Issue #14324 has been reported by Eregon (Benoit Daloze).

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Bug #14324: Should Exception#full_message include escape sequences?
https://bugs.ruby-lang.org/issues/14324

* Author: Eregon (Benoit Daloze)
* Status: Open
* Priority: Normal
* Assignee: sorah (Sorah Fukumori)
* Target version: 2.6
* ruby -v: ruby 2.5.0p0 (2017-12-25 revision 61468) [x86_64-linux]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
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$ ruby -e 'p RuntimeError.new("foo").full_message'
"\e[1mTraceback \e[m(most recent call last):\n-e:1:in `full_message': \e[1mfoo (\e[4;1mRuntimeError\e[m\e[1m)\n\e[m"

That is probably not intended.

$ ruby -e 'p RuntimeError.new("foo").full_message' |& cat
"-e:1:in `full_message': foo (RuntimeError)\n"

So Exception#full_message depends if stderr is a tty which seems wrong.
I think it should be the second result, i.e., no escape sequences.



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