bug#28329: 25.2; Eshell: 40M+ output: Stack overflow in regexp matcher

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> --- Begin Message ---
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> Subject: 
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> Re: bug#28329: 25.2; Eshell: 40M+ output: Stack overflow in regexp matcher
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> Date: 
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> Sat, 02 Sep 2017 19:02:21 +0100
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> User-agent: 
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> Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)
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> Alright, I managed to get a stack trace:
>
> Debugger entered--Lisp error: (error "Stack overflow in regexp matcher")
>   
> re-search-forward("\\(\\(?:adgangskode\\|contrase\\(?:\\(?:ny\\|ñ\\)a\\)\\|geslo\\|h\\(?:\\(?:asł\\|esl\\)o\\)\\|iphasiwedi\\|jelszó\\|l\\(?:ozinka\\|ösenord\\)\\|m\\(?:ot
>  de passe\\|ật khẩu\\)\\|pa\\(?:rola\\|s\\(?:ahitza\\|s\\(?: 
> phrase\\|code\\|ord\\|phrase\\|wor[dt]\\)\\|vorto\\)\\)\\|s\\(?:alasana\\|enha\\|laptažodis\\)\\|wachtwoord\\|лозинка\\|пароль\\|ססמה\\|كلمة
>  السر\\|गुप्तशब्द\\|शब्दकूट\\|গুপ্তশব্দ\\|পাসওয়ার্ড\\|ਪਾਸਵਰਡ\\|પાસવર્ડ\\|ପ୍ରବେଶ 
> ସଙ୍କେତ\\|கடவுச்சொல்\\|సంకేతపదము\\|ಗುಪ್ತಪದ\\|അടയാളവാക്ക്\\|රහස්පදය\\|ពាក្យសម្ងាត់\\|パスワード\\|密[码碼]\\|암호\\)\\).*:\\s
>  *\\'" #<marker at 20572261 in *eshell*> t)
>   eshell-watch-for-password-prompt()
>   run-hooks(eshell-output-filter-functions)
>   eshell-run-output-filters()
>   eshell-output-filter(#<process emerge> 
> "ium/third_party/WebKit/Source/platform/network/blink_platform.WebSocketHandshakeRequest.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/network/blink_platform.WebSocketHandshakeResponse.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/plugins/blink_platform.PluginData.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/plugins/blink_platform.PluginListBuilder.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scheduler/blink_platform.CancellableTaskFactory.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ProgrammaticScrollAnimator.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ScrollAnimatorBase.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ScrollAnimatorCompositorCoordinator.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ScrollAnimator.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ScrollableArea.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.Scrollbar.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ScrollbarTheme.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ScrollbarThemeAura.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ScrollbarThemeMock.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ScrollbarThemeNonMacCommon.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/scroll/blink_platform.ScrollbarThemeOverlay.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/speech/blink_platform.PlatformSpeechSynthesisUtterance.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/speech/blink_platform.PlatformSpeechSynthesisVoice.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/speech/blink_platform.PlatformSpeechSynthesizer.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.BidiCharacterRun.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.BidiContext.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.BidiTextRun.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.DateTimeFormat.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.LineEnding.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.LocaleICU.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.LocaleToScriptMapping.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.PlatformLocale.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.QuotedPrintable.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.SegmentedString.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.StringTruncator.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.TextBoundaries.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.TextBreakIterator.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.TextBreakIteratorICU.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.TextBreakIteratorInternalICU.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.TextCheckerClient.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.TextEncodingDetector.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.TextRun.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.TextStream.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.UnicodeRange.o
>  
> obj/src/3rdparty/chromium/third_party/WebKit/Source/platform/text/blink_platform.UnicodeUtilities.o
>  ob")
>
> Apparently, the line is just plain too long...
> I guess limiting the regexp matcher over, say, the first 256 characters
> would fix the issue.
>
> --- End Message ---