Im trying to get the backtrace in sinatra in case of an error. I

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Editorial Team

Asked: June 17, 20262026-06-17T08:23:53+00:00 2026-06-17T08:23:53+00:00

Im trying to get the backtrace in sinatra in case of an error.
I know rails has one in

Rails.respond_to?(:backtrace_cleaner)

and I saw that sinatra is suppose to have one (by default enabled) in STDERR
So i tried

STDERR.inspect

and I got #<IO:<STDERR>>

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Editorial Team · Answer 1 · 2026-06-17T08:23:54+00:00

Editorial Team

When rescuing the exception, catch the exception object.

 begin
   raise "hello"
 rescue => e
   e.backtrace
 end

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