<div dir="ltr"><div>Hello,<br></div><div><br></div><div>The following Python (2.7) application results in a SIGSEGV in the last line.  </div><div>Unfortunately, I don't understand why.  </div><div>I guess that the Foo() object is deleted too early, although similar constructs (in the OK section of the program) work just fine.</div><div><br></div><blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px"><div><pre style="font-family:"dejavu sans mono";font-size:12pt"><pre style="font-family:"dejavu sans mono";font-size:12pt"><span style="color:rgb(0,0,128);font-weight:bold">from </span>PyQt4 <span style="color:rgb(0,0,128);font-weight:bold">import </span>QtCore<br><span style="color:rgb(0,0,128);font-weight:bold">import </span>faulthandler<br><br><br><span style="color:rgb(0,0,128);font-weight:bold">class </span>Foo(QtCore.QObject):<br>    sig_value_changed = QtCore.pyqtSignal(<span style="color:rgb(0,0,128)">object</span>)<br>    a_list = []<br><br>    <span style="color:rgb(0,0,128);font-weight:bold">def </span>bar(<span style="color:rgb(148,85,141)">self</span>):<br>        <span style="color:rgb(0,0,128);font-weight:bold">print</span>(<span style="color:rgb(0,128,0);font-weight:bold">"bar"</span>)<br><br><br><span style="color:rgb(128,128,128);font-style:italic"># OK<br></span>faulthandler.enable()<br>Foo().bar()<br>x = Foo()<br>x.sig_value_changed.connect(<span style="color:rgb(0,0,128);font-weight:bold">la<wbr>mbda</span>: <span style="color:rgb(0,0,128)">None</span>)<br>Foo().a_list.append(<span style="color:rgb(0,128,0);font-weight:bold">"x"</span>)<br><br><span style="color:rgb(128,128,128);font-style:italic"># SIGSEGV<br></span>Foo().sig_value_changed.<wbr>connect(<span style="color:rgb(0,0,128);font-weight:bold">lambda</span>: <span style="color:rgb(0,0,128)">None</span>)<br></pre></pre></div></blockquote><div><pre style="font-family:"dejavu sans mono";font-size:12pt"><div style="font-family:arial,sans-serif;font-size:small;white-space:normal"><br></div><div style="font-family:arial,sans-serif;font-size:small;white-space:normal">Is this a bug? Or am I missing something?</div><div style="font-family:arial,sans-serif;font-size:small;white-space:normal"><br></div><div style="font-family:arial,sans-serif;font-size:small;white-space:normal">Thanks in advance,</div><div style="font-family:arial,sans-serif;font-size:small;white-space:normal"><br></div><div style="font-family:arial,sans-serif;font-size:small;white-space:normal">Marc</div><div><br></div></pre></div></div>