[Bug c++/105634] [9/10/11/12/13 Regression] ICE: Floating point exception in maybe_warn_class_memaccess
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105634 --- Comment #3 from CVS Commits --- The trunk branch has been updated by Marek Polacek : https://gcc.gnu.org/g:dfe38b8d5dbfe3dd5209aece4ce2f7a6b303a2f9 commit r13-621-gdfe38b8d5dbfe3dd5209aece4ce2f7a6b303a2f9 Author: Marek Polacek Date: Tue May 17 15:13:58 2022 -0400 c++: fix SIGFPE with -Wclass-memaccess [PR105634] Here we crash because we attempt to % by 0. Thus fixed. While at it, I've moved the -Wclass-memaccess tests into warn/. I've checked that the # of expected passes is the same before/after the move. PR c++/105634 gcc/cp/ChangeLog: * call.cc (maybe_warn_class_memaccess): Avoid % by zero. gcc/testsuite/ChangeLog: * g++.dg/Wclass-memaccess-2.C: Moved to... * g++.dg/warn/Wclass-memaccess-2.C: ...here. * g++.dg/Wclass-memaccess-3.C: Moved to... * g++.dg/warn/Wclass-memaccess-3.C: ...here. * g++.dg/Wclass-memaccess-4.C: Moved to... * g++.dg/warn/Wclass-memaccess-4.C: ...here. * g++.dg/Wclass-memaccess-5.C: Moved to... * g++.dg/warn/Wclass-memaccess-5.C: ...here. * g++.dg/Wclass-memaccess-6.C: Moved to... * g++.dg/warn/Wclass-memaccess-6.C: ...here. * g++.dg/Wclass-memaccess.C: Moved to... * g++.dg/warn/Wclass-memaccess.C: ...here. * g++.dg/warn/Wclass-memaccess-7.C: New test.
[Bug c++/105634] [9/10/11/12/13 Regression] ICE: Floating point exception in maybe_warn_class_memaccess
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105634 Marek Polacek changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org --- Comment #2 from Marek Polacek --- Fix: --- a/gcc/cp/call.cc +++ b/gcc/cp/call.cc @@ -10329,6 +10329,8 @@ maybe_warn_class_memaccess (location_t loc, tree fndecl, /* Finally, warn on partial copies. */ unsigned HOST_WIDE_INT typesize = tree_to_uhwi (TYPE_SIZE_UNIT (desttype)); + if (typesize == 0) + break; if (unsigned HOST_WIDE_INT partial = tree_to_uhwi (sz) % typesize) warned = warning_at (loc, OPT_Wclass_memaccess, (typesize - partial > 1
[Bug c++/105634] [9/10/11/12/13 Regression] ICE: Floating point exception in maybe_warn_class_memaccess
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105634 Marek Polacek changed: What|Removed |Added Status|UNCONFIRMED |NEW Target Milestone|--- |9.5 CC||mpolacek at gcc dot gnu.org Summary|ICE: Floating point |[9/10/11/12/13 Regression] |exception in|ICE: Floating point |maybe_warn_class_memaccess |exception in ||maybe_warn_class_memaccess Priority|P3 |P5 Keywords||error-recovery Last reconfirmed||2022-05-17 Ever confirmed|0 |1 --- Comment #1 from Marek Polacek --- Started with r249234: commit c3684b7b86da9b6b01f6fb274227fc6401df053e Author: Martin Sebor Date: Fri Jun 16 03:48:59 2017 + PR c++/80560 - warn on undefined memory operations involving non-trivial types
