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Plack::Middleware::StaUseraContributed Perl DoPlack::Middleware::StackTrace(3)

       Plack::Middleware::StackTrace - Displays	stack trace when your app dies

	 enable	"StackTrace";

       This middleware uses $SIG{__DIE__} to intercept all exceptions (run-
       time errors) happening in your application, even	those that are caught.
       For each	exception it builds a detailed stack trace.

       If the applications aborts by throwing an exception it will be caught
       and matched against the saved stack traces. If a	match is found it will
       be displayed as a nice stack trace screen, if not then the exception
       will be reported	without	a stack	trace.

       The stack trace is also stored in the environment as a plaintext	and
       HTML under the key "plack.stacktrace.text" and "plack.stacktrace.html"
       respectively, so	that middleware	further	up the stack can reference it.

       This middleware is enabled by default when you run plackup in the
       default development mode.

       You're recommended to use this middleware during	the development	and
       use Plack::Middleware::HTTPExceptions in	the deployment mode as a
       replacement, so that all	the exceptions thrown from your	application
       still get caught	and rendered as	a 500 error response, rather than
       crashing	the web	server.

       Catching	errors in streaming response is	not supported.

   Stack Trace Module
       The Devel::StackTrace::WithLexicals module will be used to capture the
       stack trace if the installed version is 0.08 or later. Otherwise
       Devel::StackTrace is used.

       Gathering the information for a stack trace via Devel::StackTrace is
       slow, and Devel::StackTrace::WithLexicals is significantly slower
       still.  This is not usually a concern in	development and	when
       exceptions are rare.  However, your application may include code	that's
       throwing	and catching exceptions	that you're not	aware of. Such code
       will run	significantly slower with this module.

	     enable "StackTrace", force	=> 1;

	   Force display the stack trace when an error occurs within your
	   application and the response	code from your application is 500.
	   Defaults to off.

	   The use case	of this	option is that when your framework catches all
	   the exceptions in the main handler and returns all failures in your
	   code	as a normal 500	PSGI error response. In	such cases, this
	   middleware would never have a chance	to display errors because it
	   can't tell if it's an application error or just random "eval" in
	   your	code. This option enforces the middleware to display stack
	   trace even if it's not the direct error thrown by the application.

	     enable "StackTrace", no_print_errors => 1;

	   Skips printing the text stacktrace to console ("psgi.errors").
	   Defaults to 0, which	means the text version of the stack trace
	   error is printed to the errors handle, which	usually	is a standard

       Tokuhiro	Matsuno

       Tatsuhiko Miyagawa

       Devel::StackTrace::AsHTML Plack::Middleware

perl v5.32.0			  2018-02-10  Plack::Middleware::StackTrace(3)


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