[llvm-bugs] [Bug 47140] New: length_error exception not being thrown

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47140

            Bug ID: 47140
           Summary: length_error exception not being thrown
           Product: clang
           Version: 10.0
          Hardware: Macintosh
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: teammember0x01 at gmail.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

This program should cause a length_error immediately but it doesn't. This
behavior is followed by GCC 10 and MetroWerks C++ compilers. 

#include <iostream>
#include <string>

using namespace std;

int main(int argc, const char * argv[])
{
    string buffer("hi");
    try {
        std::string mystring(buffer.max_size()+1, 'X');
    }

    catch(length_error &l) {
        cout<<"Caught length_error exception: "<<l.what()<<endl;
    }

    catch(exception &e) {
        cout<<"Caught exception: "<<e.what()<<endl;
    }
    return 0;
}


What actually happens is the program crashes with EXC_BAD_ACCESS on Mac OS
10.8. Clang 5.1 and Clang 10.0.0.1 have this issue.

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