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IntelliSense internal error 1504 on malformed enum constructor declaration

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#14,817 0 comentarios 0 reacciones 0 asignados Ver en GitHub

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Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
30/100
Tipo de issue
Error
Claridad
Bastante claro
Estado de actividad
Activo
Stack tecnológico
cpp
Área
compilers

Línea de trabajo

Reproduce with the four-line repro.cpp (enum A { B, C, D }; followed by A(std::string s) {}) in a fresh workspace, with C_Cpp.loggingLevel set to Debug so the IntelliSense log shows the failure. The internal error 1504 comes from the native IntelliSense parser, so first locate where that error code is raised and what declaration state triggers it. Done looks like IntelliSense emitting ordinary syntax diagnostics for the malformed declaration instead of an internal error, with no regression in enum handling tests.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

Environment
  • OS and Version: macOS 26.6.2 (25G83), Apple M5 / ARM64; local
  • VS Code Version: 1.138.0 ARM64
  • C/C++ Extension Version: Microsoft C/C++ 1.34.4 (darwin-arm64)
  • If using SSH remote, specify OS of remote machine: N/A
Bug Summary and Steps to Reproduce

Bug Summary:
The following C++ program produces an internal error on a fresh install of vscode in the above environment.

#include <string>

enum A { B, C, D };

A(std::string s) {}

Expected: ordinary syntax diagnostics for this invalid declaration without an internal error

Configuration and Logs
c_cpp_properties.json:
{
    "configurations": [
        {
            "name": "Mac",
            "includePath": [
                "${workspaceFolder}/**"
            ],
            "defines": [],
            "cStandard": "c17",
            "intelliSenseMode": "macos-clang-arm64"
        }
    ],
    "version": 4
}
Diagnostics:
-------- Diagnostics - 10/4/2026, 7:14:27 PM
Version: 1.34.4
Current Configuration:
{
    "name": "Mac",
    "includePath": [
        "/var/folders/_r/b4g_tw1j3tq6b46wzlwc_8h00000gn/T/cpptools-repro-2d1rjnrn/workspace/**"
    ],
    "defines": [],
    "cStandard": "c17",
    "intelliSenseMode": "macos-clang-arm64",
    "compilerPathIsExplicit": true,
    "cStandardIsExplicit": true,
    "cppStandardIsExplicit": true,
    "intelliSenseModeIsExplicit": true,
    "recursiveIncludesPriorityIsExplicit": false,
    "recursiveIncludesOrderIsExplicit": false,
    "cppStandard": "c++20",
    "mergeConfigurations": false,
    "recursiveIncludes": {},
    "compilerPath": "/opt/homebrew/opt/llvm/bin/clang++",
    "browse": {
        "limitSymbolsToIncludedHeaders": true
    }
}
Modified Settings:
{
    "C_Cpp.default.compilerPath": "/opt/homebrew/opt/llvm/bin/clang++",
    "C_Cpp.default.cppStandard": "c++20",
    "C_Cpp.loggingLevel": "Debug"
}
Additional Tracked Settings:
{
    "editorTabSize": 4,
    "editorInsertSpaces": true,
    "editorAutoClosingBrackets": "languageDefined",
    "filesEncoding": "utf8",
    "filesAssociations": {},
    "filesExclude": {
        "**/.git": true,
        "**/.svn": true,
        "**/.hg": true,
        "**/.DS_Store": true,
        "**/Thumbs.db": true
    },
    "filesAutoSaveAfterDelay": false,
    "editorInlayHintsEnabled": true,
    "editorParameterHintsEnabled": true,
    "searchExclude": {
        "**/node_modules": true,
        "**/bower_components": true,
        "**/*.code-search": true
    },
    "workbenchSettingsEditor": "ui"
}
cpptools version (native): 1.34.3.0
Current database path: /Users/elliotmiller/Library/Caches/vscode-cpptools/510a4a88be99a8a17a93e2b81192563e/.browse.VC.db
Translation Unit Mappings:
[ /var/folders/_r/b4g_tw1j3tq6b46wzlwc_8h00000gn/T/cpptools-repro-2d1rjnrn/workspace/repro.cpp - source TU]:
Translation Unit Configurations:
[ /var/folders/_r/b4g_tw1j3tq6b46wzlwc_8h00000gn/T/cpptools-repro-2d1rjnrn/workspace/repro.cpp ]
    Process ID: 51480
    Memory Usage: 100 MB
    Compiler Path: /opt/homebrew/opt/llvm/bin/clang++
    Language: C++
    Include Paths:
        system include: /opt/homebrew/Cellar/llvm/23.1.0/include/c++/v1
        system include: /opt/homebrew/Cellar/llvm/23.1.0/lib/clang/23/include
        system include: /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/usr/include
        system framework search path (default): /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/System/Library/Frameworks
        system framework search path (default): /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/System/Library/SubFrameworks
        include (recursive): /var/folders/_r/b4g_tw1j3tq6b46wzlwc_8h00000gn/T/cpptools-repro-2d1rjnrn/workspace
    Standard Version: c++20
    IntelliSense Mode: macos-clang-arm64
    Other Flags:
        --clang
        --clang_version=230100
Total Memory Usage: 100 MB
Other Extensions

I repro'd this in a fresh install of vscode with only the C/C++ extension installed

Image
Additional context

No response

Lenguaje dominante
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Merge medio
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PR fusionados (30 d)
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