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Showing content from https://github.com/clojure-emacs/cider/issues/3763 below:

Completion Popup causes `cider-docview-render` to error when symbol being completed does not have a docstring. · Issue #3763 · clojure-emacs/cider · GitHub

Expected behavior

Completion works without throwing a backtrace

Actual behavior

Debugger entered--Lisp error: (wrong-type-argument arrayp nil)
  replace-regexp-in-string("\n  " "\n" nil)
  cider-docstring--format(nil)
  (cider-docstring--trim (cider-docstring--format fetched-doc))
  ...
  cider-docview-render(#<buffer *cider-doc*> #("some-symbol" 0 1 (ns "tech.unravel.some.ns.core" type "function")) (dict "status" ("done") "arglists-str" "[some]" "column" 1 "file" "file:/path/to/core.clj" "id" "73" "line" 107 "name" "some-symbol" "ns" "tech.unravel.some.ns.core" "session" "d0de2276-b315-40fc-a5dc-e2c3a2720e01" "time-stamp" "2024-12-18 16:01:59.332041000") :compact)
  cider-create-doc-buffer(#(("some-symbol" 0 1 (ns "tech.unravel.some.ns.core" type "function")) :compact)
  cider-create-compact-doc-buffer(#("some-symbol" 0 1 (ns "tech.unravel.some.ns.core" type "function")))
  corfu-popupinfo--get-documentation(#("some-symbol" 0 1 (ns "tech.unravel.some.ns.core" type "function")))
  corfu-popupinfo--show(#("some-symbol" 0 1 (ns "tech.unravel.some.ns.core" type "function")))

Steps to reproduce the problem

Use corfu for completion
Try to complete a symbol where the first completion does not have a docstring
Wait a short while (2s by default) for corfu to try creating a info popup
See the backtrace

Environment & Version information CIDER version information

;; CIDER 1.16.1 (Kherson), nREPL 1.3.0
;; Clojure 1.12.0-2, Java 23.0.1

Lein / Clojure CLI version

Clojure CLI version 1.12.0.1488

Emacs version

GNU Emacs 31.0.50 (build 1, aarch64-apple-darwin22.6.0, NS appkit-2299.77 Version 13.6.7 (Build 22G720)) of 2024-07-02

Operating system

MacOS version 15.2

JDK distribution

openjdk version "23.0.1" 2024-10-15

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