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Bug #15558

closed

Should Exception#exception copy the backtrace?

Added by Eregon (Benoit Daloze) about 5 years ago. Updated over 4 years ago.

Status:
Closed
Target version:
-
ruby -v:
ruby 2.6.0p0 (2018-12-25 revision 66547) [x86_64-linux]
[ruby-core:91232]

Description

Currently it does not on MRI:

ruby -e 'begin raise "foo"; rescue => e; c=e.exception "bar"; p c.backtrace; end'
nil

But it does on JRuby 9.2.5.0 and TruffleRuby 1.0.0-rc11:

truffleruby -e 'begin raise "foo"; rescue => e; c=e.exception "bar"; p e.backtrace; end'
["-e:1:in `<main>'"]

This means in some cases, code needs about this difference such as in
https://github.com/asciidoctor/asciidoctor/blob/41da20a47a8da96966ef3ec1c2f509e07e7920e3/lib/asciidoctor.rb#L1322-L1338
More context in:
https://github.com/oracle/truffleruby/issues/1542#issuecomment-456850066

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