--- /dev/null
+\version "2.14.2"
+
+#(ly:set-option 'warning-as-error #f)
+
+\header {
+ texidoc = "LilyPond does not support multiple concurrent slurs with the
+parentheses syntax. In this case, warnings will be given and the nested
+slur will not be generated. However, one can can create a second slur with
+a different spanner-id."
+}
+
+altSlur = #(make-music 'SlurEvent 'span-direction START 'spanner-id "alt")
+altSlurEnd = #(make-music 'SlurEvent 'span-direction STOP 'spanner-id "alt")
+
+\relative c'' {
+ % This will give warnings ("Already have slur" and "Cannot end slur")
+ c4(( d4)( e4) f) |
+ % This will give two overlapping slurs:
+ d( d\altSlur e) f\altSlurEnd |
+
+}