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From: "zaskar_84 at yahoo dot com.ar" <sourceware-bugzilla@sourceware.org> To: gdb-prs@sourceware.org Subject: [Bug gdb/18905] New: Wrong value displayed when dereferencing list<T>::iterators Date: Tue, 01 Sep 2015 14:10:00 -0000 [thread overview] Message-ID: <bug-18905-4717@http.sourceware.org/bugzilla/> (raw) https://sourceware.org/bugzilla/show_bug.cgi?id=18905 Bug ID: 18905 Summary: Wrong value displayed when dereferencing list<T>::iterators Product: gdb Version: 7.10 Status: NEW Severity: normal Priority: P2 Component: gdb Assignee: unassigned at sourceware dot org Reporter: zaskar_84 at yahoo dot com.ar Target Milestone: --- When trying to inspect two different list's iterators in a Windows system, I see the same value for both even if the are not pointing to the same element. Here's an example: #include <iostream> #include <list> int main() { std::list<int> l = {1,2,3}; std::list<int>::iterator it1 = l.begin(); std::list<int>::iterator it2 = ++l.begin(); asm("int3"); // breakpoint here std::cout << *it1 << *it2 << std::endl; } If you run this with gdb and then type "p it1" and "p it2" in the pause, you will see that the two iterators' pointers are different, but if you type "p *it1" and "p *it2" you will see the same value for both. This is wrong, you can continue resume to see it. The example is compiled with mingw32-g++ and the arguments "-static-libstdc++ -static-libgcc -g -pedantic-errors -O0 -std=c++11". I've seen this error in gdb-7.8.1, and tested with gdb 7.9 and recent 7.10, and it still happens. I've compiled these versions myself with the same g++ version and msys, just with "configure" and "make", no special settings. Note that I only see this error in Windows, but it works ok in GNU/Linux for the same gdb versions (as provided by Slackware 14 and current). -- You are receiving this mail because: You are on the CC list for the bug.
next reply other threads:[~2015-09-01 14:10 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-09-01 14:10 zaskar_84 at yahoo dot com.ar [this message] 2024-01-03 14:08 ` [Bug gdb/18905] " ssbssa at sourceware dot org
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