[970929] Can't throw in constructor

[H.J. Lu]

> 
> Good news: Debian finally has a glibc 2.0.5c, so I can use
> egcs-970929:
> 
>  Reading specs from /usr/local/lib/gcc-lib/i486-pc-linux-gnu/egcs-2.90.11/specs
>  gcc version egcs-2.90.11 970929 (gcc2-970802 experimental)
> 
>  # This directory was configured as follows:
>  SRC/configure --host=i486-pc-linux-gnu --program-transform-name=s,^,s, \
>    --norecursion 
>  #  using "SRC/config/mt-linux"
> 
> Bad news:  My exception-in-constructor test case fails.  (It's compiled
> with "-g", no optimization, with "-frtti":
> 
> -----------------------------------------------------------------------
> #include <iostream.h>
> #include <sys/types.h>
> 
> 
> char x[100];
> class Noisy {
>   public:
>     Noisy() { throw "Aaaaah!"; }
> 
>     void * operator new (size_t)
> 	{ cout << "Noisy::new" << endl; return x; }
>     void operator delete (void *, size_t)
> 	{ cout << "Noisy::delete" << endl; }
> };
> 
> void
> foo()
> {
>     Noisy *p = 0;
>     try {
> 	p = new Noisy;
> 	delete p;
>     }
>     catch (...) {
> 	cout << "Can't be noisy" << endl;
>     }
> }
> 
> main()
> {
>     foo();
> }

I got

# gcc -O e.cc
# a.out
Noisy::new
Can't be noisy

under Linux with libc 5.4.39 and glibc 2.1.


H.J.