internal compiler error: in tsubst_decl

[Jonathan Poelen]

Description: Ubuntu Wily Werewolf (development branch)
Release: 15.10

$ /usr/lib/gcc-snapshot/bin/g++ -std=c++14 -c -v seg.cpp -save-temps
Using built-in specs.
COLLECT_GCC=/usr/lib/gcc-snapshot/bin/g++
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 20150825-0ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs --enable-languages=c,ada,c++,java,go,fortran,objc,obj-c++ --prefix=/usr/lib/gcc-snapshot --enable-shared --enable-linker-build-id --disable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-snap-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-snap-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-snap-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=yes --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 6.0.0 20150825 (experimental) [trunk revision 227171] (Ubuntu 20150825-0ubuntu1)
COLLECT_GCC_OPTIONS='-std=c++14' '-c' '-v' '-save-temps' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/6.0.0/cc1plus -E -quiet -v -imultiarch x86_64-linux-gnu -D_GNU_SOURCE seg.cpp -mtune=generic -march=x86-64 -std=c++14 -fpch-preprocess -o seg.ii
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/6.0.0/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/6.0.0/../../../../include/c++/6.0.0
 /usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/6.0.0/../../../../include/c++/6.0.0/x86_64-linux-gnu
 /usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/6.0.0/../../../../include/c++/6.0.0/backward
 /usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/6.0.0/include
 /usr/local/include
 /usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/6.0.0/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-std=c++14' '-c' '-v' '-save-temps' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/6.0.0/cc1plus -fpreprocessed seg.ii -quiet -dumpbase seg.cpp -mtune=generic -march=x86-64 -auxbase seg -std=c++14 -version -o seg.s
GNU C++14 (Ubuntu 20150825-0ubuntu1) version 6.0.0 20150825 (experimental) [trunk revision 227171] (x86_64-linux-gnu)
        compiled by GNU C version 6.0.0 20150825 (experimental) [trunk revision 227171], GMP version 6.0.0, MPFR version 3.1.3, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++14 (Ubuntu 20150825-0ubuntu1) version 6.0.0 20150825 (experimental) [trunk revision 227171] (x86_64-linux-gnu)
        compiled by GNU C version 6.0.0 20150825 (experimental) [trunk revision 227171], GMP version 6.0.0, MPFR version 3.1.3, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 46baca5a0447f063eeea8210a0fae66e
seg.cpp: In instantiation of 'main()::<lambda(auto:1)> [with auto:1 = int]':
seg.cpp:6:23: required from here
seg.cpp:1:5: internal compiler error: in tsubst_decl, at cp/pt.c:11302
 int main() {
     ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.

# 1 "seg.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "seg.cpp"
int main() {
  unsigned const nsz = 0;
  auto repeat_conditional = [&](auto) {
    auto new_sz = nsz;
  };
  repeat_conditional(1);
}

Same with version 5.2 with more trace.

$ g++-5 -std=c++14 -c -v seg.cpp -save-temps
Using built-in specs.
COLLECT_GCC=g++-5
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.2.1-15ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.2.1 20150808 (Ubuntu 5.2.1-15ubuntu2)
COLLECT_GCC_OPTIONS='-std=c++14' '-c' '-v' '-save-temps' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -E -quiet -v -imultiarch x86_64-linux-gnu -D_GNU_SOURCE seg.cpp -mtune=generic -march=x86-64 -std=c++14 -fpch-preprocess -fstack-protector-strong -Wformat -Wformat-security -o seg.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/5"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/5
 /usr/include/x86_64-linux-gnu/c++/5
 /usr/include/c++/5/backward
 /usr/lib/gcc/x86_64-linux-gnu/5/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-std=c++14' '-c' '-v' '-save-temps' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -fpreprocessed seg.ii -quiet -dumpbase seg.cpp -mtune=generic -march=x86-64 -auxbase seg -std=c++14 -version -fstack-protector-strong -Wformat -Wformat-security -o seg.s
GNU C++14 (Ubuntu 5.2.1-15ubuntu2) version 5.2.1 20150808 (x86_64-linux-gnu)
        compiled by GNU C version 5.2.1 20150808, GMP version 6.0.0, MPFR version 3.1.3, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 5.2.1-15ubuntu2) version 5.2.1 20150808 (x86_64-linux-gnu)
        compiled by GNU C version 5.2.1 20150808, GMP version 6.0.0, MPFR version 3.1.3, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 6c22443aaafcb4e084c64ca78cf9db0d
seg.cpp: In instantiation of ‘main()::<lambda(auto:1)> [with auto:1 = int]’:
seg.cpp:6:23: required from here
seg.cpp:1:5: internal compiler error: in tsubst_decl, at cp/pt.c:10853
 int main() {
     ^
0x634d4c tsubst_decl
        ../../src/gcc/cp/pt.c:10853
0x627104 tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../src/gcc/cp/pt.c:11955
0x632c22 tsubst_copy
        ../../src/gcc/cp/pt.c:13114
0x623be8 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool)
        ../../src/gcc/cp/pt.c:15739
0x62c1e2 tsubst_expr
        ../../src/gcc/cp/pt.c:14551
0x62cf95 tsubst_init
        ../../src/gcc/cp/pt.c:12946
0x62c9f6 tsubst_expr
        ../../src/gcc/cp/pt.c:14055
0x62c12c tsubst_expr
        ../../src/gcc/cp/pt.c:14134
0x62c12c tsubst_expr
        ../../src/gcc/cp/pt.c:14134
0x62ae97 instantiate_decl(tree_node*, int, bool)
        ../../src/gcc/cp/pt.c:20579
0x65a172 mark_used(tree_node*, int)
        ../../src/gcc/cp/decl2.c:5032
0x5f99c0 build_over_call
        ../../src/gcc/cp/call.c:7501
0x5fc0f1 build_op_call_1
        ../../src/gcc/cp/call.c:4345
0x5fc0f1 build_op_call(tree_node*, vec<tree_node*, va_gc, vl_embed>**, int)
        ../../src/gcc/cp/call.c:4368
0x6c3878 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool, bool, int)
        ../../src/gcc/cp/semantics.c:2426
0x677ad1 cp_parser_postfix_expression
        ../../src/gcc/cp/parser.c:6376
0x679f69 cp_parser_unary_expression
        ../../src/gcc/cp/parser.c:7439
0x67aae7 cp_parser_binary_expression
        ../../src/gcc/cp/parser.c:8173
0x67b0dd cp_parser_assignment_expression
        ../../src/gcc/cp/parser.c:8431
0x67d451 cp_parser_expression
        ../../src/gcc/cp/parser.c:8585
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.

Ok for 4.9.3 (Ubuntu 4.9.3-2ubuntu1).

[Launchpad Janitor (janitor)]

This bug was fixed in the package gcc-5 - 5.2.1-17ubuntu1

---------------
gcc-5 (5.2.1-17ubuntu1) wily; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.

 -- Matthias Klose <email address hidden> Fri, 11 Sep 2015 03:24:48 +0200