Hi,<div><br></div><div>   there are different topics involved here.</div><div><br></div><div>The first one regards the version of Dancer you&#39;re running. I tried to start a sample application with &quot;dancer -a Whatever&quot; and added a warn call in the only route handler, but did not get your error. I ran my example with Dancer 1.2002 and the result was the error I expected, which leads us to the following point.</div>

<div><br></div><div>The second topic deals with warnings promoted to fatal errors. This is triggered by the &quot;warnings&quot; setting, whose documentation is in Dancer::Config. This setting is enabled by default in the &quot;development&quot; environment, so you should turn this off to get rid of the errors. From what I understood, this is meant to be a useful feature to ensure that you don&#39;t get warnings from modules, etc. which you might want to catch as soon as you&#39;re in the development process.</div>

<div><br></div><div>About your muscle memory, if you want to use &quot;warn&quot; instead of &quot;warning&quot; I think that your best option is to propose a patch which I suppose could be developed along the following lines:</div>

<div><br></div><div>* read how to contribute to the project in <a href="https://github.com/sukria/Dancer/blob/devel/lib/Dancer/Development.pod">https://github.com/sukria/Dancer/blob/devel/lib/Dancer/Development.pod</a></div>

<div><br></div><div>* add a configuration option &quot;warn_as_warning&quot; in lib/Dancer/Config.pm</div><div><br></div><div>* use this configuration option in lib/Dancer/Route.pm subroutine &quot;execute&quot; like this:</div>

<div># -------------------------------------</div><div><div> sub execute {</div><div>     my ($self) = @_;</div><div> </div><div>-    if (Dancer::Config::setting(&#39;warnings&#39;)) {</div><div>+    if (Dancer::Config::setting(&#39;warn_as_warning&#39;)) {</div>

<div>+      local $SIG{__WARN__} = \&amp;Dancer::Logger::warning;</div><div>+      return $self-&gt;code-&gt;();</div><div>+    }</div><div>+    elsif (Dancer::Config::setting(&#39;warnings&#39;)) {</div><div>         my $warning;</div>

<div>         local $SIG{__WARN__} = sub { $warning = $_[0] };</div><div>         my $content = $self-&gt;code-&gt;();</div></div><div># -------------------------------------</div><div><br></div><div>* write tests</div><div>

<br></div><div>Anyway, separating how you send warnings in your web application from how you (or others) do that in the modules you use might be very useful to detect problems early... a good reason to teach something new to your muscle memory!</div>

<div><br></div><div>Cheers,</div><div><br></div><div>    Flavio.<br><br></div><div><br></div><div><br><div class="gmail_quote">On Sat, Jan 22, 2011 at 2:08 AM, Brian E. Lozier <span dir="ltr">&lt;<a href="mailto:brian@massassi.com">brian@massassi.com</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">As a perl veteran I am used to using the built-in &quot;warn&quot; function to<br>
write to STDERR.  Under mod_perl/Apache this prints to the web<br>
server&#39;s error log.  Using my dancer app like this:<br>
<br>
plackup -L Shotgun <a href="http://app.pl" target="_blank">app.pl</a><br>
<br>
If I have a &quot;warn&quot; anywhere in my app, I get an error message:<br>
<br>
Error trace<br>
<br>
status code needs to be an integer greater than or equal to 100 at<br>
/usr/local/lib/perl5/site_perl/5.12.2/Plack/Middleware/StackTrace.pm<br>
line 27<br>
<br>
However, if I print STDERR &quot;msg&quot;; that works.  My question is: what<br>
happened to warn?  Can it be fixed so that it writes to STDERR instead<br>
of triggering an error message?<br>
<br>
I know about the &quot;warning&quot; function but it&#39;s really hard to change 10<br>
years of muscle memory!<br>
<br>
Thanks,<br>
Brian<br>
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</blockquote></div><br></div>