http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53560
Bug #: 53560 Summary: Internal compiler error with += and void function (invalid source) Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: g++...@oxyware.com void f() {} int main() { int i = 0; i += f(); } This is an invalid C++ program but it causes an internal compiler error (see below). g++ -v -save-temps -c <the-above> gives: Using built-in specs. COLLECT_GCC=/usr/local/bin/g++ Target: x86_64-unknown-linux-gnu Configured with: ./configure Thread model: posix gcc version 4.7.0 (GCC) COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/cc1plus -E -quiet -v -D_GNU_SOURCE argc.cpp -mtune=generic -march=x86-64 -fpch-preprocess -o argc.ii ignoring nonexistent directory "/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../x86_64-unknown-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0 /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/x86_64-unknown-linux-gnu /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/backward /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/include /usr/local/include /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/include-fixed /usr/include End of search list. COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/cc1plus -fpreprocessed argc.ii -quiet -dumpbase argc.cpp -mtune=generic -march=x86-64 -auxbase argc -version -o argc.s GNU C++ (GCC) version 4.7.0 (x86_64-unknown-linux-gnu) compiled by GNU C version 4.7.0, GMP version 4.3.1, MPFR version 2.4.2, MPC version 0.8.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C++ (GCC) version 4.7.0 (x86_64-unknown-linux-gnu) compiled by GNU C version 4.7.0, GMP version 4.3.1, MPFR version 2.4.2, MPC version 0.8.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 635960e7261d0cad01689b56d992ea9a argc.cpp: In function ‘int main()’: argc.cpp:6:11: internal compiler error: in build_target_expr_with_type, at cp/tree.c:587 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions.