#1330 Tcl objects not deleted on program exit

['sood]

With SWIG (2.0, wrapping with the -tcl and -c++ flags) wrapped object code in tclsh (8.5)...

I have a wrapped class A. On creation it generates a thread that does some background work. On destruction it joins with the spawned thread and dies a happy object.

#!/usr/bin/env tclsh
A a
a -delete ; # or rename a ""
exit

On the other hand, death without notice results in violent throes:

#!/usr/bin/env tclsh
A a
exit ; # <-- There's a segfault here; 'a' never got the memo to clean up

I'm inclined to say this is a bug on SWIG's end due to this behavior not being mentioned in the 2.0 docs in the last bit of section 37.3.6 or in section 37.3.7. At the very least, I think the docs should mention this.

['sood]

Woop - forgot to specify minor version number. 2.0.9.

[Olly Betts]

I'm going to commit the following to address this - it'll be in SWIG 4.2.0:

--- a/Doc/Manual/Tcl.html
+++ b/Doc/Manual/Tcl.html
@@ -1227,7 +1227,15 @@ _108fea88_p_Bar

 <p>
 Finally, to destroy objects created from Tcl, you can either let the object
-name go out of scope or you can explicitly delete the object.  For example:
+name go out of scope or you can explicitly delete the object as shown below.
+Objects won't get automatically destroyed when the Tcl program exits, so if
+it's important that the C++ destructor is called for a class you'll need to
+make sure that you explicitly do this for objects of that class before program
+exit.
+</p>
+
+<p>
+For example:
 </p>

 <div class="code">