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Bug 1976887 - ../../gdb/gdbtypes.c:5438: internal-error: Unexpected type field location kind: 4
Summary: ../../gdb/gdbtypes.c:5438: internal-error: Unexpected type field location kin...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: gdb
Version: 34
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Alexandra Petlanová Hájková
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-06-28 13:09 UTC by Jonathan Wakely
Modified: 2021-06-28 15:25 UTC (History)
8 users (show)

Fixed In Version:
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Last Closed:
Type: Bug
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Description Jonathan Wakely 2021-06-28 13:09:33 UTC
Description of problem:

GDB crashes when debugging C++ programs.

Version-Release number of selected component (if applicable):

gdb-10.2-3.fc34.x86_64



How reproducible:

Always

Steps to Reproduce:
Compile this code with g++ -g sb.C (using any recent GCC, although the line 221 used below is for Fedora's default compiler, gcc-c++-11.1.1-3.fc34):

#include <sstream>
#include <stdio.h>

int main()
{
  std::istringstream in(" abc");
  std::ostringstream out;
  in >> out.rdbuf();
  puts(out.str().c_str());
}

Then run:

gdb -q  -ex start -ex n -ex n -ex step -ex finish -ex step -ex n -ex "br 221" -ex r a.out

It crashes:

Reading symbols from a.out...
Temporary breakpoint 1 at 0x4022f2: file sb.cc, line 6.
Starting program: /tmp/a.out 

Temporary breakpoint 1, main () at sb.cc:6
6         std::istringstream in(" abc");
7         std::ostringstream out;
8         in >> out.rdbuf();
std::__cxx11::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::rdbuf (this=0x7fffffffd400)
    at /usr/src/debug/gcc-11.1.1-3.fc34.x86_64/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/include/sstream:908
908           rdbuf() const
Run till exit from #0  std::__cxx11::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::rdbuf (this=0x7fffffffd400)
    at /usr/src/debug/gcc-11.1.1-3.fc34.x86_64/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/include/sstream:908
0x0000000000402364 in main () at sb.cc:8
8         in >> out.rdbuf();
Value returned is $1 = (std::__cxx11::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::__stringbuf_type *) 0x7fffffffd408
std::istream::operator>> (this=0x7fffffffd580, __sbout=0x7fffffffd408)
    at /usr/src/debug/gcc-11.1.1-3.fc34.x86_64/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/include/bits/istream.tcc:211
211         basic_istream<_CharT, _Traits>::
734           operator bool() const
Breakpoint 2 at 0x7ffff7e3ec40: /usr/src/debug/gcc-11.1.1-3.fc34.x86_64/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/include/istream:221. (8 locations)
The program being debugged has been started already.
Start it from the beginning? (y or n) y
../../gdb/gdbtypes.c:5438: internal-error: Unexpected type field location kind: 4
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) y

This is a bug, please report it.  For instructions, see:
<https://www.gnu.org/software/gdb/bugs/>.

../../gdb/gdbtypes.c:5438: internal-error: Unexpected type field location kind: 4
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) n


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