c++/2690: complex<double> segfault with -g and -O

Sun Apr 29 13:56:00 GMT 2001

>Number:         2690
>Category:       c++
>Synopsis:       complex<double> segfault with -g and -O
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Apr 29 13:56:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     khan@nanotech.wisc.edu
>Release:        gcc mainline and 3.0 branch
>Organization:
>Environment:
i686-pc-linux-gnu
>Description:
When compiling with both -g and -O2 (and -O in some cases),
the following code will crash the compiler (both mainline
and 3.0 branch, CVS updated 2001-04-29):

#include <complex>
struct
foo
{
  foo(std::complex<double>);
};

foo::foo(std::complex<double> in)
{
  std::complex<double> tmp;
  tmp = in;
}

Note that defining foo::foo(std::complex<double>) inline
will not crash the compiler.

Preprocessed file attached.

$ gcc -v
Reading specs from /homes/khan/local/gcc-3.0/lib/gcc-lib/i686-pc-linux-gnu/3.0/specs
Configured with: ../../gcc3-cvs/configure --enable-shared --enable-threads --enable-languages=c++,f77 --prefix=/homes/khan/local/gcc-3.0 --with-system-zlib -v
Thread model: posix
gcc version 3.0 20010428 (prerelease)

The backtrace shows the following:

$ gdb cc1plus
(gdb) run -fpreprocessed xx.ii -quiet -dumpbase xx.cc -g -O -version -o xx.s
Starting program: /homes/khan/src/gnu/BUILD/gcc-cvs/gcc/cc1plus -fpreprocessed xx.ii -quiet -dumpbase xx.cc -g -O -version -o xx.s
Breakpoint 1 at 0x400411d2: file exit.c, line 40.
Breakpoint 3 at 0x40040008: file ../sysdeps/generic/abort.c, line 55.
GNU CPP version 3.1 20010428 (experimental) (cpplib) (i386 Linux/ELF)
GNU C++ version 3.1 20010428 (experimental) (i686-pc-linux-gnu)
        compiled by GNU C version 3.1 20010428 (experimental).

Program received signal SIGSEGV, Segmentation fault.
dbxout_type (type=0x0, full=0, show_arg_types=0)
    at ../../../gcc-cvs/gcc/dbxout.c:1022
1022      if (TREE_CODE (type) == VECTOR_TYPE)
(gdb) bt
#0  dbxout_type (type=0x0, full=0, show_arg_types=0)
    at ../../../gcc-cvs/gcc/dbxout.c:1022
#1  0x83311c8 in dbxout_symbol_location (decl=0x4040b548, type=0x0,
    suffix=0x842387c "$real", home=0x403e4920)
    at ../../../gcc-cvs/gcc/dbxout.c:2211
#2  0x8331237 in dbxout_symbol_location (decl=0x4040b548, type=0x4039a958,
    suffix=0x0, home=0x403e4940) at ../../../gcc-cvs/gcc/dbxout.c:2183
#3  0x8332a75 in dbxout_reg_parms (parms=0x4040b4e0)
    at ../../../gcc-cvs/gcc/dbxout.c:2591
#4  0x8332dab in dbxout_block (block=0x4040d160, depth=0, args=0x4040b4e0)
    at ../../../gcc-cvs/gcc/dbxout.c:2686
#5  0x8333228 in dbxout_function (decl=0x4040b478)
    at ../../../gcc-cvs/gcc/dbxout.c:2802
#6  0x82df58c in rest_of_compilation (decl=0x4040b478)
    at ../../../gcc-cvs/gcc/toplev.c:3754
#7  0x8117a1f in genrtl_finish_function (fn=0x4040b478)
    at ../../../gcc-cvs/gcc/cp/semantics.c:2689
#8  0x8117021 in expand_body (fn=0x4040b478)
    at ../../../gcc-cvs/gcc/cp/semantics.c:2475
#9  0x8126982 in maybe_clone_body (fn=0x40407958)
    at ../../../gcc-cvs/gcc/cp/optimize.c:1164
#10 0x8116e93 in expand_body (fn=0x40407958)
    at ../../../gcc-cvs/gcc/cp/semantics.c:2396
#11 0x80d6c93 in yyparse_1 () at /usr/lib/bison.simple:765
#12 0x82dd638 in compile_file (name=0xbffff88b "xx.ii")
    at ../../../gcc-cvs/gcc/toplev.c:2324
#13 0x82e1f6b in toplev_main (argc=11, argv=0xbffff6d4)
    at ../../../gcc-cvs/gcc/toplev.c:4936
#14 0x400389cb in __libc_start_main (main=0x8147150 <main>, argc=11,
    argv=0xbffff6d4, init=0x80491a4 <_init>, fini=0x838196c <_fini>,
    rtld_fini=0x4000aea0 <_dl_fini>, stack_end=0xbffff6cc)
    at ../sysdeps/generic/libc-start.c:92
(gdb)

>How-To-Repeat:
Compile with -g and -O[123456]
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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