[Bug c++/22466] New: ICE on classes in template functions which attempt closure

["albertm at uphs dot upenn dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

Error message: 
 
<prompt>:g++ -c bug02.cc 
bug02.cc: In constructor ?do_something(const T (*)[M])::helper_t::helper_t() 
[with T = double, int M = 3]?: 
bug02.cc:10:   instantiated from ?void do_something(const T (*)[M]) [with T = 
double, int M = 3]? 
bug02.cc:16:   instantiated from here 
bug02.cc:6: internal compiler error: in tsubst_copy, at cp/pt.c:7632 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
The above is with gcc-4.0.0, but the identical happends with  
gcc-3.4.3 and  4.1.0 20050702 (experimental).  The code follows: 
 
--------------------------------bug02.cc----------------------------- 
template<typename T, int M> 
void do_something( const T A[M][M]) 
{ 
        struct helper_t{ 
                helper_t():B(new double [M*M]){  
                        B[0] = A[0][0]; 
                } 
                ~helper_t(){ delete[] B; } 
                double * B; 
        } helper; 
} 
 
void sub1() 
{ 
        double A[3][3]; 
        do_something(A); 
} 
-----------------------------end bug02.cc----------------------------- 
 
As always, thank you.  You folks do excellent work. 
 
Sincerely, 
 Mike Albert

-- 
           Summary: ICE on classes in template functions which attempt
                    closure
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: albertm at uphs dot upenn dot edu
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: x86_64-unknown-linux-gnu (AMD)


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22466