https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79937
Bug ID: 79937 Summary: ICE in replace_placeholders_r Product: gcc Version: 7.0.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: g...@arne-mertz.de Target Milestone: --- The following code snippet leads to an internal compiler error in GCC 5.3 through 7.0.1: (see also https://godbolt.org/g/yFPEfx) ## Code struct C{}; struct X { unsigned i; unsigned n = i; }; C bar(X) { return {}; } void foo() { C c = bar(X{1}); //ICE } ## Error message: <source>: In function 'void foo()': <source>:14:19: internal compiler error: in replace_placeholders_r, at cp/tree.c:2524 C c = bar(X{1}); ^ mmap: Cannot allocate memory Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Compiler exited with result code 1 ## Version information (-v output): ### GCC 7.0.1: Target: x86_64-linux-gnu Configured with: ../gcc-trunk-20170306/configure --prefix /root/staging --build=x86_64-linux-gnu --disable-multilibs --disable-bootstrap --enable-clocale=gnu --enable-languages=c,c++ --enable-ld=yes --enable-gold=yes --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-linker-build-id --enable-lto --enable-plugins --enable-threads=posix --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-pkgversion=GCC-Explorer-Build Thread model: posix gcc version 7.0.1 20170306 (experimental) (GCC-Explorer-Build) ### GCC 5.3.0 Using built-in specs. COLLECT_GCC=/opt/compiler-explorer/gcc-5.3.0/bin/g++ Target: x86_64-linux-gnu Configured with: ../gcc-5.3.0/configure --prefix /root/staging --build=x86_64-linux-gnu --disable-multilibs --enable-clocale=gnu --enable-languages=c,c++ --enable-ld=yes --enable-gold=yes --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-linker-build-id --enable-lto --enable-plugins --enable-threads=posix --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-pkgversion=GCC-Explorer-Build Thread model: posix gcc version 5.3.0 (GCC-Explorer-Build) COLLECT_GCC_OPTIONS='-g' '-o' '/tmp/compiler-explorer-compiler11727-6627-1ps4xeb.oclq5mi/output.s' '-masm=intel' '-S' '-std=c++14' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /opt/compiler-explorer/gcc-5.3.0/bin/../libexec/gcc/x86_64-linux-gnu/5.3.0/cc1plus -quiet -v -imultiarch x86_64-linux-gnu -iprefix /opt/compiler-explorer/gcc-5.3.0/bin/../lib/gcc/x86_64-linux-gnu/5.3.0/ -D_GNU_SOURCE <source> -quiet -dumpbase example.cpp -masm=intel -mtune=generic -march=x86-64 -auxbase-strip /tmp/compiler-explorer-compiler11727-6627-1ps4xeb.oclq5mi/output.s -g -std=c++14 -version -o /tmp/compiler-explorer-compiler11727-6627-1ps4xeb.oclq5mi/output.s GNU C++14 (GCC-Explorer-Build) version 5.3.0 (x86_64-linux-gnu) compiled by GNU C version 5.3.0, GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072