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* [Bug c++/38795] New: [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates
@ 2009-01-10 16:54 reichelt at gcc dot gnu dot org
2009-01-10 16:54 ` [Bug c++/38795] " reichelt at gcc dot gnu dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: reichelt at gcc dot gnu dot org @ 2009-01-10 16:54 UTC (permalink / raw)
To: gcc-bugs
The following invalid code snippet is triggers an ICE since GCC 4.3.0:
========================================
template<typename... T> int foo(int i)
{
return *reinterpret_cast<T*>(i);
}
void bar(int i)
{
foo<int>(i);
}
========================================
bug.cc: In function 'int foo(int) [with T = int]':
bug.cc:8: instantiated from here
bug.cc:3: internal compiler error: tree check: expected record_type or
union_type or qual_union_type, have template_type_parm in lookup_conversions,
at cp/search.c:2459
Please submit a full bug report, [etc.]
It's a regression because the code crashes even without -std=gnu++0x.
--
Summary: [4.3/4.4 regression] ICE with reinterpret_cast and
variadic templates
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, monitored
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: reichelt at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38795
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug c++/38795] [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates 2009-01-10 16:54 [Bug c++/38795] New: [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates reichelt at gcc dot gnu dot org @ 2009-01-10 16:54 ` reichelt at gcc dot gnu dot org 2009-01-13 9:03 ` jakub at gcc dot gnu dot org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: reichelt at gcc dot gnu dot org @ 2009-01-10 16:54 UTC (permalink / raw) To: gcc-bugs -- reichelt at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.3.3 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38795 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/38795] [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates 2009-01-10 16:54 [Bug c++/38795] New: [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates reichelt at gcc dot gnu dot org 2009-01-10 16:54 ` [Bug c++/38795] " reichelt at gcc dot gnu dot org @ 2009-01-13 9:03 ` jakub at gcc dot gnu dot org 2009-01-13 18:12 ` jakub at gcc dot gnu dot org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu dot org @ 2009-01-13 9:03 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from jakub at gcc dot gnu dot org 2009-01-13 09:03 ------- Seems cp_walk_subtrees doesn't handle REINTERPRET_CAST_EXPR, so check_for_bare_parameter_packs doesn't detect them. Just handling this the same as CAST_EXPR seems to fix this testcase. -- jakub at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |jakub at gcc dot gnu dot org |dot org | Status|UNCONFIRMED |ASSIGNED Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2009-01-13 09:03:19 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38795 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/38795] [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates 2009-01-10 16:54 [Bug c++/38795] New: [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates reichelt at gcc dot gnu dot org 2009-01-10 16:54 ` [Bug c++/38795] " reichelt at gcc dot gnu dot org 2009-01-13 9:03 ` jakub at gcc dot gnu dot org @ 2009-01-13 18:12 ` jakub at gcc dot gnu dot org 2009-01-13 18:12 ` [Bug c++/38795] [4.3 " jakub at gcc dot gnu dot org 2009-01-15 16:13 ` rguenth at gcc dot gnu dot org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu dot org @ 2009-01-13 18:12 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from jakub at gcc dot gnu dot org 2009-01-13 18:12 ------- Subject: Bug 38795 Author: jakub Date: Tue Jan 13 18:11:50 2009 New Revision: 143351 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=143351 Log: PR c++/38795 * tree.c (cp_walk_subtrees): Handle REINTERPRET_CAST_EXPR, STATIC_CAST_EXPR, CONST_CAST_EXPR and DYNAMIC_CAST_EXPR the same as CAST_EXPR. * g++.dg/cpp0x/pr38795.C: New test. Added: trunk/gcc/testsuite/g++.dg/cpp0x/pr38795.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/tree.c trunk/gcc/testsuite/ChangeLog -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38795 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/38795] [4.3 regression] ICE with reinterpret_cast and variadic templates 2009-01-10 16:54 [Bug c++/38795] New: [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates reichelt at gcc dot gnu dot org ` (2 preceding siblings ...) 2009-01-13 18:12 ` jakub at gcc dot gnu dot org @ 2009-01-13 18:12 ` jakub at gcc dot gnu dot org 2009-01-15 16:13 ` rguenth at gcc dot gnu dot org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu dot org @ 2009-01-13 18:12 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from jakub at gcc dot gnu dot org 2009-01-13 18:12 ------- Fixed on the trunk so far. -- jakub at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[4.3/4.4 regression] ICE |[4.3 regression] ICE with |with reinterpret_cast and |reinterpret_cast and |variadic templates |variadic templates http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38795 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/38795] [4.3 regression] ICE with reinterpret_cast and variadic templates 2009-01-10 16:54 [Bug c++/38795] New: [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates reichelt at gcc dot gnu dot org ` (3 preceding siblings ...) 2009-01-13 18:12 ` [Bug c++/38795] [4.3 " jakub at gcc dot gnu dot org @ 2009-01-15 16:13 ` rguenth at gcc dot gnu dot org 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu dot org @ 2009-01-15 16:13 UTC (permalink / raw) To: gcc-bugs ------- Comment #4 from rguenth at gcc dot gnu dot org 2009-01-15 16:12 ------- Fixed for GCC 4.4. Works for me on the branch with checking disabled. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Keywords| |ice-checking Known to fail| |4.3.2 Known to work| |4.4.0 Resolution| |FIXED Target Milestone|4.3.3 |4.4.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38795 ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-01-15 16:13 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2009-01-10 16:54 [Bug c++/38795] New: [4.3/4.4 regression] ICE with reinterpret_cast and variadic templates reichelt at gcc dot gnu dot org 2009-01-10 16:54 ` [Bug c++/38795] " reichelt at gcc dot gnu dot org 2009-01-13 9:03 ` jakub at gcc dot gnu dot org 2009-01-13 18:12 ` jakub at gcc dot gnu dot org 2009-01-13 18:12 ` [Bug c++/38795] [4.3 " jakub at gcc dot gnu dot org 2009-01-15 16:13 ` rguenth at gcc dot gnu dot org
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