Printing characters for file.peek() in watch window - debug

Typing file.peek() in the watch window under debug mode prints this message while stepping in my code: file.peek(): Couldn't find method std::ifstream::peek.

I have added a .natvis file but I am still unable to see what the peek method is analyzing in the watch window.

I also get the error Unable to step out. Operation failed with error code 0x80004004 while trying to step out (SHIFT+F11) in my code which is probably due to gdb according to this post: #215. EDIT: I corrected the link.

• OS : Ubuntu 16.04.2 LTS
• VSCode : Version 1.14.2
• gdb : GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1
• vscode.cpptools-0.12.2

Any ideas on how to have file.peek() in the watch window show the strings?

Here is a sample code along with my natvis and json files:
debugFct.cpp:

#include <iostream>
#include <fstream>
using namespace std; // using only on test code

int main(){
    int numChar = 0;
    char numb;
    do {
        ++numChar;
        if (file.peek() == '\n')
            break;
        cout << numb << " ";
    }
    while(file.get(numb));
    return 0;
}

debug.natvis file placed in /usr/share/code/ folder:

<?xml version="1.0" encoding="utf-8"?>  
<AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">  
<Type Name="file.peek()">
    <DisplayString>{file.peek(),[1]su}</DisplayString>
</Type>
</AutoVisualizer>

launch.json:

"version": "0.2.0",
"configurations": [
        {
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceRoot}/debugFct",
            "args": ["-D_GLIBCXX_DEBUG"],
            "stopAtEntry": false,
            "cwd": "${workspaceRoot}",
            "environment": [],
            "externalConsole": true,
            "MIMode": "gdb",
            "miDebuggerPath": "/usr/bin/gdb",
            "showDisplayString": true,
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-exec -enable-pretty-printing",
                    "ignoreFailures": true
                },
                { 
                    "text": "handle SIGPIPE nostop noprint pass", 
                    "description": "ignore SIGPIPE", 
                    "ignoreFailures": true 
                }
            ]
        }
    ]

settings.json:

"files.associations": {
    "string": "cpp",
    "iostream": "cpp",
    "istream": "cpp",
    "iosfwd": "cpp"
},
"C_Cpp.intelliSenseEngine": "Default",
"code-runner.executorMap":{
    "cpp": "cd $dir && g++ $fileName -std=c++11 -o $fileNameWithoutExt && $dir$fileNameWithoutExt"
},
"editor.minimap.enabled": false,
"vsicons.presets.tsOfficial": true,
"workbench.iconTheme": "vscode-icons"

Thank you

Start with the reproduction in debugFct.cpp and its debug.natvis, launch.json, and settings.json files. Reproduce the watch-window evaluation under the listed VS Code, cpptools, Ubuntu, and gdb versions, then separate it from the SHIFT+F11 step-out error. Done means the issue has a confirmed scope and either a supported way to display the peeked characters or a documented limitation.