[Bug sanitizer/66343] "Error: .Lubsan_type3 already defined" with UBSan and precompiled headers

[marc.mutz at kdab dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66343

--- Comment #12 from Marc Mutz <marc.mutz at kdab dot com> ---
Created attachment 39768
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39768&action=edit
Preprocessed source for PCH

Command line for PCH file:

  g++ -pipe -g -O3 -std=c++1z \
    -I/usr/include/glib-2.0 \
    -I/usr/lib/x86_64-linux-gnu/glib-2.0/include \
    -pthread \
    -fvisibility=hidden \
    -fvisibility-inlines-hidden \
    -fsanitize=address \
    -fsanitize=undefined \
    -fno-omit-frame-pointer \
    -Wall \
    -W \
    -Wvla \
    -Wdate-time \
    -Wshift-overflow=2 \
    -Wduplicated-cond \
    -Werror \
    -Wno-error=cpp \
    -Wno-error=deprecated-declarations \
    -Wno-error=strict-overflow \
    -D_REENTRANT \
    -fPIC \
    -DQT_NO_USING_NAMESPACE \
    -DQT_NO_FOREACH \
    -DELF_INTERPRETER=\"/lib64/ld-linux-x86-64.so.2\" \
    -DQT_USE_ICU \
    -DQT_HAVE_POLL \
    -DQT_HAVE_PPOLL \
    -DQT_BUILD_CORE_LIB \
    -DQT_BUILDING_QT \
    -DQT_NO_CAST_TO_ASCII \
    -DQT_ASCII_CAST_WARNINGS \
    -DQT_MOC_COMPAT \
    -DQT_USE_QSTRINGBUILDER \
    -DQT_DEPRECATED_WARNINGS \
    -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 \
    -D_LARGEFILE64_SOURCE \
    -D_LARGEFILE_SOURCE \
    -DQT_NO_DEBUG \
    -I/home/marc/Qt/qt5/qtbase/src/corelib \
    -I. \
    -Iglobal \
    -I/home/marc/Qt/qt5/qtbase/src/3rdparty/harfbuzz/src \
    -I/home/marc/Qt/qt5/qtbase/src/3rdparty/md5 \
    -I/home/marc/Qt/qt5/qtbase/src/3rdparty/md4 \
    -I/home/marc/Qt/qt5/qtbase/src/3rdparty/sha3 \
    -I/home/marc/Qt/qt5/qtbase/src/3rdparty/forkfd \
    -I../../include \
    -I../../include/QtCore \
    -I../../include/QtCore/5.8.0 \
    -I../../include/QtCore/5.8.0/QtCore \
    -I.moc \
    -I/home/marc/Qt/qt5/qtbase/mkspecs/linux-g++ \
    -x c++-header \
    -c /home/marc/Qt/qt5/qtbase/src/corelib/global/qt_pch.h \
    -o .pch/Qt5Core.gch/c++

  g++ -v
   Using built-in specs.
   COLLECT_GCC=g++
  
COLLECT_LTO_WRAPPER=/d/gcc/trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
   Target: x86_64-pc-linux-gnu
   Configured with: ../gcc/configure --prefix=/d/gcc/trunk
--enable-checking=release --enable-languges=c,c++,fortran,lto,objc,obj-c++
   Thread model: posix
   gcc version 7.0.0 20161005 (experimental) (GCC) 

  git log -10 --oneline
   c7b01e7         PR sanitizer/77823      * c-ubsan.c
(ubsan_instrument_shift): Return NULL_TREE if type0         is not integral.
   d204444 Fix pr69941.c test failure for avr
   ea55eab 2016-10-05  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
   9ce1157 PR bootstrap/77819 - undefined reference to
gnu_libc_printf_pointer_format with uClibc
   5c176eb         * c-common.c (c_common_reswords): Update comment for C++11.
   4ef2832 [fold-const] Fix native_encode_real for HFmode constants
   59deb1a 70564 fix newly-added tests for not_fn
   c375ef0 libcpp/ChangeLog:
   77a1a89 Move all existing strchr and strrchr folding from builtins.c to
gimple-fold.c.
   ad69f5a PR 70101 fix allocator-extended ctors for std::priority_queue