GDB Crash during debugging session due to libstdcxx.v6.printers import register_libstdcxx_printers

[Jeffrey Walton]

While attempting to debug a simple C++, program, GDB crashes. The program is below:

$ gdb
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
...
(gdb) file ./cryptopp-test.exe
Reading symbols from ./cryptopp-test.exe...done.
(gdb) r
Starting program: /home/user/cryptopp-test.exe
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module>
    from libstdcxx.v6.printers import register_libstdcxx_printers
ImportError: No module named 'libstdcxx'

Program received signal SIGSEGV, Segmentation fault.
Segmentation fault

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This appears to be a Debian bug from February, 2013: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=701935.

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I'm on Ubuntu 14.04, x86_64 fully patched. I'm using Gnome-Fallback desktop (it seems many think everything is a tablet now. I'd like to get a hold of the drugs the folks at Microsoft, Fedora, Ubuntu (etc) are using for recreational purposes, too).

$ uname -a
Linux ubuntu 3.13.0-57-generic #95-Ubuntu SMP Fri Jun 19 09:28:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$ lsb_release
No LSB modules are available.

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The program below is going to provide (or not provide) heuristic evidence of a bias in the Random Number Generator. The crash occurs with different symbol levels (-g) and optimizations (-O).

// g++ -DDEBUG=1 -g3 -Og -Wall -Wextra -Wno-unused-parameter \
// -I/usr/local/include/cryptopp cryptopp-test.cpp \
// /usr/local/lib/libcryptopp.a -o cryptopp-test.exe

static const word32 MIN_VAL = 0, MAX_VAL = 2;
static const word32 RANGE = MAX_VAL - MIN_VAL + 1;
static const unsigned int ITERATIONS = 100000;

int main(int argc, char* argv[])
{
    try {

        RandomNumberGenerator rng;
        vector<unsigned int>buckets;
        buckets.resize(RANGE);

        for(unsigned int i = 0; i < ITERATIONS; i++)
            buckets[rng.GenerateWord32(MIN_VAL, MAX_VAL)]++;

        for(unsigned int j = 0; j < RANGE; j++)
            cout << j << ": " << buckets[j] << endl;
    }
    catch(CryptoPP::Exception& ex)
    {
        cerr << ex.what() << endl;
    }

    return 0;
}