Browser UI disappears when exception is thrown

[yuhan0]

Minimal repro:

Start a deps.edn project:

{:paths ["src"] :deps {io.github.nextjournal/clerk {:mvn/version "0.15.957"}}} 

Start a repl and Clerk server, then show! the following src/repro.clj file

(ns repro
  (:require [nextjournal.clerk :as clerk]
            [nextjournal.clerk.viewer :as clerk.v]))

(clerk/with-viewer clerk.v/string-viewer "glub")

;; (throw (ex-info "whoops" {}))

Verify the page at http://localhost:7777/src/repro is displaying correctly, then uncomment the last line and re-evaluateclerk/show!

Expected outcome:

The error and stacktrace are displayed in red in the browser, which automatically hot-reloads once the exception-throwing expression is resolved (by commenting it out and evaluating clerk/show!)

Actual:

The browser page turns blank and has to be manually refreshed.

Additional details:

macOS 14.3.1 Clojure 1.11.2 Reproduced on both Firefox (version 123.0.1) and Chrome (Version 104.0.5061.0)

On Firefox, the console prints a series of stack traces from some sort of minified React code:

TypeError: b is null       react-dom.production.min.js:183:23
    oy Immutable
    tna component.cljs:423
    Hna template.cljs:128
    Ina template.cljs:131
    Qna template.cljs:234
    qg formatting.cljs:162
    $x clojure_mode.cljs:53
    pna component.cljs:317
    qna component.cljs:364
    rna component.cljs:394
    aw util.cljs:234
    Wla ratom.cljs:337
    rna component.cljs:392
    c component.cljs:410
    React 6
    l scheduler.production.min.js:12
    Y scheduler.production.min.js:14
    93 scheduler.production.min.js:12
    zl core.cljs:11933
    95 scheduler.production.min.js:20
    zl core.cljs:11933
    96 React
    zl core.cljs:11933
    98 React
    zl core.cljs:11933
    99 React
    zl core.cljs:11933
    Al core.cljs:12115
    <anonymous> parser.cljc:321

The issue appears to happen whenever the file contains a call to clerk/with-viewer / clerk/with-viewers, removing it causes the thrown exception to be displayed in the browser GUI.

Tested with eg. (clerk/with-viewers clerk/default-viewers 123)