Backport #1593: Exception backtrace within eval lacks topmost function

• Status: Closed
• Assignee: nobu (Nobuyoshi Nakada)

[chowlett (Chris Howlett)]

=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

[ujihisa (Tatsuhiro Ujihisa)]

• Status changed from Open to Assigned
• Assignee set to nobu (Nobuyoshi Nakada)

=begin

=end

[jeremyevans0 (Jeremy Evans)]

• Tracker changed from Bug to Backport
• Project changed from Ruby 1.8 to Backport187
• Description updated (diff)
• Status changed from Assigned to Closed
• ruby -v deleted (ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32])