insights crashed on some invalid inputs

[adromanov]

Crashed on the following piece of code:

#include <map>

int main()
// no open curly bracket here
    using Map = std::map<int, bool>;
    Map m;
    auto [it, ok] = m.insert({1, true});
}

Output is:

/home/insights/insights.cpp:5:5: error: expected function body after function declarator
    using Map = std::map<int, bool>;
    ^
/home/insights/insights.cpp:6:4: error: unknown type name 'Map'
        Map m;
        ^
/home/insights/insights.cpp:8:1: error: extraneous closing brace ('}')
}
^
[0x129475a]
....
[0x4a4407]
Segmentation fault (core dumped)

Without line

auto [it, ok] = m.insert({1, true});

there is no crash, just errors reported.

[andreasfertig]

Hello,

that's interesting. While I see the crash online, I cannot confirm it on my machine. I need to have a deeper look into it. Although, invalid code will not give a good result so its not on top of my priority list.

[adromanov]

Your local machine is on OS X, right? My is on linux and I can see a crash locally. Latest llvm+clang built with gcc-8.1.0.

[andreasfertig]

Thanks for your spec. It's correct I use OS X. I will fire up a docker container and see what's happening there. There is a chance that it is a bug which is also reachable in a different (compiling) context.