bug#59596: [PATCH 2/3] Add an interactive session exception error message.

---
 doc/ref/api-data.texi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/ref/api-data.texi b/doc/ref/api-data.texi
index 8c18b4d40..143434213 100644
--- a/doc/ref/api-data.texi
+++ b/doc/ref/api-data.texi
@@ -4798,6 +4798,11 @@ Notice that if we try the same @code{assq-set!} call with
 
 @lisp
 (assq-set! car2-properties 'seat-colour 'black)
+@print{}
+ice-9/boot-9.scm:1669:16: In procedure raise-exception:
+In procedure set-cdr!: Wrong type argument in position 1 (expecting mutable pair): (seat-colour . red)
+
+Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.
 @end lisp
 
 This is due to the fact that literal alists are immutable. If you want
-- 
2.30.2