[Bug c++/79652] [5/6/7 Regression] ICE on invalid c++ code in warn_extern_redeclared_static in cp/decl.c:1231

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79652

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
pushdecl_maybe_friend_1 with x == t does:
1035              if (!(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)
1036                    && t != NULL_TREE)
1037                  && (TREE_CODE (x) == TYPE_DECL
1038                      || VAR_P (x)
1039                      || TREE_CODE (x) == NAMESPACE_DECL
1040                      || TREE_CODE (x) == CONST_DECL
1041                      || TREE_CODE (x) == TEMPLATE_DECL))
1042                SET_IDENTIFIER_NAMESPACE_VALUE (name, x);
and in that SET_IDENTIFIER_NAMESPACE_VALUE ggc_frees x:
#1  0x0000000000b22925 in ggc_free (p=0x7ffff7ff5f30) at
../../gcc/ggc-page.c:1612
#2  0x00000000007a34b6 in duplicate_decls (newdecl=<error reading variable:
Cannot access memory at address 0x65766f6d5f646e61>, 
    olddecl=<var_decl 0x7ffff7ff5ea0 x>, newdecl_is_friend=false) at
../../gcc/cp/decl.c:2776
#3  0x0000000000a1d234 in supplement_binding_1 (binding=0x7fffefc4f0a0, 
    decl=<error reading variable: Cannot access memory at address
0x65766f6d5f646e61>) at ../../gcc/cp/name-lookup.c:571
#4  0x0000000000a1d65d in supplement_binding (binding=0x7fffefc4f0a0, 
    decl=<error reading variable: Cannot access memory at address
0x65766f6d5f646e61>) at ../../gcc/cp/name-lookup.c:626
#5  0x0000000000a29546 in set_namespace_binding_1 (name=<identifier_node
0x7fffefc499c0 x>, scope=<namespace_decl 0x7fffefc4a260>, 
    val=<error reading variable: Cannot access memory at address
0x65766f6d5f646e61>) at ../../gcc/cp/name-lookup.c:3533
#6  0x0000000000a29581 in set_namespace_binding (name=<identifier_node
0x7fffefc499c0 x>, scope=<namespace_decl 0x7fffefc4a260>, 
    val=<error reading variable: Cannot access memory at address
0x65766f6d5f646e61>) at ../../gcc/cp/name-lookup.c:3542
#7  0x0000000000a20256 in pushdecl_maybe_friend_1 (x=<error reading variable:
Cannot access memory at address 0x65766f6d5f646e61>, 
    is_friend=false) at ../../gcc/cp/name-lookup.c:1042
#8  0x0000000000a21dee in pushdecl_maybe_friend (x=<error reading variable:
Cannot access memory at address 0x65766f6d5f646e61>, is_friend=false)
    at ../../gcc/cp/name-lookup.c:1352
#9  0x0000000000a21e25 in pushdecl (x=<error reading variable: Cannot access
memory at address 0x65766f6d5f646e61>)
    at ../../gcc/cp/name-lookup.c:1362
#10 0x0000000000a22033 in maybe_push_decl (decl=<error reading variable: Cannot
access memory at address 0x65766f6d5f646e61>)
    at ../../gcc/cp/name-lookup.c:1391