Backport #1593
closed
Exception backtrace within eval lacks topmost function
Description
=begin
Hi,
I have a code snippet which uses eval to execute a Ruby fragment, protected with begin...rescue. If I attempt to display the exception backtrace within the rescue branch, the topmost line of context is missing. For instance:
except.rb:
def foo()
bar()
end
def bar()
baz()
end
def baz()
raise "Boom"
end
puts "Direct call."
begin
foo
rescue => e
puts e.backtrace
end
puts "\nThrough eval."
begin
eval "foo"
rescue => e
puts e.backtrace
end
Running this code produces:
\lib>except.rb
Direct call.
/lib/except.rb:10:in baz' /lib/except.rb:6:in bar'
/lib/except.rb:2:in `foo'
/lib/except.rb:15
Through eval.
/lib/except.rb:22
/lib/except.rb:6:in bar' /lib/except.rb:2:in foo'
(eval):1
Note that in the eval case, `baz' is not present in the backtrace.
=end
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