Canonical vydal (email, blog, YouTube) Ubuntu 24.04 LTS Noble Numbat. Přehled novinek v poznámkách k vydání a také příspěvcích na blogu: novinky v desktopu a novinky v bezpečnosti. Vydány byly také oficiální deriváty Edubuntu, Kubuntu, Lubuntu, Ubuntu Budgie, Ubuntu Cinnamon, Ubuntu Kylin, Ubuntu MATE, Ubuntu Studio, Ubuntu Unity a Xubuntu. Jedná se o 10. LTS verzi.
Na YouTube je k dispozici videozáznam z včerejšího Czech Open Source Policy Forum 2024.
Fossil (Wikipedie) byl vydán ve verzi 2.24. Jedná se o distribuovaný systém správy verzí propojený se správou chyb, wiki stránek a blogů s integrovaným webovým rozhraním. Vše běží z jednoho jediného spustitelného souboru a uloženo je v SQLite databázi.
Byla vydána nová stabilní verze 6.7 webového prohlížeče Vivaldi (Wikipedie). Postavena je na Chromiu 124. Přehled novinek i s náhledy v příspěvku na blogu. Vypíchnout lze Spořič paměti (Memory Saver) automaticky hibernující karty, které nebyly nějakou dobu používány nebo vylepšené Odběry (Feed Reader).
OpenJS Foundation, oficiální projekt konsorcia Linux Foundation, oznámila vydání verze 22 otevřeného multiplatformního prostředí pro vývoj a běh síťových aplikací napsaných v JavaScriptu Node.js (Wikipedie). V říjnu se verze 22 stane novou aktivní LTS verzí. Podpora je plánována do dubna 2027.
Byla vydána verze 8.2 open source virtualizační platformy Proxmox VE (Proxmox Virtual Environment, Wikipedie) založené na Debianu. Přehled novinek v poznámkách k vydání a v informačním videu. Zdůrazněn je průvodce migrací hostů z VMware ESXi do Proxmoxu.
R (Wikipedie), programovací jazyk a prostředí určené pro statistickou analýzu dat a jejich grafické zobrazení, bylo vydáno ve verzi 4.4.0. Její kódové jméno je Puppy Cup.
IBM kupuje společnost HashiCorp (Terraform, Packer, Vault, Boundary, Consul, Nomad, Waypoint, Vagrant, …) za 6,4 miliardy dolarů, tj. 35 dolarů za akcii.
Byl vydán TrueNAS SCALE 24.04 “Dragonfish”. Přehled novinek této open source storage platformy postavené na Debianu v poznámkách k vydání.
Oznámeny byly nové Raspberry Pi Compute Module 4S. Vedle původní 1 GB varianty jsou nově k dispozici také varianty s 2 GB, 4 GB a 8 GB paměti. Compute Modules 4S mají na rozdíl od Compute Module 4 tvar a velikost Compute Module 3+ a předchozích. Lze tak provést snadný upgrade.
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mem.h
#include <QWidget>
class Mem : public QWidget
{
public:
Mem (QWidget * parent = NULL);
};
mem.cpp
#include "mem.h"
#include <QVBoxLayout>
#include <QLabel>
Mem::Mem (QWidget * parent)
: QWidget(parent)
{
QVBoxLayout * vbox = new QVBoxLayout(this);
QLabel * one = new QLabel("Hello");
QLabel * two = new QLabel("world!");
vbox->addWidget(one);
vbox->addWidget(two);
setLayout(vbox);
}
main.cpp
#include <QApplication>
#include "mem.h"
int main (int argc, char ** argv)
{
QApplication app(argc,argv);
Mem window;
window.show();
return app.exec();
}
A teď výpis z Valgrindu:
==26725== HEAP SUMMARY: ==26725== in use at exit: 83,285 bytes in 1,696 blocks ==26725== total heap usage: 17,743 allocs, 16,047 frees, 1,890,066 bytes allocated ==26725== ==26725== LEAK SUMMARY: ==26725== definitely lost: 192 bytes in 2 blocks ==26725== indirectly lost: 912 bytes in 34 blocks ==26725== possibly lost: 1,720 bytes in 9 blocks ==26725== still reachable: 80,461 bytes in 1,651 blocks ==26725== suppressed: 0 bytes in 0 blocksVýpis s
--leak-check=full
==27097== Memcheck, a memory error detector ==27097== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. ==27097== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info ==27097== Command: ./memory_leak ==27097== Parent PID: 24134 ==27097== ==27097== ==27097== HEAP SUMMARY: ==27097== in use at exit: 83,285 bytes in 1,696 blocks ==27097== total heap usage: 17,438 allocs, 15,742 frees, 1,884,214 bytes allocated ==27097== ==27097== 120 bytes in 1 blocks are possibly lost in loss record 116 of 170 ==27097== at 0x4024150: memalign (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so) ==27097== by 0x402420E: posix_memalign (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so) ==27097== by 0x509FFA9: ??? (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50A14C8: g_slice_alloc (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50A219D: g_slist_prepend (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50A516C: g_strsplit (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50BACB8: g_get_language_names (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50BB216: ??? (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50AD289: g_thread_init_glib (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50364B5: g_thread_init (in /usr/lib/libgthread-2.0.so.0.2800.6) ==27097== by 0x4C61941: QEventDispatcherGlibPrivate::QEventDispatcherGlibPrivate(_GMainContext*) (in /usr/lib/qt/lib/libQtCore.so.4.7.0) ==27097== by 0x4227BB5: ??? (in /usr/lib/qt/lib/libQtGui.so.4.7.0) ==27097== ==27097== 124 bytes in 1 blocks are definitely lost in loss record 117 of 170 ==27097== at 0x4025BB8: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so) ==27097== by 0x53CCE52: ??? (in /usr/lib/libxcb.so.1.1.0) ==27097== by 0x53CCF54: ??? (in /usr/lib/libxcb.so.1.1.0) ==27097== by 0x53CC813: xcb_connect_to_display_with_auth_info (in /usr/lib/libxcb.so.1.1.0) ==27097== by 0x53CCB5B: xcb_connect (in /usr/lib/libxcb.so.1.1.0) ==27097== by 0x52D5652: _XConnectXCB (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52C5476: XOpenDisplay (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x41FBC5C: ??? (in /usr/lib/qt/lib/libQtGui.so.4.7.0) ==27097== by 0x417DAD7: QApplicationPrivate::construct(_XDisplay*, unsigned long, unsigned long) (in /usr/lib/qt/lib/libQtGui.so.4.7.0) ==27097== by 0x417E342: QApplication::QApplication(int&, char**, int) (in /usr/lib/qt/lib/libQtGui.so.4.7.0) ==27097== by 0x8049E7A: main (in /home/yenn/qt/memory_leak/memory_leak) ==27097== ==27097== 360 bytes in 3 blocks are possibly lost in loss record 132 of 170 ==27097== at 0x4024150: memalign (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so) ==27097== by 0x402420E: posix_memalign (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so) ==27097== by 0x509FFA9: ??? (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50A14E5: g_slice_alloc (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50A219D: g_slist_prepend (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50A516C: g_strsplit (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50BACB8: g_get_language_names (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50BB216: ??? (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50AD289: g_thread_init_glib (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50364B5: g_thread_init (in /usr/lib/libgthread-2.0.so.0.2800.6) ==27097== by 0x4C61941: QEventDispatcherGlibPrivate::QEventDispatcherGlibPrivate(_GMainContext*) (in /usr/lib/qt/lib/libQtCore.so.4.7.0) ==27097== by 0x4227BB5: ??? (in /usr/lib/qt/lib/libQtGui.so.4.7.0) ==27097== ==27097== 980 (68 direct, 912 indirect) bytes in 1 blocks are definitely lost in loss record 150 of 170 ==27097== at 0x4025C9E: realloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so) ==27097== by 0x52E9A57: ??? (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52E9FD0: ??? (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52EBC91: ??? (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52EC4B4: _XlcCreateLC (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x530F509: _XlcUtf8Loader (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52F43BB: _XOpenLC (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52F467D: _XrmInitParseInfo (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52DAA10: ??? (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52DE1B7: XrmGetStringDatabase (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52B9ADE: ??? (in /usr/lib/libX11.so.6.3.0) ==27097== by 0x52B9D0E: XGetDefault (in /usr/lib/libX11.so.6.3.0) ==27097== ==27097== 1,240 bytes in 5 blocks are possibly lost in loss record 156 of 170 ==27097== at 0x4024150: memalign (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so) ==27097== by 0x402420E: posix_memalign (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so) ==27097== by 0x509FFA9: ??? (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50A14E5: g_slice_alloc (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50545F8: g_array_sized_new (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50546D2: g_array_new (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50AD16E: g_static_private_set (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x5064846: g_get_filename_charsets (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50648CC: ??? (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50AD279: g_thread_init_glib (in /usr/lib/libglib-2.0.so.0.2800.6) ==27097== by 0x50364B5: g_thread_init (in /usr/lib/libgthread-2.0.so.0.2800.6) ==27097== by 0x4C61941: QEventDispatcherGlibPrivate::QEventDispatcherGlibPrivate(_GMainContext*) (in /usr/lib/qt/lib/libQtCore.so.4.7.0) ==27097== ==27097== LEAK SUMMARY: ==27097== definitely lost: 192 bytes in 2 blocks ==27097== indirectly lost: 912 bytes in 34 blocks ==27097== possibly lost: 1,720 bytes in 9 blocks ==27097== still reachable: 80,461 bytes in 1,651 blocks ==27097== suppressed: 0 bytes in 0 blocks ==27097== Reachable blocks (those to which a pointer was found) are not shown. ==27097== To see them, rerun with: --leak-check=full --show-reachable=yes ==27097== ==27097== For counts of detected and suppressed errors, rerun with: -v ==27097== ERROR SUMMARY: 5 errors from 5 contexts (suppressed: 75 from 9)OS: Slackware-current, g++ 4.5.3, QT 4.7 Je to chyba v QT nebo dělám něco špatně já?
Řešení dotazu:
Nijak zvlášť jsem to nestudoval, ale IMHO minimálně neuklízíš vbox, one a two
addWidget()
[...]
Note: The ownership of item is transferred to the layout, and it's the layout's responsibility to delete it
Pokuď layout manager uklízí sám své widgety a widget svůj layout manager, pak je všechno v pořádku.
30.5.2011 14:38
David Watzke | skóre: 74
| blog: Blog...
| Praha
29.5.2011 23:09
Release 1.7 (2010-08-13)
========================
- Always wake up readers after writing
- Get rid of PATH_MAX and MAXPATHLEN
- Add ~ operator support in code generator
- xcb_open: Improve protocol/host parsing
- xcb_connect_to_display_with_auth_info: Fix memory leak
- Report which extensions are being built
Tiskni
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