https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83263
Bug ID: 83263
Summary: [8.0 regression] segmentation fault in alloc_traits
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: juergen.reuter at desy dot de
Target Milestone: ---
Created attachment 42782
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42782&action=edit
reproducer
The following code is a simple XDR reader which produces the following
segmentation violations when run on a simple XDR file (attached). The latest
version which did not show the problems was r253161, the first where I observed
the issue r254916.
The reproducer tarball contains the header files, the C++ files, the Makefile
and the XDR example file stdhep_4_p.hep to be read in by the produced
executable.
This is the compilation chain:
g++ -c WOXDR.cpp
g++ -c WOStdHep.cpp
g++ -c WOStdHepRdr.cpp
g++ WOXDR.o WOStdHep.o WOStdHepRdr.o -ldl -lstdc++ -o stdhep_rd StdHepRdr.cpp
This is the backtrace:
Program received signal SIGSEGV, Segmentation fault.
__GI___libc_free (mem=0x6530302e30202c30) at malloc.c:2931
2931 malloc.c: No such file or directory.
(gdb) bt
#0 __GI___libc_free (mem=0x6530302e30202c30) at malloc.c:2931
#1 0x00007ffff7963c06 in deallocate (this=0x7fffffffda60, __p=<optimized out>)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/ext/new_allocator.h:125
#2 deallocate (__a=..., __n=<optimized out>, __p=<optimized out>) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/alloc_traits.h:462
#3 _M_destroy (__size=<optimized out>, this=0x7fffffffda60) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:226
#4 _M_dispose (this=0x7fffffffda60) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:221
#5 ~basic_string (this=0x7fffffffda60, __in_chrg=<optimized out>) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:647
#6 ~basic_stringbuf (this=0x7fffffffda18, __in_chrg=<optimized out>) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/sstream:65
#7 std::__cxx11::basic_stringstream<char, std::char_traits<char>,
std::allocator<char> >::~basic_stringstream (this=0x7fffffffda00,
__in_chrg=<optimized out>, __vtt_parm=<optimized out>)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/sstream:732
#8 0x0000000000407cb7 in WOUTIL::WOStdHepRdr::readEvent(std::ostream&, int) ()
#9 0x0000000000408854 in main ()
Originally I believed this to be a problem in the bind(C) implementation but
apparently it seemed to appear also for standalone C++ code. Here is the
Fortran bind(C) example:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83230
The expected output of the XDR reader is the following:
====================================================
WHIZARD StdHep Reader :
opened file : stdhep_4_p.hep
====== File Header ===========
total blocks: 847
version: 2.01
title: WHIZARD 2.6.2
comment: No comment
date: Sun Dec 3 13:52:19 2017
closing date: Sun Dec 3 13:52:19 2017
expected events: 3
events: 5
firstTable: -1
dimTable: 100
nNTuples: 0
nBlocks: 8
block names:
: Standard HEP COMMON block, see STDHEP Product
: Standard HEP COMMON block with multiple interaction, see
STDHEP Product
: Stdhep begin run record, see STDHEP Product
: Stdhep end run record, see STDHEP Product
: Standard HEP COMMON block with Les Houches, see STDHEP
Product
: Standard HEP COMMON block with Les Houches and multiple
interaction
: Les Houches HEPEUP common block
: Les Houches HEPRUP common block
=============================
Event #0
[ id ]index| PDG |q(el)| px, py, pz | energy |
mass |sta| vertex x, y , z | spin |
colorflow | [daughters]
[00000000] 0| 11|-1.00| 0.00e+00, 0.00e+00, 2.50e+02| 2.50e+02|
5.11e-04| 2 | 0.00e+00, 0.00e+00, 0.00e+00| 0.00e+00, 0.00e+00, 0.00e+00| (0,
0) | [ 2, 3 ]
[00000001] 1| -11| 1.00| 0.00e+00, 0.00e+00, -2.50e+02| 2.50e+02|
5.11e-04| 2 | 0.00e+00, 0.00e+00, 0.00e+00| 0.00e+00, 0.00e+00, 0.00e+00| (0,
0) | [ 2, 3 ]
[00000002] 2| 15|-1.00| 1.42e+02, 1.99e+02, -5.22e+01| 2.50e+02|
1.78e+00| 1 | 0.00e+00, 0.00e+00, 0.00e+00| 0.00e+00, 0.00e+00, 0.00e+00| (0,
0) | [ 0, 0 ]
[00000003] 3| -15| 1.00|-1.42e+02,-1.99e+02, 5.22e+01| 2.50e+02|
1.78e+00| 1 | 0.00e+00, 0.00e+00, 0.00e+00| 0.00e+00, 0.00e+00, 0.00e+00| (0,
0) | [ 0, 0 ]
converted 1 events - written to stdout
====================================================
