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Bug#726794: marked as done (simple program compiled with gccgo segfaults)

Your message dated Thu, 17 Jul 2014 21:57:20 +0200
with message-id <53C82AA0.606@debian.org>
and subject line Re: simple program compiled with gccgo segfaults
has caused the Debian Bug report #726794,
regarding simple program compiled with gccgo segfaults
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
726794: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=726794
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: gccgo
Version: 4:4.8.1-3
Severity: important

I wanted to compile a program using gccgo to see how much faster it is.
However, the program segfaults. A minimum example that segfaults is
this:

    package main
    
    import (
        "flag"
        "fmt"
        "log"
        "os"
        "strings"
    )
    
    var aflag = flag.String("a", "b", "c")
    
    func verifyExtract(filename string) {
        u, err2 := os.Create("/tmp/ex")
        if err2 != nil {
            log.Fatal(err2)
        }
        fmt.Printf("%v\n", u)
    
        strings.HasSuffix(filename, ".bz2")
        log.Printf("bz2\n")
        strings.HasSuffix(filename, ".gzip")
        log.Printf("gz\n")
    }
    
    func main() {
        fmt.Println("This example compiles but segfaults")
        b := []string{
            "/tmp/bench/audacity_2.0.4.orig.tar.xz",
            "/tmp/bench/ardour3_3.4~dfsg.orig.tar.xz",
            "/tmp/bench/anjuta_3.8.4.orig.tar.xz",
            "/tmp/bench/apache2_2.4.6.orig.tar.bz2",
            "/tmp/bench/afterstep_2.2.12.orig.tar.bz2",
            "/tmp/bench/abtransfers_0.0.4.1.orig.tar.bz2",
            "/tmp/bench/aces3_3.0.6.orig.tar.gz",
            "/tmp/bench/9base_6.orig.tar.gz",
            "/tmp/bench/3depict_0.0.13.orig.tar.gz",
        }
    
        for _, f := range b {
            fmt.Printf("f = %v\n", f)
            verifyExtract(f)
        }
    }

$ go build 
$ ./helloworld.O 
This example compiles but segfaults
f = /tmp/bench/audacity_2.0.4.orig.tar.xz
&{0xc2000662a0}
2013/10/19 12:11:05 bz2
2013/10/19 12:11:05 gz
f = /tmp/bench/ardour3_3.4~dfsg.orig.tar.xz
&{0xc200066480}
2013/10/19 12:11:05 bz2
2013/10/19 12:11:05 gz
f = /tmp/bench/anjuta_3.8.4.orig.tar.xz
&{0xc2000664b0}
2013/10/19 12:11:05 bz2
2013/10/19 12:11:05 gz
f = /tmp/bench/apache2_2.4.6.orig.tar.bz2
&{0xc2000664e0}
2013/10/19 12:11:05 bz2
2013/10/19 12:11:05 gz
f = /tmp/bench/afterstep_2.2.12.orig.tar.bz2
&{0xc200066510}
2013/10/19 12:11:05 bz2
2013/10/19 12:11:05 gz
f = /tmp/bench/abtransfers_0.0.4.1.orig.tar.bz2
&{0xc200066540}
2013/10/19 12:11:05 bz2
2013/10/19 12:11:05 gz
f = /tmp/bench/aces3_3.0.6.orig.tar.gz
&{0xc200066570}
2013/10/19 12:11:05 bz2
2013/10/19 12:11:05 gz
f = /tmp/bench/9base_6.orig.tar.gz
&{0xc2000665a0}
2013/10/19 12:11:05 bz2
2013/10/19 12:11:05 gz
f = /tmp/bench/3depict_0.0.13.orig.tar.gz
&{0xc2000665d0}
2013/10/19 12:11:05 bz2
2013/10/19 12:11:05 gz
$ go build -compiler gccgo
$ ulimit -c unlimited
$ ./helloworld.O     
zsh: segmentation fault (core dumped)  ./helloworld.O
$ gdb helloworld.O /tmp/helloworld.O.core.18748 
Reading symbols from /home/michael/gocode/src/helloworld.O/helloworld.O...done.
[New LWP 18748]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7fffb3dfe000
Core was generated by `./helloworld.O'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007fd957f2f124 in read_uint32 () from /usr/lib/x86_64-linux-gnu/libgo.so.4
gdb $ bt
#0  0x00007fd957f2f124 in read_uint32 () from /usr/lib/x86_64-linux-gnu/libgo.so.4
#1  0x00007fd957f31c14 in backtrace_dwarf_add () from /usr/lib/x86_64-linux-gnu/libgo.so.4
#2  0x00007fd957f33a97 in elf_add () from /usr/lib/x86_64-linux-gnu/libgo.so.4
#3  0x00007fd957f33e5f in backtrace_initialize () from /usr/lib/x86_64-linux-gnu/libgo.so.4
#4  0x00007fd957f32be5 in fileline_initialize () from /usr/lib/x86_64-linux-gnu/libgo.so.4
#5  0x00007fd957f32ce2 in backtrace_pcinfo () from /usr/lib/x86_64-linux-gnu/libgo.so.4
#6  0x00007fd957f33051 in unwind () from /usr/lib/x86_64-linux-gnu/libgo.so.4
#7  0x00007fd9572f3ea9 in _Unwind_Backtrace () from /lib/x86_64-linux-gnu/libgcc_s.so.1
#8  0x00007fd957f330a5 in backtrace_full () from /usr/lib/x86_64-linux-gnu/libgo.so.4
#9  0x00007fd957ce15e6 in runtime_callers () from /usr/lib/x86_64-linux-gnu/libgo.so.4
#10 0x00007fd957cf1eeb in mcommoninit () at ../../../src/libgo/runtime/proc.c:666
#11 0x00007fd957cf31c3 in runtime_schedinit () at ../../../src/libgo/runtime/proc.c:476
#12 0x0000000000401c61 in main ()
gdb $ quit
$ ldd helloworld.O
	linux-vdso.so.1 (0x00007fff373fe000)
	libgo.so.4 => /usr/lib/x86_64-linux-gnu/libgo.so.4 (0x00007ff338c4f000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007ff338951000)
	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007ff33873a000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ff33838d000)
	/lib64/ld-linux-x86-64.so.2 (0x00007ff339998000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007ff338171000)
$ dpkg -S /usr/lib/x86_64-linux-gnu/libgo.so.4      
libgo4:amd64: /usr/lib/x86_64-linux-gnu/libgo.so.4

$ dpkg -S /lib/x86_64-linux-gnu/libm.so.6     
libc6:amd64: /lib/x86_64-linux-gnu/libm.so.6

$ dpkg -S /lib/x86_64-linux-gnu/libgcc_s.so.1
libgcc1:amd64: /lib/x86_64-linux-gnu/libgcc_s.so.1

$ dpkg -S /lib/x86_64-linux-gnu/libc.so.6    
libc6:amd64: /lib/x86_64-linux-gnu/libc.so.6

$ dpkg -S /lib/x86_64-linux-gnu/libpthread.so.0
libc6:amd64: /lib/x86_64-linux-gnu/libpthread.so.0

$ dpkg -l libc6 libgo4 libgcc1
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                                Version                Architecture           Description
+++-===================================-======================-======================-===========================================================================
ii  libc6:amd64                         2.17-2                 amd64                  Embedded GNU C Library: Shared libraries
rc  libc6:armel                         2.13-38                armel                  Embedded GNU C Library: Shared libraries
rc  libc6:i386                          2.13-38                i386                   Embedded GNU C Library: Shared libraries
ii  libgcc1:amd64                       1:4.8.1-10             amd64                  GCC support library
rc  libgcc1:armel                       1:4.7.2-5              armel                  GCC support library
rc  libgcc1:i386                        1:4.7.2-5              i386                   GCC support library
ii  libgo4:amd64                        4.8.1-10               amd64                  Runtime library for GNU Go applications


Let me know if you need more information.

-- System Information:
Debian Release: 7.0
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: armel
i386

Kernel: Linux 3.8.3 (SMP w/8 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages gccgo depends on:
ii  cpp        4:4.8.1-3
ii  gcc        4:4.8.1-3
ii  gccgo-4.8  4.8.1-10

gccgo recommends no packages.

Versions of packages gccgo suggests:
pn  gccgo-multilib  <none>

-- no debconf information

--- End Message ---
--- Begin Message --- 
unreproducible, closing.

--- End Message ---
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