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-rw-r--r--actionmailer/lib/action_mailer/vendor/tmail/quoting.rb5
1 files changed, 4 insertions, 1 deletions
diff --git a/actionmailer/lib/action_mailer/vendor/tmail/quoting.rb b/actionmailer/lib/action_mailer/vendor/tmail/quoting.rb
index 4420f2ea6b..b593efafcd 100644
--- a/actionmailer/lib/action_mailer/vendor/tmail/quoting.rb
+++ b/actionmailer/lib/action_mailer/vendor/tmail/quoting.rb
@@ -79,10 +79,13 @@ module TMail
def convert_to(text, to, from)
return text unless to && from
text ? Iconv.iconv(to, from, text).first : ""
- rescue Iconv::IllegalSequence
+ rescue Iconv::IllegalSequence, Errno::EINVAL
# the 'from' parameter specifies a charset other than what the text
# actually is...not much we can do in this case but just return the
# unconverted text.
+ #
+ # Ditto if either parameter represents an unknown charset, like
+ # X-UNKNOWN.
text
end
rescue LoadError