[Bug c++/77658] New: internal compiler error: in assign_temp, at function.c:961

[naupacte at sfr dot fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77658

            Bug ID: 77658
           Summary: internal compiler error: in assign_temp, at
                    function.c:961
           Product: gcc
           Version: 6.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: naupacte at sfr dot fr
  Target Milestone: ---

//A very strange combination is needed to produce the ICE:
//Full program:

struct A
{
//    A();
    ~A(); // NEEDED to produce ICE
};

#ifdef FIRST_CASE
A a (int) { throw ""; return {};}
A b (int) { throw ""; return {};}

A c (int) { throw ""; return {};}
A d (int) { throw ""; return {};}
A e (int) { throw ""; return {};}

#else // second case

A a (int) { throw 1;}
A b (int) { throw 1;}

A c (int) { throw 1;}
A d (int) { throw 1;}
A e (int) { throw 1;}

#endif
//EOF

NB: THERE MUST be at least 5 such functions:
- returning type A
- and throwing same type
- having one (unique?) same argument type





MacBookPro$  /opt/local/bin/gcc-mp-6 -x c++ -c <program>.cpp  -O3
program.cpp: In function 'A a(int)':
program.cpp:16:3: internal compiler error: in assign_temp, at function.c:961
 A a (int) { throw 1;}
   ^

program.cpp:16:3: internal compiler error: Abort trap: 6
gcc-mp-6: internal compiler error: Abort trap: 6 (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://trac.macports.org/newticket> for instructions.


MacBookPro$ /opt/local/bin/gcc-mp-6 -v
Using built-in specs.
COLLECT_GCC=/opt/local/bin/gcc-mp-6
COLLECT_LTO_WRAPPER=/opt/local/libexec/gcc/x86_64-apple-darwin15/6.1.0/lto-wrapper
Target: x86_64-apple-darwin15
Configured with:
/opt/local/var/macports/build/_opt_mports_dports_lang_gcc6/gcc6/work/gcc-6.1.0/configure
--prefix=/opt/local --build=x86_64-apple-darwin15
--enable-languages=c,c++,objc,obj-c++,lto,fortran,java
--libdir=/opt/local/lib/gcc6 --includedir=/opt/local/include/gcc6
--infodir=/opt/local/share/info --mandir=/opt/local/share/man
--datarootdir=/opt/local/share/gcc-6 --with-local-prefix=/opt/local
--with-system-zlib --disable-nls --program-suffix=-mp-6
--with-gxx-include-dir=/opt/local/include/gcc6/c++/ --with-gmp=/opt/local
--with-mpfr=/opt/local --with-mpc=/opt/local --with-isl=/opt/local
--enable-stage1-checking --disable-multilib --enable-lto
--enable-libstdcxx-time --with-build-config=bootstrap-debug
--with-as=/opt/local/bin/as --with-ld=/opt/local/bin/ld
--with-ar=/opt/local/bin/ar --with-bugurl=https://trac.macports.org/newticket
--with-pkgversion='MacPorts gcc6 6.1.0_0'
Thread model: posix
gcc version 6.1.0 (MacPorts gcc6 6.1.0_0)