Re: io test seg faults

[Martin Sebor <se...@roguewave.com>]

Scott Zhong wrote:
> http://issues.apache.org/jira/browse/STDCXX-196

I'm not sure what's going on yet but I have been able to reproduce
the behavior in a fairly small test case (but not independent of
stdcxx). Somehow, rethrowing the caught exception causes the fault.

$ cat t.cpp && nice make t && ./t || gdb64 -q t
#include <sstream>

int main ()
{
     std::istringstream strm ("");

     strm.exceptions (strm.eofbit | strm.failbit);

     try {
         try {
             strm.get ();
         }
         catch (...) {
             throw;
         }
     }
     catch (...) {
         return 0;
     }

     return 1;
}

xlc_r -c -I/amd/devco/sebor/dev/stdlib/include/ansi -D_RWSTDDEBUG 
-D_RWSTD_USE_CONFIG -I/amd/devco/sebor/dev/stdlib/include 
-I/build/sebor/xlc-8.0-15S/include 
-I/amd/devco/sebor/dev/stdlib/../rwtest 
-I/amd/devco/sebor/dev/stdlib/../rwtest/include 
-I/amd/devco/sebor/dev/stdlib/tests/include 
-F/package/1/ppc64/compilers/ibm/va80/vac.cfg -g  -q64 
-qtemplateregistry=t.ti   t.cpp
xlc_r t.o -o t -L/build/sebor/xlc-8.0-15S/rwtest -lrwtest15S 
-F/package/1/ppc64/compilers/ibm/va80/vac.cfg 
-I/amd/devco/sebor/dev/stdlib/include/ansi -D_RWSTDDEBUG 
-D_RWSTD_USE_CONFIG   -q64 -I/amd/devco/sebor/dev/stdlib/include/ansi 
-D_RWSTDDEBUG    -D_RWSTD_USE_CONFIG 
-I/amd/devco/sebor/dev/stdlib/include -I/build/sebor/xlc-8.0-15S/include 
-I/amd/devco/sebor/dev/stdlib/../rwtest 
-I/amd/devco/sebor/dev/stdlib/../rwtest/include 
-I/amd/devco/sebor/dev/stdlib/tests/include  -qtemplateregistry=.ti 
-L/build/sebor/xlc-8.0-15S/lib -lstd15S  -lxlopt -lxl -libmc++ -lsupc++ 
-lgcc -lgcc_eh -lc -lm
Segmentation fault
Using host libthread_db library "/lib64/tls/libthread_db.so.1".
(gdb) run
Starting program: /build/sebor/xlc-8.0-15S/tests/t
[Thread debugging using libthread_db enabled]
[New Thread 549758541856 (LWP 14003)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 549758541856 (LWP 14003)]
main () at t.cpp:13
13              catch (...) {
(gdb) where
#0  main () at t.cpp:13