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STATUS_ACCESS_VIOLATION in egcs-1.1.1 (cygwin) compiled program

The following program crashes with STATUS_ACCESS_VIOLATION when
returning a class. Its compiled with egcs-2.91.60 in Cygnus b20.1. It
does not crash in a LINUX System, compiled with the same Version of the
egcs compiler.
If I'm a stupid, tell me.

gcc -v -o dump dump.cpp
Reading specs from
D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/specs

gcc version egcs-2.91.60 19981201 (egcs-1.1.1 release)
 D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/cpp.exe
-lang-c++ -v -iprefix
D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/
-undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -D__GNUC_MINOR__=91
-Di386 -D_WIN32 -DWINNT -D_X86_=1 -D__STDC__=1
-D__stdcall=__attribute__((__stdcall__))
-D__cdecl=__attribute__((__cdecl__)) -D__declspec(x)=__attribute__((x))
-D__i386__ -D_WIN32 -D__WINNT__ -D_X86_=1 -D__STDC__=1
-D__stdcall=__attribute__((__stdcall__))
-D__cdecl=__attribute__((__cdecl__)) -D__declspec(x)=__attribute__((x))
-D__i386 -D__WINNT -Asystem(winnt) -Acpu(i386) -Amachine(i386)
-D__EXCEPTIONS -remap -Asystem(unix) -Acpu(i386) -Amachine(i386) -Di386
-D__i386 -D__i386__ -Di586 -Dpentium -D__i586 -D__i586__ -D__pentium
-D__pentium__ -D__CYGWIN32__ -D__CYGWIN__ dump.cpp
C:\WINDOWS\TEMP/cctTgmB3.ii
GNU CPP version egcs-2.91.60 19981201 (egcs-1.1.1 release) (80386, BSD
syntax)
#include "..." search starts here:
#include <...> search starts here:
 D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/../../../../../include/g++

 D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/../../../../../include

 D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/../../../../i586-cygwin32/include

 D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/include

End of search list.
 D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/cc1plus.exe
C:\WINDOWS\TEMP/cctTgmB3.ii -quiet -dumpbase dump.cc -version -o
C:\WINDOWS\TEMP/ccvN2ZO6.s
GNU C++ version egcs-2.91.60 19981201 (egcs-1.1.1 release)
(i586-cygwin32) compiled by GNU C version egcs-2.91.60 19981201
(egcs-1.1.1 release).
 D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/../../../../i586-cygwin32/bin/as.exe
-o C:\WINDOWS\TEMP/ccno1tcm.o C:\WINDOWS\TEMP/ccvN2ZO6.s
 D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/collect2.exe
-o dump.exe
D:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/../../../../i586-cygwin32/lib/crt0.o
-LD:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60
-LD:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib
-LD:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/../../../../i586-cygwin32/lib
-LD:/CYGNUS/CYGWIN~1/H-I586~1/BIN/../lib/gcc-lib/i586-cygwin32/egcs-2.91.60/../../..
C:\WINDOWS\TEMP/ccno1tcm.o -lgcc -lcygwin -lkernel32 -ladvapi32
-lshell32 -lgcc
./dump
[main] E:\SOURCEN\DUMP_CYGNUS\DUMP.EXE 1104 (0) handle_exceptions:
Exception: STATUS_ACCESS_VIOLATION
[main] DUMP 1104 (0) handle_exceptions: Dumping stack trace to
DUMP.EXE.core

My program:

int  return1() {return 1;}
struct B {
  int i;
  B() {i=1;}
  ~B() {}
};
B returnB() {
  B erg;
  return erg;
};
void  test()  {
  for(int k=0;k<2;k++) {
    returnB();
    int d=return1()+return1();
  }
}
void main(void)
{
  test();
}

Every line seems to be important !

Thanks for the delightfull compiler and cygwin.

dump.cpp

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