The following code causes an ICE in gcc-4.5.0. An error should be reported (as per n3092, 5.1.2/4) owing to the fact that the return statement is invalid - a brace-init-list is not an expression and hence the return type is void.
23:38:33 Paul bibbi...@jijou /cygdrive/d/CPPProjects/nano/gcc_bugs $cat _5_1_2_4.cpp int main() { auto x2 = []{ return { 1, 2 }; }; } 23:39:08 Paul bibbi...@jijou /cygdrive/d/CPPProjects/nano/gcc_bugs $i686-pc-cygwin-gcc-4.5.0 -Wall -save-temps -std=c++0x -c _5_1_2_4.cpp _5_1_2_4.cpp: In lambda function: _5_1_2_4.cpp:3:32: internal compiler error: in convert_like_real, at cp/call.c:4929 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. 23:43:24 Paul bibbi...@jijou /cygdrive/d/CPPProjects/nano/gcc_bugs $i686-pc-cygwin-gcc-4.5.0 -v Using built-in specs. COLLECT_GCC=i686-pc-cygwin-gcc-4.5.0 COLLECT_LTO_WRAPPER=/opt/gcc-4.5.0/libexec/gcc/i686-pc-cygwin/4.5.0/lto-wrapper.exe Target: i686-pc-cygwin Configured with: ./configure --prefix=/opt/gcc-4.5.0 --enable-bootstrap --enable-version-specific-runtime-libs --enable-static --enable-shared --enable-shared-libgcc --disable-__cxa_atexit --with-gnu-ld --with-gnu-as --with-dwarf2 --disable-sjlj-exceptions --enable-languages=c,c++ --disable-symvers --enable-libgomp --enable-libssp --enable-threads=posix --with-arch-i686 --with-tune=generic Thread model: posix gcc version 4.5.0 (GCC) 23:44:15 Paul bibbi...@jijou /cygdrive/d/CPPProjects/nano/gcc_bugs $cat _5_1_2_4.ii # 1 "_5_1_2_4.cpp" # 1 "<built-in>" # 1 "<command-line>" # 1 "_5_1_2_4.cpp" int main() { auto x2 = []{ return { 1, 2 }; }; } -- Summary: gcc-4.5.0 - ICE on invalid lambda return Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: paul dot bibbings at gmail dot com GCC host triplet: i686-pc-cygwin http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43875