  

<table class="width100" style="width:100%;" data-cellspacing="1">
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<td colspan="6" class="form-title"><div class="center">
ETSI's Bug Tracker - Part 01: TTCN-3 Core Language
</div></td>
</tr>
<tr class="even">
<td colspan="6" class="form-title">View Issue Details</td>
</tr>
<tr class="odd">
<td colspan="6" class="print-spacer"><hr /></td>
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<tr class="even print-category">
<td class="print" width="16%">ID</td>
<td class="print" width="16%">Project</td>
<td class="print" width="16%">Category</td>
<td class="print" width="16%">View Status</td>
<td class="print" width="16%">Date Submitted</td>
<td class="print" width="16%">Last Update</td>
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<tr class="odd print">
<td class="print">0008004</td>
<td class="print">Part 01: TTCN-3 Core Language</td>
<td class="print">Clarification</td>
<td class="print">public</td>
<td class="print">16-02-2021 08:50</td>
<td class="print">23-11-2021 11:42</td>
</tr>
<tr class="even">
<td colspan="6" class="print-spacer"><hr /></td>
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<tr class="odd print">
<td class="print-category">Reporter</td>
<td class="print">Tomas Urban</td>
<td colspan="4" class="print"> </td>
</tr>
<tr class="even print">
<td class="print-category">Assigned To</td>
<td class="print">Jens Grabowski</td>
<td colspan="4" class="print"> </td>
</tr>
<tr class="odd print">
<td class="print-category">Priority</td>
<td class="print">normal</td>
<td class="print-category">Severity</td>
<td class="print">minor</td>
<td class="print-category">Reproducibility</td>
<td class="print">have not tried</td>
</tr>
<tr class="even print">
<td class="print-category">Status</td>
<td class="print">closed</td>
<td class="print-category">Resolution</td>
<td class="print">fixed</td>
<td colspan="2" class="print"> </td>
</tr>
<tr class="odd print">
<td class="print-category">Platform</td>
<td class="print"></td>
<td class="print-category">OS</td>
<td class="print"></td>
<td class="print-category">OS Version</td>
<td class="print"></td>
</tr>
<tr class="even print">
<td class="print-category">Product Version</td>
<td class="print"></td>
<td colspan="4" class="print"> </td>
</tr>
<tr class="odd">
<td class="print-category">Target Version</td>
<td class="print"></td>
<td class="print-category">Fixed in Version</td>
<td class="print"></td>
<td colspan="2" class="print"> </td>
</tr>
<tr class="even print">
<td class="print-category">Clause Reference(s)</td>
<td colspan="4" class="print">11.1, 11.2, 16.1.0</td>
<td></td>
</tr>
<tr class="odd print">
<td class="print-category">Source (company - Author)</td>
<td colspan="4" class="print">Elvior OÜ</td>
<td></td>
</tr>
<tr class="even">
<td colspan="6" class="print-spacer"><hr /></td>
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<tr class="odd print">
<td class="print-category">Summary</td>
<td colspan="5" class="print">0008004: Unassigned variables in return
statements</td>
</tr>
<tr class="even print">
<td class="print-category">Description</td>
<td colspan="5" class="print">The rules for using unassigned variables
seem to be inconsistent. The rule for template variables (11.2.d)
states:<br />
"Use of uninitialized template variables at other places than the left
hand side of assignments, in return statements, or as actual parameters
passed to formal parameters shall cause an error."<br />
<br />
There's a similar rule for value variables (11.1.d).<br />
<br />
However, the rule for functions returning templates 16.1.0.h states:
"The return statement shall return a template that is at least partially
initialized."<br />
<br />
Functions returning values are not restricted in such a way which makes
returning an uninitialized value theoretically possible. But what are
the rules for assignment in such case? Will it overwrite a variable or
leave it unchanged? And if there's this option why it is not possible to
use an uninitialized variable on the right side of an assignment
directly?<br />
<br />
In my opinion, uninitialized values should not occur in return
statements at all. I suggest to modify the rules 11.1.d and 11.2.d and
remove the words "return statement" from them. In addition to that, the
rules for functions should contain a new restriction saying that the
value or template returned by a function should be at least partially
initialized. The restriction 16.1.0 can be shortened then.</td>
</tr>
<tr class="odd print">
<td class="print-category">Steps To Reproduce</td>
<td colspan="5" class="print"></td>
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<tr class="even print">
<td class="print-category">Additional Information</td>
<td colspan="5" class="print"></td>
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<tr class="odd print">
<td class="print-category">Tags</td>
<td colspan="5" class="print">No tags attached.</td>
</tr>
<tr class="even print">
<td class="print-category">Relationships</td>
<td colspan="5" class="print"></td>
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<tr class="odd print">
<td class="print-category">Attached Files</td>
<td colspan="5" class="print"><img
src="http://oldforge.etsi.org/mantis/images/fileicons/doc.gif"
alt="docx" /> CR8004-1.docx (200,095) <span class="italic">09-09-2021
07:35</span><br />
http://oldforge.etsi.org/mantis/file_download.php?file_id=4007&amp;type=bug<br />
<img src="http://oldforge.etsi.org/mantis/images/fileicons/doc.gif"
alt="docx" /> CR8004-2.docx (177,281) <span class="italic">09-09-2021
12:17</span><br />
http://oldforge.etsi.org/mantis/file_download.php?file_id=4012&amp;type=bug</td>
</tr>
<tr class="even">
<td colspan="6" class="print-spacer"><hr /></td>
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<td class="form-title">Issue History</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even print-category">
<td class="row-category-history">Date Modified</td>
<td class="row-category-history">Username</td>
<td class="row-category-history">Field</td>
<td class="row-category-history">Change</td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">16-02-2021 08:50</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">New Issue</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">23-03-2021 16:15</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens
Grabowski</a></td>
<td class="print">Project</td>
<td class="print">TTCN-3 Change Requests =&gt; Part 01: TTCN-3 Core
Language</td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">27-04-2021 13:18</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=455">Wolfgang
Seka</a></td>
<td class="print">Note Added: 0015929</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">06-09-2021 09:55</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens
Grabowski</a></td>
<td class="print">Note Added: 0015935</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">06-09-2021 09:56</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens
Grabowski</a></td>
<td class="print">Assigned To</td>
<td class="print">=&gt; Tomas Urban</td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">06-09-2021 09:56</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens
Grabowski</a></td>
<td class="print">Status</td>
<td class="print">new =&gt; assigned</td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">09-09-2021 07:35</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">File Added: CR8004-1.docx</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">09-09-2021 07:35</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Note Added: 0015961</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">09-09-2021 07:35</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Assigned To</td>
<td class="print">Tomas Urban =&gt; Jacob Wieland - Spirent</td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">09-09-2021 07:35</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Status</td>
<td class="print">assigned =&gt; confirmed</td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">09-09-2021 12:17</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob
Wieland - Spirent</a></td>
<td class="print">File Added: CR8004-2.docx</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">09-09-2021 12:18</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob
Wieland - Spirent</a></td>
<td class="print">Status</td>
<td class="print">confirmed =&gt; assigned</td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">09-09-2021 12:18</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob
Wieland - Spirent</a></td>
<td class="print">Note Added: 0015968</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">09-09-2021 12:18</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob
Wieland - Spirent</a></td>
<td class="print">Assigned To</td>
<td class="print">Jacob Wieland - Spirent =&gt; Tomas Urban</td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">09-09-2021 12:18</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob
Wieland - Spirent</a></td>
<td class="print">Status</td>
<td class="print">assigned =&gt; confirmed</td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">10-09-2021 08:22</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Note Added: 0015973</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">10-09-2021 08:22</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Status</td>
<td class="print">confirmed =&gt; resolved</td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">10-09-2021 08:22</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Resolution</td>
<td class="print">open =&gt; fixed</td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">10-09-2021 08:22</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Assigned To</td>
<td class="print">Tomas Urban =&gt; Jens Grabowski</td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">23-11-2021 11:42</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens
Grabowski</a></td>
<td class="print">Note Added: 0016095</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">23-11-2021 11:42</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens
Grabowski</a></td>
<td class="print">Status</td>
<td class="print">resolved =&gt; closed</td>
<td></td>
<td></td>
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<td colspan="2" class="form-title">Notes</td>
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<td class="nopad" data-valign="top" width="20%"><table class="hide"
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<tr class="odd">
<td class="print">(0015929)</td>
</tr>
<tr class="even">
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=455">Wolfgang
Seka</a>   </td>
</tr>
<tr class="odd">
<td class="print">27-04-2021 13:18   </td>
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<td class="print">We've had a discussion in this area some year ago
already:<br />
We have cases where the return value of a function is only used in
specific cases (depending on the parameters).<br />
=&gt; For these functions it needs to be allowed to return an
uninitialised variable (or more precise, to use an uninitialised
variable in the return statement).<br />
Nevertheless in cases when the function returns an uninitialised
variable, the return value shall not be used, i.e. the function call
shall not be at the right hand side of an assignment.<br />
This is what we have in our test suites and therefore any further
restriction would be a non-backward (i.e. not acceptable) change.</td>
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<tr class="even">
<td colspan="2" class="print-spacer"><hr /></td>
</tr>
<tr class="odd">
<td class="nopad" data-valign="top" width="20%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">(0015935)</td>
</tr>
<tr class="even">
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens
Grabowski</a>   </td>
</tr>
<tr class="odd">
<td class="print">06-09-2021 09:55   </td>
</tr>
</tbody>
</table></td>
<td class="nopad" data-valign="top" width="85%"><table class="hide"
data-cellspacing="1">
<tbody>
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<td class="print">STF discussion: Remove resctriction 16.1.0.h and add a
rule for functions returning uninitialized values (maybe as 16.1.1
g).</td>
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<tr class="even">
<td colspan="2" class="print-spacer"><hr /></td>
</tr>
<tr class="odd">
<td class="nopad" data-valign="top" width="20%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">(0015961)</td>
</tr>
<tr class="even">
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a>   </td>
</tr>
<tr class="odd">
<td class="print">09-09-2021 07:35   </td>
</tr>
</tbody>
</table></td>
<td class="nopad" data-valign="top" width="85%"><table class="hide"
data-cellspacing="1">
<tbody>
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<td class="print">Resolution uploaded, please review.</td>
</tr>
</tbody>
</table></td>
</tr>
<tr class="even">
<td colspan="2" class="print-spacer"><hr /></td>
</tr>
<tr class="odd">
<td class="nopad" data-valign="top" width="20%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">(0015968)</td>
</tr>
<tr class="even">
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob
Wieland - Spirent</a>   </td>
</tr>
<tr class="odd">
<td class="print">09-09-2021 12:18   </td>
</tr>
</tbody>
</table></td>
<td class="nopad" data-valign="top" width="85%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">Fixed a typo and changed some wording. Please
review</td>
</tr>
</tbody>
</table></td>
</tr>
<tr class="even">
<td colspan="2" class="print-spacer"><hr /></td>
</tr>
<tr class="odd">
<td class="nopad" data-valign="top" width="20%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">(0015973)</td>
</tr>
<tr class="even">
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a>   </td>
</tr>
<tr class="odd">
<td class="print">10-09-2021 08:22   </td>
</tr>
</tbody>
</table></td>
<td class="nopad" data-valign="top" width="85%"><table class="hide"
data-cellspacing="1">
<tbody>
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<td class="print">I agree with the corrections made by Jacob. The last
draft resolves the issue raised in this CR and can be added to the next
version of the core language specification.</td>
</tr>
</tbody>
</table></td>
</tr>
<tr class="even">
<td colspan="2" class="print-spacer"><hr /></td>
</tr>
<tr class="odd">
<td class="nopad" data-valign="top" width="20%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">(0016095)</td>
</tr>
<tr class="even">
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens
Grabowski</a>   </td>
</tr>
<tr class="odd">
<td class="print">23-11-2021 11:42   </td>
</tr>
</tbody>
</table></td>
<td class="nopad" data-valign="top" width="85%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">implemented</td>
</tr>
</tbody>
</table></td>
</tr>
</tbody>
</table>
