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Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions #1590

Description

Before creating a new issue, please check the FAQ to see if your question is answered there.

Environment data

  • debugpy version: 1.8.1
  • OS and version: Windows 11
  • Python version: 3.11
  • Using VS Code or Visual Studio: VS Code

Actual behavior

exit(1) halts the debugging session due to an "uncaught exception"

grafik

grafik

Expected behavior

The program program should exit without the debugger halting.

Exceptions that inherit from exception.BaseException should not fall under the category of "uncaught exceptions", since they are "technically not an error"1.

exception.BaseException

The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that, use Exception).

https://docs.python.org/3/library/exceptions.html#BaseException

One of these exceptions is exception.SystemExit, which is called when calling exit(1).

exception SystemExit

This exception is raised by the sys.exit() function. It inherits from BaseException instead of Exception so that it is not accidentally caught by code that catches Exception. This allows the exception to properly propagate up and cause the interpreter to exit. When it is not handled, the Python interpreter exits; no stack traceback is printed.

https://docs.python.org/3/library/exceptions.html#SystemExit

There are only three other Exceptions that inherit from exception.BaseException, not counting exception.Exception, which does fall under the category of "Uncaught Exceptions":

BaseException
├── BaseExceptionGroup
├── GeneratorExit
├── KeyboardInterrupt
├── SystemExit
└── Exception

https://docs.python.org/3/library/exceptions.html#exception-hierarchy

exception KeyboardInterrupt

Raised when the user hits the interrupt key (normally Control-C or Delete). During execution, a check for interrupts is made regularly. The exception inherits from BaseException so as to not be accidentally caught by code that catches Exception and thus prevent the interpreter from exiting.

exception GeneratorExit

Raised when a generator or coroutine is closed; see generator.close() and coroutine.close(). It directly inherits from BaseException instead of Exception since it is technically not an error.

Footnotes

  1. https://docs.python.org/3/library/exceptions.html#GeneratorExit

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      document.querySelectorAll('pre code').forEach(function(codeBlock) {
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      btn.textContent = 'Copy';
      btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
      btn.onmouseover = function() { this.style.opacity = '1'; };
      btn.onmouseout = function() { this.style.opacity = '0.7'; };
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      navigator.clipboard.writeText(codeBlock.textContent).then(function() {
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      Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions · Issue #1590 · microsoft/debugpy · GitHub
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      Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions #1590

      Description

      Before creating a new issue, please check the FAQ to see if your question is answered there.

      Environment data

      • debugpy version: 1.8.1
      • OS and version: Windows 11
      • Python version: 3.11
      • Using VS Code or Visual Studio: VS Code

      Actual behavior

      exit(1) halts the debugging session due to an "uncaught exception"

      grafik

      grafik

      Expected behavior

      The program program should exit without the debugger halting.

      Exceptions that inherit from exception.BaseException should not fall under the category of "uncaught exceptions", since they are "technically not an error"1.

      exception.BaseException

      The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that, use Exception).

      https://docs.python.org/3/library/exceptions.html#BaseException

      One of these exceptions is exception.SystemExit, which is called when calling exit(1).

      exception SystemExit

      This exception is raised by the sys.exit() function. It inherits from BaseException instead of Exception so that it is not accidentally caught by code that catches Exception. This allows the exception to properly propagate up and cause the interpreter to exit. When it is not handled, the Python interpreter exits; no stack traceback is printed.

      https://docs.python.org/3/library/exceptions.html#SystemExit

      There are only three other Exceptions that inherit from exception.BaseException, not counting exception.Exception, which does fall under the category of "Uncaught Exceptions":

      BaseException
      ├── BaseExceptionGroup
      ├── GeneratorExit
      ├── KeyboardInterrupt
      ├── SystemExit
      └── Exception
      

      https://docs.python.org/3/library/exceptions.html#exception-hierarchy

      exception KeyboardInterrupt

      Raised when the user hits the interrupt key (normally Control-C or Delete). During execution, a check for interrupts is made regularly. The exception inherits from BaseException so as to not be accidentally caught by code that catches Exception and thus prevent the interpreter from exiting.

      exception GeneratorExit

      Raised when a generator or coroutine is closed; see generator.close() and coroutine.close(). It directly inherits from BaseException instead of Exception since it is technically not an error.

      Footnotes

      1. https://docs.python.org/3/library/exceptions.html#GeneratorExit

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          , 'i'); if (__m === '*' || __re.test(location.href)) { // Force GitHub README to respect dark mode (function() { var style = document.createElement('style'); style.textContent = ' .markdown-body { color-scheme: dark light; } .markdown-body pre { background: #161b22 !important; } .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; } .markdown-body table th, .markdown-body table td { border-color: #30363d !important; } .markdown-body img { background: #0d1117; } .markdown-body blockquote { border-left-color: #8b949e; } .markdown-body hr { border-color: #30363d; } '; document.head.appendChild(style); })(); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions · Issue #1590 · microsoft/debugpy · GitHub
          Skip to content

          Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions #1590

          Description

          Before creating a new issue, please check the FAQ to see if your question is answered there.

          Environment data

          • debugpy version: 1.8.1
          • OS and version: Windows 11
          • Python version: 3.11
          • Using VS Code or Visual Studio: VS Code

          Actual behavior

          exit(1) halts the debugging session due to an "uncaught exception"

          grafik

          grafik

          Expected behavior

          The program program should exit without the debugger halting.

          Exceptions that inherit from exception.BaseException should not fall under the category of "uncaught exceptions", since they are "technically not an error"1.

          exception.BaseException

          The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that, use Exception).

          https://docs.python.org/3/library/exceptions.html#BaseException

          One of these exceptions is exception.SystemExit, which is called when calling exit(1).

          exception SystemExit

          This exception is raised by the sys.exit() function. It inherits from BaseException instead of Exception so that it is not accidentally caught by code that catches Exception. This allows the exception to properly propagate up and cause the interpreter to exit. When it is not handled, the Python interpreter exits; no stack traceback is printed.

          https://docs.python.org/3/library/exceptions.html#SystemExit

          There are only three other Exceptions that inherit from exception.BaseException, not counting exception.Exception, which does fall under the category of "Uncaught Exceptions":

          BaseException
          ├── BaseExceptionGroup
          ├── GeneratorExit
          ├── KeyboardInterrupt
          ├── SystemExit
          └── Exception
          

          https://docs.python.org/3/library/exceptions.html#exception-hierarchy

          exception KeyboardInterrupt

          Raised when the user hits the interrupt key (normally Control-C or Delete). During execution, a check for interrupts is made regularly. The exception inherits from BaseException so as to not be accidentally caught by code that catches Exception and thus prevent the interpreter from exiting.

          exception GeneratorExit

          Raised when a generator or coroutine is closed; see generator.close() and coroutine.close(). It directly inherits from BaseException instead of Exception since it is technically not an error.

          Footnotes

          1. https://docs.python.org/3/library/exceptions.html#GeneratorExit

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              , 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions · Issue #1590 · microsoft/debugpy · GitHub
              Skip to content

              Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions #1590

              Description

              Before creating a new issue, please check the FAQ to see if your question is answered there.

              Environment data

              • debugpy version: 1.8.1
              • OS and version: Windows 11
              • Python version: 3.11
              • Using VS Code or Visual Studio: VS Code

              Actual behavior

              exit(1) halts the debugging session due to an "uncaught exception"

              grafik

              grafik

              Expected behavior

              The program program should exit without the debugger halting.

              Exceptions that inherit from exception.BaseException should not fall under the category of "uncaught exceptions", since they are "technically not an error"1.

              exception.BaseException

              The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that, use Exception).

              https://docs.python.org/3/library/exceptions.html#BaseException

              One of these exceptions is exception.SystemExit, which is called when calling exit(1).

              exception SystemExit

              This exception is raised by the sys.exit() function. It inherits from BaseException instead of Exception so that it is not accidentally caught by code that catches Exception. This allows the exception to properly propagate up and cause the interpreter to exit. When it is not handled, the Python interpreter exits; no stack traceback is printed.

              https://docs.python.org/3/library/exceptions.html#SystemExit

              There are only three other Exceptions that inherit from exception.BaseException, not counting exception.Exception, which does fall under the category of "Uncaught Exceptions":

              BaseException
              ├── BaseExceptionGroup
              ├── GeneratorExit
              ├── KeyboardInterrupt
              ├── SystemExit
              └── Exception
              

              https://docs.python.org/3/library/exceptions.html#exception-hierarchy

              exception KeyboardInterrupt

              Raised when the user hits the interrupt key (normally Control-C or Delete). During execution, a check for interrupts is made regularly. The exception inherits from BaseException so as to not be accidentally caught by code that catches Exception and thus prevent the interpreter from exiting.

              exception GeneratorExit

              Raised when a generator or coroutine is closed; see generator.close() and coroutine.close(). It directly inherits from BaseException instead of Exception since it is technically not an error.

              Footnotes

              1. https://docs.python.org/3/library/exceptions.html#GeneratorExit

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                  , 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions · Issue #1590 · microsoft/debugpy · GitHub
                  Skip to content

                  Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions #1590

                  Description

                  Before creating a new issue, please check the FAQ to see if your question is answered there.

                  Environment data

                  • debugpy version: 1.8.1
                  • OS and version: Windows 11
                  • Python version: 3.11
                  • Using VS Code or Visual Studio: VS Code

                  Actual behavior

                  exit(1) halts the debugging session due to an "uncaught exception"

                  grafik

                  grafik

                  Expected behavior

                  The program program should exit without the debugger halting.

                  Exceptions that inherit from exception.BaseException should not fall under the category of "uncaught exceptions", since they are "technically not an error"1.

                  exception.BaseException

                  The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that, use Exception).

                  https://docs.python.org/3/library/exceptions.html#BaseException

                  One of these exceptions is exception.SystemExit, which is called when calling exit(1).

                  exception SystemExit

                  This exception is raised by the sys.exit() function. It inherits from BaseException instead of Exception so that it is not accidentally caught by code that catches Exception. This allows the exception to properly propagate up and cause the interpreter to exit. When it is not handled, the Python interpreter exits; no stack traceback is printed.

                  https://docs.python.org/3/library/exceptions.html#SystemExit

                  There are only three other Exceptions that inherit from exception.BaseException, not counting exception.Exception, which does fall under the category of "Uncaught Exceptions":

                  BaseException
                  ├── BaseExceptionGroup
                  ├── GeneratorExit
                  ├── KeyboardInterrupt
                  ├── SystemExit
                  └── Exception
                  

                  https://docs.python.org/3/library/exceptions.html#exception-hierarchy

                  exception KeyboardInterrupt

                  Raised when the user hits the interrupt key (normally Control-C or Delete). During execution, a check for interrupts is made regularly. The exception inherits from BaseException so as to not be accidentally caught by code that catches Exception and thus prevent the interpreter from exiting.

                  exception GeneratorExit

                  Raised when a generator or coroutine is closed; see generator.close() and coroutine.close(). It directly inherits from BaseException instead of Exception since it is technically not an error.

                  Footnotes

                  1. https://docs.python.org/3/library/exceptions.html#GeneratorExit

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                      , 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions · Issue #1590 · microsoft/debugpy · GitHub
                      Skip to content

                      Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions #1590

                      Description

                      Before creating a new issue, please check the FAQ to see if your question is answered there.

                      Environment data

                      • debugpy version: 1.8.1
                      • OS and version: Windows 11
                      • Python version: 3.11
                      • Using VS Code or Visual Studio: VS Code

                      Actual behavior

                      exit(1) halts the debugging session due to an "uncaught exception"

                      grafik

                      grafik

                      Expected behavior

                      The program program should exit without the debugger halting.

                      Exceptions that inherit from exception.BaseException should not fall under the category of "uncaught exceptions", since they are "technically not an error"1.

                      exception.BaseException

                      The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that, use Exception).

                      https://docs.python.org/3/library/exceptions.html#BaseException

                      One of these exceptions is exception.SystemExit, which is called when calling exit(1).

                      exception SystemExit

                      This exception is raised by the sys.exit() function. It inherits from BaseException instead of Exception so that it is not accidentally caught by code that catches Exception. This allows the exception to properly propagate up and cause the interpreter to exit. When it is not handled, the Python interpreter exits; no stack traceback is printed.

                      https://docs.python.org/3/library/exceptions.html#SystemExit

                      There are only three other Exceptions that inherit from exception.BaseException, not counting exception.Exception, which does fall under the category of "Uncaught Exceptions":

                      BaseException
                      ├── BaseExceptionGroup
                      ├── GeneratorExit
                      ├── KeyboardInterrupt
                      ├── SystemExit
                      └── Exception
                      

                      https://docs.python.org/3/library/exceptions.html#exception-hierarchy

                      exception KeyboardInterrupt

                      Raised when the user hits the interrupt key (normally Control-C or Delete). During execution, a check for interrupts is made regularly. The exception inherits from BaseException so as to not be accidentally caught by code that catches Exception and thus prevent the interpreter from exiting.

                      exception GeneratorExit

                      Raised when a generator or coroutine is closed; see generator.close() and coroutine.close(). It directly inherits from BaseException instead of Exception since it is technically not an error.

                      Footnotes

                      1. https://docs.python.org/3/library/exceptions.html#GeneratorExit

                      Metadata

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                      Assignees

                      No one assigned

                        Labels

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                        No type

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                          No milestone

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                          None yet

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                          No branches or pull requests

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                          , 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions · Issue #1590 · microsoft/debugpy · GitHub
                          Skip to content

                          Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions #1590

                          Description

                          Before creating a new issue, please check the FAQ to see if your question is answered there.

                          Environment data

                          • debugpy version: 1.8.1
                          • OS and version: Windows 11
                          • Python version: 3.11
                          • Using VS Code or Visual Studio: VS Code

                          Actual behavior

                          exit(1) halts the debugging session due to an "uncaught exception"

                          grafik

                          grafik

                          Expected behavior

                          The program program should exit without the debugger halting.

                          Exceptions that inherit from exception.BaseException should not fall under the category of "uncaught exceptions", since they are "technically not an error"1.

                          exception.BaseException

                          The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that, use Exception).

                          https://docs.python.org/3/library/exceptions.html#BaseException

                          One of these exceptions is exception.SystemExit, which is called when calling exit(1).

                          exception SystemExit

                          This exception is raised by the sys.exit() function. It inherits from BaseException instead of Exception so that it is not accidentally caught by code that catches Exception. This allows the exception to properly propagate up and cause the interpreter to exit. When it is not handled, the Python interpreter exits; no stack traceback is printed.

                          https://docs.python.org/3/library/exceptions.html#SystemExit

                          There are only three other Exceptions that inherit from exception.BaseException, not counting exception.Exception, which does fall under the category of "Uncaught Exceptions":

                          BaseException
                          ├── BaseExceptionGroup
                          ├── GeneratorExit
                          ├── KeyboardInterrupt
                          ├── SystemExit
                          └── Exception
                          

                          https://docs.python.org/3/library/exceptions.html#exception-hierarchy

                          exception KeyboardInterrupt

                          Raised when the user hits the interrupt key (normally Control-C or Delete). During execution, a check for interrupts is made regularly. The exception inherits from BaseException so as to not be accidentally caught by code that catches Exception and thus prevent the interpreter from exiting.

                          exception GeneratorExit

                          Raised when a generator or coroutine is closed; see generator.close() and coroutine.close(). It directly inherits from BaseException instead of Exception since it is technically not an error.

                          Footnotes

                          1. https://docs.python.org/3/library/exceptions.html#GeneratorExit

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                              , 'i'); if (__m === '*' || __re.test(location.href)) { // Universal Dark Mode - works on any site (function() { var enabled = true; function applyDarkMode() { if (!enabled) return; // Create style element if it doesn't exist var style = document.getElementById('universal-dark-mode-style'); if (!style) { style = document.createElement('style'); style.id = 'universal-dark-mode-style'; document.head.appendChild(style); } // Dark mode CSS - inverts colors but preserves images/video style.textContent = ' /* Invert everything except media */ html { filter: invert(1) hue-rotate(180deg) !important; background: #1a1a2e !important; } /* Restore images, videos, iframes, canvas */ img, video, iframe, canvas, svg, picture, [style*="background-image"] { filter: invert(1) hue-rotate(180deg) !important; } /* Preserve specific elements that should not be inverted */ .no-dark-mode, .no-dark-mode *, [data-theme="light"], [data-theme="light"], .ace_editor, .ace_editor *, .CodeMirror, .CodeMirror *, .monaco-editor, .monaco-editor *, .markdown-body pre, .markdown-body pre *, .highlight, .highlight *, pre code, pre code * { filter: none !important; } /* Fix common UI elements */ .modal, .popup, .dropdown-menu, .tooltip, .popover { filter: invert(1) hue-rotate(180deg) !important; background: #2d2d44 !important; border-color: #444 !important; } /* Scrollbars */ ::-webkit-scrollbar { background: #1a1a2e !important; } ::-webkit-scrollbar-thumb { background: #444 !important; } ::-webkit-scrollbar-thumb:hover { background: #555 !important; } /* Selection */ ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; } ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; } '; } function removeDarkMode() { var style = document.getElementById('universal-dark-mode-style'); if (style) style.remove(); } // Toggle with Alt+Shift+D document.addEventListener('keydown', function(e) { if (e.altKey && e.shiftKey && e.key === 'D') { e.preventDefault(); enabled = !enabled; if (enabled) { applyDarkMode(); console.log('[Universal Dark Mode] Enabled'); } else { removeDarkMode(); console.log('[Universal Dark Mode] Disabled'); } } }); // Apply on load applyDarkMode(); // Re-apply on dynamic content var observer = new MutationObserver(function(mutations) { if (enabled && !document.getElementById('universal-dark-mode-style')) { applyDarkMode(); } }); observer.observe(document.head, { childList: true }); console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle'); })(); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })(); Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions · Issue #1590 · microsoft/debugpy · GitHub
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                              Exceptions that inherit from BaseException should not be treated as Uncaught Exceptions #1590

                              Description

                              Before creating a new issue, please check the FAQ to see if your question is answered there.

                              Environment data

                              • debugpy version: 1.8.1
                              • OS and version: Windows 11
                              • Python version: 3.11
                              • Using VS Code or Visual Studio: VS Code

                              Actual behavior

                              exit(1) halts the debugging session due to an "uncaught exception"

                              grafik

                              grafik

                              Expected behavior

                              The program program should exit without the debugger halting.

                              Exceptions that inherit from exception.BaseException should not fall under the category of "uncaught exceptions", since they are "technically not an error"1.

                              exception.BaseException

                              The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that, use Exception).

                              https://docs.python.org/3/library/exceptions.html#BaseException

                              One of these exceptions is exception.SystemExit, which is called when calling exit(1).

                              exception SystemExit

                              This exception is raised by the sys.exit() function. It inherits from BaseException instead of Exception so that it is not accidentally caught by code that catches Exception. This allows the exception to properly propagate up and cause the interpreter to exit. When it is not handled, the Python interpreter exits; no stack traceback is printed.

                              https://docs.python.org/3/library/exceptions.html#SystemExit

                              There are only three other Exceptions that inherit from exception.BaseException, not counting exception.Exception, which does fall under the category of "Uncaught Exceptions":

                              BaseException
                              ├── BaseExceptionGroup
                              ├── GeneratorExit
                              ├── KeyboardInterrupt
                              ├── SystemExit
                              └── Exception
                              

                              https://docs.python.org/3/library/exceptions.html#exception-hierarchy

                              exception KeyboardInterrupt

                              Raised when the user hits the interrupt key (normally Control-C or Delete). During execution, a check for interrupts is made regularly. The exception inherits from BaseException so as to not be accidentally caught by code that catches Exception and thus prevent the interpreter from exiting.

                              exception GeneratorExit

                              Raised when a generator or coroutine is closed; see generator.close() and coroutine.close(). It directly inherits from BaseException instead of Exception since it is technically not an error.

                              Footnotes

                              1. https://docs.python.org/3/library/exceptions.html#GeneratorExit

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