ⷎⷐ-ⷖⷘ-ⷞ々〆〇〡-〩〮-〯〱-〵〸-〺〻〼ぁ-ゖゝ-ゞゟァ-ヺー-ヾヿㄅ-ㄭㄱ-ㆎ㆐-㆑㆒-㆕㆖-㆟ㆠ-ㆺㇰ-ㇿ㈀-㈜㈠-㈩㈪-㉇㉈-㉏㉠-㉻㉿㊀-㊉㊊-㊰㋀-㋋㋐-㋾㌀-㍶㍻-㏝㏠-㏾㐀-䶵一-鿌ꀀ-ꀔꀕꀖ-ꒌꓐ-ꓷꓸ-ꓽ꓾-꓿ꔀ-ꘋꘌꘐ-ꘟ꘠-꘩ꘪ-ꘫꙀ-ꙭꙮꚀ-ꚛꚜ-ꚝꚠ-ꛥꛦ-ꛯ꛲-꛷Ꜣ-ꝯꝰꝱ-ꞇ꞉-꞊Ꞌ-ꞎꞐ-ꞭꞰ-Ʇꟷꟸ-ꟹꟺꟻ-ꠁꠃ-ꠅꠇ-ꠊꠌ-ꠢꠣ-ꠤꠧ꠰-꠵꠶-꠷ꡀ-ꡳꢀ-ꢁꢂ-ꢳꢴ-ꣃ꣎-꣏꣐-꣙ꣲ-ꣷ꣸-꣺ꣻ꤀-꤉ꤊ-ꤥ꤮-꤯ꤰ-ꥆꥒ-꥓꥟ꥠ-ꥼꦃꦄ-ꦲꦴ-ꦵꦺ-ꦻꦽ-꧀꧁-꧍ꧏ꧐-꧙꧞-꧟ꧠ-ꧤꧦꧧ-ꧯ꧰-꧹ꧺ-ꧾꨀ-ꨨꨯ-ꨰꨳ-ꨴꩀ-ꩂꩄ-ꩋꩍ꩐-꩙꩜-꩟ꩠ-ꩯꩰꩱ-ꩶ꩷-꩹ꩺꩻꩽꩾ-ꪯꪱꪵ-ꪶꪹ-ꪽꫀꫂꫛ-ꫜꫝ꫞-꫟ꫠ-ꫪꫫꫮ-ꫯ꫰-꫱ꫲꫳ-ꫴꫵꬁ-ꬆꬉ-ꬎꬑ-ꬖꬠ-ꬦꬨ-ꬮꬰ-ꭚ꭛ꭜ-ꭟꭤ-ꭥꯀ-ꯢꯣ-ꯤꯦ-ꯧꯩ-ꯪ꯫꯬꯰-꯹가-힣ힰ-ퟆퟋ-ퟻ-豈-舘並-龎ff-stﬓ-ﬗＡ-Ｚａ-ｚｦ-ｯｰｱ-ﾝﾞ-ﾟﾠ-ﾾￂ-ￇￊ-ￏￒ-ￗￚ-ￜ֐־׀׃׆׈-׏א-ת׫-ׯװ-ײ׳-״׵-׿߀-߉ߊ-ߪߴ-ߵߺ߻-߿ࠀ-ࠕࠚࠤࠨ࠮-࠯࠰-࠾࠿ࡀ-ࡘ࡜-࡝࡞࡟-࢟‏יִײַ-ﬨשׁ-זּ﬷טּ-לּ﬽מּ﬿נּ-סּ﭂ףּ-פּ﭅צּ-ﭏ؈؋؍؛؜؝؞-؟ؠ-ؿـف-ي٭ٮ-ٯٱ-ۓ۔ەۥ-ۦۮ-ۯۺ-ۼ۽-۾ۿ܀-܍܎܏ܐܒ-ܯ݋-݌ݍ-ޥޱ޲-޿ࢠ-ࢲࢳ-ࣣﭐ-ﮱ﮲-﯁﯂-﯒ﯓ-ﴽ﵀-﵏ﵐ-ﶏ﶐-﶑ﶒ-ﷇ﷈-﷏ﷰ-ﷻ﷼﷾-﷿ﹰ-ﹴ﹵ﹶ-ﻼ﻽-﻾]";
        const goodRegexp = /[A-Za-zªµºÀ-ÖØ-öø-ƺƻƼ-ƿǀ-ǃDŽ-ʓʔʕ-ʯʰ-ʸʻ-ˁː-ˑˠ-ˤˮͰ-ͳͶ-ͷͺͻ-ͽͿΆΈ-ΊΌΎ-ΡΣ-ϵϷ-ҁ҂Ҋ-ԯԱ-Ֆՙ՚-՟ա-և։ःऄ-हऻऽा-ीॉ-ौॎ-ॏॐक़-ॡ।-॥०-९॰ॱॲ-ঀং-ঃঅ-ঌএ-ঐও-নপ-রলশ-হঽা-ীে-ৈো-ৌৎৗড়-ঢ়য়-ৡ০-৯ৰ-ৱ৴-৹৺ਃਅ-ਊਏ-ਐਓ-ਨਪ-ਰਲ-ਲ਼ਵ-ਸ਼ਸ-ਹਾ-ੀਖ਼-ੜਫ਼੦-੯ੲ-ੴઃઅ-ઍએ-ઑઓ-નપ-રલ-ળવ-હઽા-ીૉો-ૌૐૠ-ૡ૦-૯૰ଂ-ଃଅ-ଌଏ-ଐଓ-ନପ-ରଲ-ଳଵ-ହଽାୀେ-ୈୋ-ୌୗଡ଼-ଢ଼ୟ-ୡ୦-୯୰ୱ୲-୷ஃஅ-ஊஎ-ஐஒ-கங-சஜஞ-டண-தந-பம-ஹா-ிு-ூெ-ைொ-ௌௐௗ௦-௯௰-௲ఁ-ఃఅ-ఌఎ-ఐఒ-నప-హఽు-ౄౘ-ౙౠ-ౡ౦-౯౿ಂ-ಃಅ-ಌಎ-ಐಒ-ನಪ-ಳವ-ಹಽಾಿೀ-ೄೆೇ-ೈೊ-ೋೕ-ೖೞೠ-ೡ೦-೯ೱ-ೲം-ഃഅ-ഌഎ-ഐഒ-ഺഽാ-ീെ-ൈൊ-ൌൎൗൠ-ൡ൦-൯൰-൵൹ൺ-ൿං-ඃඅ-ඖක-නඳ-රලව-ෆා-ෑෘ-ෟ෦-෯ෲ-ෳ෴ก-ะา-ำเ-ๅๆ๏๐-๙๚-๛ກ-ຂຄງ-ຈຊຍດ-ທນ-ຟມ-ຣລວສ-ຫອ-ະາ-ຳຽເ-ໄໆ໐-໙ໜ-ໟༀ༁-༃༄-༒༓༔༕-༗༚-༟༠-༩༪-༳༴༶༸༾-༿ཀ-ཇཉ-ཬཿ྅ྈ-ྌ྾-࿅࿇-࿌࿎-࿏࿐-࿔࿕-࿘࿙-࿚က-ဪါ-ာေးျ-ြဿ၀-၉၊-၏ၐ-ၕၖ-ၗၚ-ၝၡၢ-ၤၥ-ၦၧ-ၭၮ-ၰၵ-ႁႃ-ႄႇ-ႌႎႏ႐-႙ႚ-ႜ႞-႟Ⴀ-ჅჇჍა-ჺ჻ჼჽ-ቈቊ-ቍቐ-ቖቘቚ-ቝበ-ኈኊ-ኍነ-ኰኲ-ኵኸ-ኾዀዂ-ዅወ-ዖዘ-ጐጒ-ጕጘ-ፚ፠-፨፩-፼ᎀ-ᎏᎠ-Ᏼᐁ-ᙬ᙭-᙮ᙯ-ᙿᚁ-ᚚᚠ-ᛪ᛫-᛭ᛮ-ᛰᛱ-ᛸᜀ-ᜌᜎ-ᜑᜠ-ᜱ᜵-᜶ᝀ-ᝑᝠ-ᝬᝮ-ᝰក-ឳាើ-ៅះ-ៈ។-៖ៗ៘-៚ៜ០-៩᠐-᠙ᠠ-ᡂᡃᡄ-ᡷᢀ-ᢨᢪᢰ-ᣵᤀ-ᤞᤣ-ᤦᤩ-ᤫᤰ-ᤱᤳ-ᤸ᥆-᥏ᥐ-ᥭᥰ-ᥴᦀ-ᦫᦰ-ᧀᧁ-ᧇᧈ-ᧉ᧐-᧙᧚ᨀ-ᨖᨙ-ᨚ᨞-᨟ᨠ-ᩔᩕᩗᩡᩣ-ᩤᩭ-ᩲ᪀-᪉᪐-᪙᪠-᪦ᪧ᪨-᪭ᬄᬅ-ᬳᬵᬻᬽ-ᭁᭃ-᭄ᭅ-ᭋ᭐-᭙᭚-᭠᭡-᭪᭴-᭼ᮂᮃ-ᮠᮡᮦ-ᮧ᮪ᮮ-ᮯ᮰-᮹ᮺ-ᯥᯧᯪ-ᯬᯮ᯲-᯳᯼-᯿ᰀ-ᰣᰤ-ᰫᰴ-ᰵ᰻-᰿᱀-᱉ᱍ-ᱏ᱐-᱙ᱚ-ᱷᱸ-ᱽ᱾-᱿᳀-᳇᳓᳡ᳩ-ᳬᳮ-ᳱᳲ-ᳳᳵ-ᳶᴀ-ᴫᴬ-ᵪᵫ-ᵷᵸᵹ-ᶚᶛ-ᶿḀ-ἕἘ-Ἕἠ-ὅὈ-Ὅὐ-ὗὙὛὝὟ-ώᾀ-ᾴᾶ-ᾼιῂ-ῄῆ-ῌῐ-ΐῖ-Ίῠ-Ῥῲ-ῴῶ-ῼ‎ⁱⁿₐ-ₜℂℇℊ-ℓℕℙ-ℝℤΩℨK-ℭℯ-ℴℵ-ℸℹℼ-ℿⅅ-ⅉⅎ⅏Ⅰ-ↂↃ-ↄↅ-ↈ⌶-⍺⎕⒜-ⓩ⚬⠀-⣿Ⰰ-Ⱞⰰ-ⱞⱠ-ⱻⱼ-ⱽⱾ-ⳤⳫ-ⳮⳲ-ⳳⴀ-ⴥⴧⴭⴰ-ⵧⵯ⵰ⶀ-ⶖⶠ-ⶦⶨ-ⶮⶰ-ⶶⶸ-ⶾⷀ-ⷆⷈ-ⷎⷐ-ⷖⷘ-ⷞ々〆〇〡-〩〮-〯〱-〵〸-〺〻〼ぁ-ゖゝ-ゞゟァ-ヺー-ヾヿㄅ-ㄭㄱ-ㆎ㆐-㆑㆒-㆕㆖-㆟ㆠ-ㆺㇰ-ㇿ㈀-㈜㈠-㈩㈪-㉇㉈-㉏㉠-㉻㉿㊀-㊉㊊-㊰㋀-㋋㋐-㋾㌀-㍶㍻-㏝㏠-㏾㐀-䶵一-鿌ꀀ-ꀔꀕꀖ-ꒌꓐ-ꓷꓸ-ꓽ꓾-꓿ꔀ-ꘋꘌꘐ-ꘟ꘠-꘩ꘪ-ꘫꙀ-ꙭꙮꚀ-ꚛꚜ-ꚝꚠ-ꛥꛦ-ꛯ꛲-꛷Ꜣ-ꝯꝰꝱ-ꞇ꞉-꞊Ꞌ-ꞎꞐ-ꞭꞰ-Ʇꟷꟸ-ꟹꟺꟻ-ꠁꠃ-ꠅꠇ-ꠊꠌ-ꠢꠣ-ꠤꠧ꠰-꠵꠶-꠷ꡀ-ꡳꢀ-ꢁꢂ-ꢳꢴ-ꣃ꣎-꣏꣐-꣙ꣲ-ꣷ꣸-꣺ꣻ꤀-꤉ꤊ-ꤥ꤮-꤯ꤰ-ꥆꥒ-꥓꥟ꥠ-ꥼꦃꦄ-ꦲꦴ-ꦵꦺ-ꦻꦽ-꧀꧁-꧍ꧏ꧐-꧙꧞-꧟ꧠ-ꧤꧦꧧ-ꧯ꧰-꧹ꧺ-ꧾꨀ-ꨨꨯ-ꨰꨳ-ꨴꩀ-ꩂꩄ-ꩋꩍ꩐-꩙꩜-꩟ꩠ-ꩯꩰꩱ-ꩶ꩷-꩹ꩺꩻꩽꩾ-ꪯꪱꪵ-ꪶꪹ-ꪽꫀꫂꫛ-ꫜꫝ꫞-꫟ꫠ-ꫪꫫꫮ-ꫯ꫰-꫱ꫲꫳ-ꫴꫵꬁ-ꬆꬉ-ꬎꬑ-ꬖꬠ-ꬦꬨ-ꬮꬰ-ꭚ꭛ꭜ-ꭟꭤ-ꭥꯀ-ꯢꯣ-ꯤꯦ-ꯧꯩ-ꯪ꯫꯬꯰-꯹가-힣ힰ-ퟆퟋ-ퟻ-豈-舘並-龎ff-stﬓ-ﬗＡ-Ｚａ-ｚｦ-ｯｰｱ-ﾝﾞ-ﾟﾠ-ﾾￂ-ￇￊ-ￏￒ-ￗￚ-ￜ֐־׀׃׆׈-׏א-ת׫-ׯװ-ײ׳-״׵-׿߀-߉ߊ-ߪߴ-ߵߺ߻-߿ࠀ-ࠕࠚࠤࠨ࠮-࠯࠰-࠾࠿ࡀ-ࡘ࡜-࡝࡞࡟-࢟‏יִײַ-ﬨשׁ-זּ﬷טּ-לּ﬽מּ﬿נּ-סּ﭂ףּ-פּ﭅צּ-ﭏ؈؋؍؛؜؝؞-؟ؠ-ؿـف-ي٭ٮ-ٯٱ-ۓ۔ەۥ-ۦۮ-ۯۺ-ۼ۽-۾ۿ܀-܍܎܏ܐܒ-ܯ݋-݌ݍ-ޥޱ޲-޿ࢠ-ࢲࢳ-ࣣﭐ-ﮱ﮲-﯁﯂-﯒ﯓ-ﴽ﵀-﵏ﵐ-ﶏ﶐-﶑ﶒ-ﷇ﷈-﷏ﷰ-ﷻ﷼﷾-﷿ﹰ-ﹴ﹵ﹶ-ﻼ﻽-﻾]/;
        if (pattern.toString().includes(badRegexp1AsString) || pattern.toString().includes(badRegexp2AsString)) {
          console.warn('CYPRESS: replacing broken RegExp from utf8 mangling.');
          return originalRegExp(goodRegexp, scope);
        }
        return originalRegExp(pattern, scope);
      }
      globalWindow.RegExp.prototype = originalRegExp.prototype;
  })(globalWindow.RegExp);
}

[simondiep]

The above will only work if you explicitly visit a specific URL. If you navigate from within an app via clicking a link or login button, this still fails.

[jennifer-shehane]

Other 'invalid regular expression' issue: #1746

[jennifer-shehane]

Could you try setting "modifyObstructiveCode": false in your cypress.json to see if this resolves your issue?

[cosmith]

I can confirm that adding modifyObstructiveCode in cypress.json fixes the issue with draft-js

[deane187]

I seem to be having the same issue with one off my tests.

In my spec file I do a cy.visit("https://app-staging.bluerobot.com");

When running the test in the cypress app it works but when I run it in CLI or CI it fails with the following error:
Invalid regular expression: /(?<!\/)$/: Invalid group

Also, When changing the URL to https://staging.bluerobot.com/login which is a different site, It works on the cypress app, CLI and CI no errors.

I added "modifyObstructiveCode": false in my cypress.json file but no luck.

Below is the logs when running in CLI

[flotwig]

@deane187 Can you share your Cypress version/OS/browser?

[deane187]

@flotwig

• Cypress 3.3.1 (NPM Install)
• Cypress.App 3.3.1
• macOS Mojave 10.14.5

The browser would be what cypress has built in.

[vrodnyanskiy]

When I added this configuration "modifyObstructiveCode": false to cypress.json
I could not run tests at all. I was getting "No tests to run screen"

[jennifer-shehane]

@deane187 I'm unable to recreate this behavior on Chrome or Electron browser.

Unfortunately we have to close this issue as there is not enough information to reproduce the problem. This does not mean that your issue is not happening - it just means that we do not have a path to move forward.

Please comment in this issue with a reproducible example and we will reopen the issue. 🙏

[SeanBE]

@jennifer-shehane we are in the process of moving over to cypress.
We are also running into the same problem as @deane187. Not sure if this should be in #1746 instead.

The problem only occurs when you're running headless. The test passes fine with a Chrome browser.
To recreate the issue, I cloned this simple boilerplate repo (https://github.com/learn-tdd-in/react),
planted const pattern = /(?<!(^-))\bA/g; into the render method of NewMessageForm.js and ran cypress run.

Setting modifyObstructiveCode": false in the cypress.json or overriding the value with -c flag does not help unfortunately.

[flotwig]

@SeanBE this does look like the same issue as #1746, let's move future discussion there