C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  seg-fault on vector-auto-reserve          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Matthias Kaeppler Guest Posted: Sun Feb 27, 2005 7:54 pm    Post subject: seg-fault on vector-auto-reserve Hi, I'm holding a vector of boost::filesystem::pathS and a vector of pointers to them. I use the reserve member function on both to reserve space for 500 files. That means, for the 501th file added, the vector will grow to hold 1000 files right? Well, as soon as this happens I am getting a segmentation fault. I'm sure this is the reason, because the program crashed when I entered /usr/bin which holds about 1700 files, and if I change the initial capacity to 2000 instead, the program won't crash. I'm totally lost, any idea what could cause the crash? -- Matthias Kaeppler Back to top Matthias Kaeppler Guest Posted: Sun Feb 27, 2005 8:04 pm    Post subject: Re: seg-fault on vector-auto-reserve Matthias Kaeppler wrote: Quote: Hi, I'm holding a vector of boost::filesystem::pathS and a vector of pointers to them. I use the reserve member function on both to reserve space for 500 files. That means, for the 501th file added, the vector will grow to hold 1000 files right? Well, as soon as this happens I am getting a segmentation fault. I'm sure this is the reason, because the program crashed when I entered /usr/bin which holds about 1700 files, and if I change the initial capacity to 2000 instead, the program won't crash. I'm totally lost, any idea what could cause the crash? I did a segfault backtrace and recognized that it happens in std::partition invoked on the pointer-vector. Is this, because as soon as the vector gets resized, all pointers get invalidated? -- Matthias Kaeppler Back to top Victor Bazarov Guest Posted: Sun Feb 27, 2005 10:01 pm    Post subject: Re: seg-fault on vector-auto-reserve "Matthias Kaeppler" <nospam (AT) digitalraid (DOT) com> wrote... Quote: Matthias Kaeppler wrote: Hi, I'm holding a vector of boost::filesystem::pathS and a vector of pointers to them. I use the reserve member function on both to reserve space for 500 files. That means, for the 501th file added, the vector will grow to hold 1000 files right? Well, as soon as this happens I am getting a segmentation fault. I'm sure this is the reason, because the program crashed when I entered /usr/bin which holds about 1700 files, and if I change the initial capacity to 2000 instead, the program won't crash. I'm totally lost, any idea what could cause the crash? I did a segfault backtrace and recognized that it happens in std::partition invoked on the pointer-vector. Is this, because as soon as the vector gets resized, all pointers get invalidated? Quite possible. Resizing may require reallocation. Reallocation makes all iterators and references (and pointers) invalid. V Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.