[Bug c++/34850] [4.3 Regression] Recursive BLOCK tree causes compilation to hang during diagnostics

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

------- Comment #2 from rguenth at gcc dot gnu dot org  2008-01-18 14:53 -------
The recursion is created by set_block_origin_self (), called from

#0  set_block_origin_self (stmt=0x2b4ce448cd80)
    at /space/rguenther/src/svn/trunk/gcc/integrate.c:105
#1  0x000000000098ca87 in set_decl_origin_self (decl=0x2b4ce4479680)
    at /space/rguenther/src/svn/trunk/gcc/integrate.c:154
#2  0x0000000000810f41 in gen_decl_die (decl=0x2b4ce4479680, 
    context_die=0x2b4ce445e0c0)
    at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:13873
#3  0x00000000008129d3 in dwarf2out_decl (decl=0x2b4ce4479680)
    at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:14214
#4  0x00000000008880c7 in rest_of_handle_final ()
    at /space/rguenther/src/svn/trunk/gcc/final.c:4152

while we still (after that), try to emit diagnostics via

#0  0x000000000056ae92 in cp_print_error_function (context=0x15c5a60, 
    diagnostic=0x7fffc70736b0)
    at /space/rguenther/src/svn/trunk/gcc/cp/error.c:2426
#1  0x000000000056a9f4 in cp_diagnostic_starter (context=0x15c5a60, 
    diagnostic=0x7fffc70736b0)
    at /space/rguenther/src/svn/trunk/gcc/cp/error.c:2364
#2  0x00000000007e2168 in diagnostic_report_diagnostic (context=0x15c5a60, 
    diagnostic=0x7fffc70736b0)
    at /space/rguenther/src/svn/trunk/gcc/diagnostic.c:421
#3  0x00000000007e25e4 in warning (opt=0, 
    gmsgid=0x112a8e8 "%Kcall to %qs declared with attribute warning: %s")
    at /space/rguenther/src/svn/trunk/gcc/diagnostic.c:511
#4  0x0000000000866d15 in expand_expr_real_1 (exp=0x2b4ce44e5230, target=0x0, 
    tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /space/rguenther/src/svn/trunk/gcc/expr.c:8043
#5  0x000000000085ff13 in expand_expr_real (exp=0x2b4ce44e5230, 
    target=0x2b4ce3a92400, tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /space/rguenther/src/svn/trunk/gcc/expr.c:7094
#6  0x0000000000a95a45 in expand_expr (exp=0x2b4ce44e5230, 
    target=0x2b4ce3a92400, mode=VOIDmode, modifier=EXPAND_NORMAL)
    at /space/rguenther/src/svn/trunk/gcc/expr.h:514
#7  0x0000000000a977db in expand_expr_stmt (exp=0x2b4ce44e5230)
    at /space/rguenther/src/svn/trunk/gcc/stmt.c:1361
#8  0x0000000000fd8e9a in expand_gimple_basic_block (bb=0x2b4ce44c8f00)
    at /space/rguenther/src/svn/trunk/gcc/cfgexpand.c:1609
#9  0x0000000000fda700 in tree_expand_cfg ()
    at /space/rguenther/src/svn/trunk/gcc/cfgexpand.c:1918

thus from expanding another function.

Bummer.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-01-18 14:53:38
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34850