[Bug lto/48309] New: gcc -flto -fuse-linker-plugin generates crashing executables on MinGW

[gordon.magnusson at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48309

           Summary: gcc -flto -fuse-linker-plugin generates crashing
                    executables on MinGW
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: lto
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: gordon.magnus...@gmail.com
              Host: i686-pc-mingw32
            Target: i686-pc-mingw32
             Build: i686-pc-mingw32


C:\bugreport>ld -v
GNU ld (GNU Binutils) 2.21.51.20110326

C:\bugreport>gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=c:/mingw/bin/../libexec/gcc/i686-pc-mingw32/4.6.0/lto-wrapper.exe
Target: i686-pc-mingw32
Configured with: ../src/configure --prefix=/c/temp/gcc/dest
--enable-languages=c,c++ --with-arch=i686 --with-tune=generic
--disable-libstdcxx-pch --disable-nls --disable-shared
--disable-sjlj-exceptions --disable-win32-registry --enable-checking=release
--enable-lto
Thread model: win32
gcc version 4.6.0 (GCC)

C:\bugreport>type foo.cpp
#include <iostream>
#include <ostream>
using namespace std;

int main() {
    cout << "Hello, C++ world!" << endl;
}

C:\bugreport>g++ foo.cpp -o foo1.exe

C:\bugreport>foo1
Hello, C++ world!

C:\bugreport>g++ -flto -fno-use-linker-plugin foo.cpp -o foo2.exe

C:\bugreport>foo2
Hello, C++ world!

C:\bugreport>g++ -flto -fuse-linker-plugin foo.cpp -o foo3.exe

C:\bugreport>foo3
Hello, C++ world!

C:\bugreport>type bar.c
#include <stdio.h>

int main(void) {
    puts("Hello, C world!");
    return 0;
}

C:\bugreport>gcc bar.c -o bar1.exe

C:\bugreport>bar1
Hello, C world!

C:\bugreport>gcc -flto -fno-use-linker-plugin bar.c -o bar2.exe

C:\bugreport>bar2
Hello, C world!

C:\bugreport>gcc -flto -fuse-linker-plugin bar.c -o bar3.exe

C:\bugreport>bar3
[Window Title]
Microsoft Windows

[Main Instruction]
bar3.exe has stopped working

[Content]
Windows can check online for a solution to the problem.

[^] Hide problem details  [Check online for a solution and close the program]
[Close the program]
Problem signature:
  Problem Event Name:    APPCRASH
  Application Name:    bar3.exe
  Application Version:    0.0.0.0
  Application Timestamp:    4d90117c
  Fault Module Name:    StackHash_fd00
  Fault Module Version:    0.0.0.0
  Fault Module Timestamp:    00000000
  Exception Code:    c0000005
  Exception Offset:    00000000
  OS Version:    6.0.6002.2.2.0.256.1
  Locale ID:    1033
  Additional Information 1:    fd00
  Additional Information 2:    ea6f5fe8924aaa756324d57f87834160
  Additional Information 3:    fd00
  Additional Information 4:    ea6f5fe8924aaa756324d57f87834160

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