https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83924
Bug ID: 83924
Summary: ICE: Error reporting routines re-entered with
-Wduplicated-branches
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: szotsaki at gmail dot com
Target Milestone: ---
Example code:
class GenVectorS {};
template<int N>
using VectorS = GenVectorS;
template<int n, int m>
void runB(const VectorS<(n > m ? n : m)>)
{}
void runA() {
runB<1, 1>(VectorS<1>{});
}
Command line:
./g++.exe -Wduplicated-branches code.cpp
Error message:
Internal compiler error: Error reporting routines re-entered.
libbacktrace could not find executable to open
Additional thoughts:
- No error without -Wduplicated-branches.
- No error when <1, 1> is not identical (like <1, 0>).
- No error when you leave out the "using" statement and replace the code to use
a templated version "GenVectorS" everywhere.
Version:
Using built-in specs.
COLLECT_GCC=C:\MinGW\mingw-w64\x86_64-7.1.0-posix-seh-rt_v5-rev2\mingw64\bin\g++.exe
COLLECT_LTO_WRAPPER=C:/MinGW/mingw-w64/x86_64-7.1.0-posix-seh-rt_v5-rev2/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/7.1.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../../../src/gcc-7.1.0/configure --host=x86_64-w64-mingw32
--build=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --prefix=/mingw64
--with-sysroot=/c/mingw710/x86_64-710-posix-seh-rt_v5-rev2/mingw64
--enable-shared --enable-static --disable-multilib
--enable-languages=c,c++,fortran,lto --enable-libstdcxx-time=yes
--enable-threads=posix --enable-libgomp --enable-libatomic --enable-lto
--enable-graphite --enable-checking=release --enable-fully-dynamic-string
--enable-version-specific-runtime-libs --enable-libstdcxx-filesystem-ts=yes
--disable-libstdcxx-pch --disable-libstdcxx-debug --enable-bootstrap
--disable-rpath --disable-win32-registry --disable-nls --disable-werror
--disable-symvers --with-gnu-as --with-gnu-ld --with-arch=nocona
--with-tune=core2 --with-libiconv --with-system-zlib
--with-gmp=/c/mingw710/prerequisites/x86_64-w64-mingw32-static
--with-mpfr=/c/mingw710/prerequisites/x86_64-w64-mingw32-static
--with-mpc=/c/mingw710/prerequisites/x86_64-w64-mingw32-static
--with-isl=/c/mingw710/prerequisites/x86_64-w64-mingw32-static
--with-pkgversion='x86_64-posix-seh-rev2, Built by MinGW-W64 project'
--with-bugurl=https://sourceforge.net/projects/mingw-w64 CFLAGS='-O2 -pipe
-fno-ident -I/c/mingw710/x86_64-710-posix-seh-rt_v5-rev2/mingw64/opt/include
-I/c/mingw710/prerequisites/x86_64-zlib-static/include
-I/c/mingw710/prerequisites/x86_64-w64-mingw32-static/include' CXXFLAGS='-O2
-pipe -fno-ident
-I/c/mingw710/x86_64-710-posix-seh-rt_v5-rev2/mingw64/opt/include
-I/c/mingw710/prerequisites/x86_64-zlib-static/include
-I/c/mingw710/prerequisites/x86_64-w64-mingw32-static/include' CPPFLAGS='
-I/c/mingw710/x86_64-710-posix-seh-rt_v5-rev2/mingw64/opt/include
-I/c/mingw710/prerequisites/x86_64-zlib-static/include
-I/c/mingw710/prerequisites/x86_64-w64-mingw32-static/include' LDFLAGS='-pipe
-fno-ident -L/c/mingw710/x86_64-710-posix-seh-rt_v5-rev2/mingw64/opt/lib
-L/c/mingw710/prerequisites/x86_64-zlib-static/lib
-L/c/mingw710/prerequisites/x86_64-w64-mingw32-static/lib '
Thread model: posix
gcc version 7.1.0 (x86_64-posix-seh-rev2, Built by MinGW-W64 project)
