Hi all, I have been using the boost filesystem library for a little while under NetBSD and all is fine however I have just been porting our application over to windows and have come across a problem with the boost filesystem library (Boost 1.33.0). I am compiling with MinGW (g++ 3.4.2) on a Windows XP system. When debugging our application in gdb i get a SIGTRAP with an Invalid Address specified to RtlFreeHeap. This is when using the path::native_file_string() method. I also have another problem where a SEGFAULT ocurrs when using the boost::filesystem::exists() method, however i think that may be linked to the native_file_string() error. I wrote a small test program as shown below to reproduce the error when using path::native_file_string() #include <iostream> #include <boost/filesystem/operations.hpp> int main() { std::string filename = "test.dat"; boost::filesystem::path boost_filename(filename); std::cout << "Filename: " << filename << std::endl; std::cout << "Boost string(): " << boost_filename.string() << std::endl; std::cout << "Boost native_file_string(): " << boost_filename.native_file_string() << std::endl; return 0; } This compiles fine, and it also will run fine outside of GDB. However if i run it inside GDB i get errors on the line that uses boost_native_file_string() that are shown below: Starting program: X:\msys\Utils_test/./a.exe Program received signal SIGTRAP, Trace/breakpoint trap. 0x7c901231 in _libkernel32_a_iname () (gdb) warning: HEAP[a.exe]: warning: Invalid Address specified to RtlFreeHeap( 003D0000, 003D5138 ) bt #0 0x7c901231 in _libkernel32_a_iname () #1 0x7c96c943 in _libkernel32_a_iname () #2 0x7c96cd80 in _libkernel32_a_iname () #3 0x7c96df66 in _libkernel32_a_iname () #4 0x7c94a5d0 in _libkernel32_a_iname () #5 0x7c9268ad in _libkernel32_a_iname () #6 0x77c2c2de in _libkernel32_a_iname () #7 0x00409855 in operator delete(void*) () at boost_test.cpp:59 #8 0x0042e2dc in std::string::_Rep::_M_destroy(std::allocator<char> const&) () at c:/Boost/include/boost-1_33/boost/filesystem/path.hpp:57 #9 0x00430d68 in std::string::~string() () at c:/Boost/include/boost-1_33/boost/filesystem/path.hpp:57 #10 0x004015d6 in main () at boost_test.cpp:12 (gdb) I also have a larger program where part of its code uses the boost filesystem library that looks like: static std::string GetUnusedFileName(const char* suggestion = "test_file") { int count = 0; std::string base = suggestion; std::string filename(base + ".dat"); while(boost::filesystem::exists(boost::filesystem::path(filename))) { std::ostringstream stream; stream << base << "_" << count << ".dat"; filename = stream.str(); count++; } return filename; } This will usually cause a seg fault when calling the filesystem::exists() method. I currently do not have a stack trace for that and was unable to reproduce one but i think the two errors may be linked. Am i using the system correctly? The code works fine in NetBSD so i assume so. Has this bug been identified in the past and possibly fixed for the 1_33_1_beta release? I started compiling that but there are a few changes i need to make to the build system to go to 1_33_1 that may be time consuming for a problem that may not yet have been addressed anyway. Thanks for any help in advance, Brendon Costa.