Devel::StackTrace::AsHTML
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I combined all of the great works done by tokuhirom, kazuho, nipotan and Sartak: render Devel::StackTrace object as an HTML. As a bonus, if you render WithLexicals object it will display the lexical variables with JS toggle button.
Plack middleware and plackup has now been converted to use this new StackTrace screen. Pretty slick!