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<p>Hello</p>
<p>I'm using Mojolicious::Lite, a Perl framework, which should
support PSGI.</p>
<p>The smallest possible app, however, does not run</p>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;">===</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;">
<div style="margin: 0px; padding: 0px; border: 0px;">#!/usr/bin/env
perl</div>
<div style="margin: 0px; padding: 0px; border: 0px;">use
Mojolicious::Lite;</div>
<div style="margin: 0px; padding: 0px; border: 0px;">get '/' =>
sub {</div>
<div style="margin: 0px; padding: 0px; border: 0px;"> my $c =
shift;</div>
<div style="margin: 0px; padding: 0px; border: 0px;">
$c->render(text=>'hello');</div>
<div style="margin: 0px; padding: 0px; border: 0px;">};</div>
<div style="margin: 0px; padding: 0px; border: 0px;"><br>
</div>
<div style="margin: 0px; padding: 0px; border: 0px;">app->start;</div>
</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;">===</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><br>
</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;">
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;">
<div style="margin: 0px; padding: 0px; border: 0px;">2019/01/23
09:41:23.029 [error] 26579#26579 [unit] #4: PSGI: Failed to
run Perl Application:</div>
<div style="margin: 0px; padding: 0px; border: 0px;">Undefined
subroutine &main::1 called.</div>
</div>
</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><br>
</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;">plackup runs it Ok, so
there is some incompatibility, which I do not know how to trace.</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><br>
</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;">What kind of error in
framework can it be and how to trace it?</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><br>
</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;">Alex<br
class="Apple-interchange-newline">
</div>
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34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><br>
</div>
<div style="margin: 0px; padding: 0px; border: 0px; color: rgb(34,
34, 34); font-family: Arial, Helvetica, sans-serif; font-size:
13px; font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><br>
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