As noted in the Try::Tiny man page, eval/$@ can be quite awkward in corner cases, because $@ has the same properties and problems as C's errno. While writing a regression test for definetemplate in which it couldn't find an appropriate template, I received
<span class="error">Error: failed to process template <span class="createlink">deftmpl</span> </span>
instead of the intended
<span class="error">Error: failed to process template <span class="createlink">deftmpl</span> template deftmpl not found</span>
which turned out to be because the "catch"-analogous block called gettext before it used $@, and gettext can call define_gettext, which uses eval.
Fixed in my branch smcv/ready/careful-eval. Another possibility for fixing this would be to depend on something like Try::Tiny, which is already indirectly recommended by ikiwiki, because RPC::XML, XML::Feed, etc., depend on it. --smcv