Python Exception <class 'IndexError'> list index out of range

[Jeffrey Walton]

I'm attempting to debug a C++ program in a debug configuration under GDB. GDB seems to be having some trouble due to Python:

Catchpoint 1 (exception thrown), 0x00007ffff7b348b0 in __cxa_throw ()
   from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
(gdb) where
#0 0x00007ffff7b348b0 in __cxa_throw ()
   from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#1 0x00000000004d71b1 in SignalTestError () at datatest.cpp:67
Python Exception <class 'IndexError'> list index out of range:
#2 0x00000000004d73c0 in GetRequiredDatum (
    data=std::__debug::map with 7 elements, name=0x6fdab7 "KeyFormat")
    at datatest.cpp:80
Python Exception <class 'IndexError'> list index out of range:
#3 0x00000000004d8375 in TestSignatureScheme (
    v=std::__debug::map with 7 elements) at datatest.cpp:244
#4 0x00000000004dd42f in TestDataFile (
    filename="TestVectors/dsa_rfc6979.txt", overrideParameters=...,
    totalTests=@0x7fffffffd3a8: 0, failedTests=@0x7fffffffd3ac: 0)
    at datatest.cpp:775
#5 0x00000000004dda56 in RunTestDataFile (
    filename=0xb732a8 "TestVectors/dsa_rfc6979.txt", overrideParameters=...,
    thorough=true) at datatest.cpp:824
#6 0x000000000046a313 in main (argc=3, argv=0x7fffffffdf98) at test.cpp:288

**********

The program is in a Debug configuration, which means CXXFLAGS="-DDEBUG -g3 -O0". In addition, because DEBUG is defined, -D_GLIBCXX_CONCEPT_CHECKS and -D_GLIBCXX_DEBUG defined, too. (We test under a number of odd configurations, like a debug configuration of Glibc and concept checks).

[Jeffrey Walton (noloader)]

Change to GDB.

It sure would be nice if someone took the time to fix Launchpad and its broke package search. When looking up GDB, "Too many matches. Please try to narrow your search" is a useless error message. It would be better to give someone the damn result.

[Jeffrey Walton (noloader)]

$ apt-cache showpkg gdb
Package: gdb
Versions:
7.7.1-0ubuntu5~14.04.2 (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_trusty-updates_main_binary-amd64_Packages) (/var/lib/dpkg/status)
 Description Language:
                 File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_trusty_main_binary-amd64_Packages
                  MD5: 4f2b8eb95df2ba7a5b11e0301c48b8e4
 Description Language: en
                 File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_trusty_main_i18n_Translation-en
                  MD5: 4f2b8eb95df2ba7a5b11e0301c48b8e4

7.7-0ubuntu3 (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_trusty_main_binary-amd64_Packages)
 Description Language:
                 File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_trusty_main_binary-amd64_Packages
                  MD5: 4f2b8eb95df2ba7a5b11e0301c48b8e4
 Description Language: en
                 File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_trusty_main_i18n_Translation-en
                  MD5: 4f2b8eb95df2ba7a5b11e0301c48b8e4

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