Watching local variables of types vectors, maps etc. is empty when debugging C++ with lldb #1768
Description
- VSCode Version Insiders: March 2018 v1.22
- VSCode Version Stable: February 2018 v1.21
(Same thing happens on both) - OS Version: macOS High Sierra 10.13.3
- C/C++ extension version: 0.16.1
Steps to Reproduce:
// app.cpp
#include <iostream>
#include <vector>
#include <map>
#include <string>
int main() {
int i = 4;
std::string s = "four";
std::vector<int> v;
std::map<int,std::string> m;
v.push_back(2);
v.push_back(1);
v.push_back(3);
m.insert(std::make_pair(2,"two"));
m.insert(std::make_pair(1,"one"));
m.insert(std::make_pair(3,"three"));
}
// launch.json
{
"version": "0.2.0",
"configurations": [
{
"name": "(lldb) Launch",
"type": "cppdbg",
"request": "launch",
"program": "${workspaceFolder}/app",
"args": [],
"stopAtEntry": false,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": false,
"MIMode": "lldb"
}
]
}
Built with:
g++ -o app app.cpp -g -Wall -std=c++17 -lstdc++
Watchlist shows this at breakpoint for last statement in main:
i: 4
s: "four"
v: size=0
m: size=0
Using lldb manually from terminal shows correct content of v, and m:
Process 8715 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
frame #0: 0x00000001000018d5 app`main at app.cpp:18
15 v.push_back(3);
16 m.insert(std::make_pair(2,"two"));
17 m.insert(std::make_pair(1,"one"));
-> 18 m.insert(std::make_pair(3,"three"));
19 }
20
21
Target 0: (app) stopped.
(lldb) p m
(std::__1::map<int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::less<int>, std::__1::allocator<std::__1::pair<const int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > >) $0 = size=2 {
[0] = (first = 1, second = "one")
[1] = (first = 2, second = "two")
}
(lldb) p s
(std::__1::string) $1 = "four"
(lldb) p v
(std::__1::vector<int, std::__1::allocator<int> >) $2 = size=3 {
[0] = 2
[1] = 1
[2] = 3
}
Output console:
Extensions:
waiting for v8 protocol on stdin/stdout