Incorrect cast hides full stack trace

[Craig Mitchell]

To reproduce:

1. Create a sample project.  Eg:  https://github.com/NaluKit/gwt-maven-springboot-archetype

2. Add a silly cast:   Integer notAnInt = (Integer)(Object)"hi";

3. Run super dev mode.

4. Visit your page.

5. It will crash on the cast, view the console.  It looks like this:

No mention of where your silly cast is.

However if you right click and "Copy console".  You get the following that does have where your silly cast is (highlighted in yellow):

Throwable.java:114 Uncaught Error: java.lang.ClassCastException
    at WPd_g$.Dz_g$ [as createError_0_g$] (Throwable.java:114:1)
    at WPd_g$.Oz_g$ [as initializeBackingError_0_g$] (Throwable.java:106:1)
    at WPd_g$.wz_g$ (Throwable.java:66:1)
    at WPd_g$.cA_g$ (Exception.java:29:1)
    at WPd_g$.kA_g$ (RuntimeException.java:29:1)
    at new WPd_g$ (ClassCastException.java:27:1)
    at dlf_g$ (InternalPreconditions.java:155:1)
    at qlf_g$ (InternalPreconditions.java:139:1)
    at plf_g$ (InternalPreconditions.java:134:1)
    at Lxc_g$ (Cast.java:74:1)
Dz_g$ @ Throwable.java:114
Oz_g$ @ Throwable.java:106
wz_g$ @ Throwable.java:66
cA_g$ @ Exception.java:29
kA_g$ @ RuntimeException.java:29
WPd_g$ @ ClassCastException.java:27
(anonymous) @ InternalPreconditions.java:155
(anonymous) @ InternalPreconditions.java:139
plf_g$ @ InternalPreconditions.java:134
Lxc_g$ @ Cast.java:74
amf_g$ @ App.java:43
OAc_g$ @ test_00046App__EntryMethodHolder.java:3
(anonymous) @ ModuleUtils.java:44
wI_g$ @ Impl.java:293
(anonymous) @ Impl.java:352
(anonymous) @ Impl.java:72
initializeModules_0_g$ @ ModuleUtils.java:55
(anonymous) @ GreetingService_TypeSerializer.java:10
PendingScript
h @ test.nocache.js:8
(anonymous) @ test.nocache.js:9
g @ test.nocache.js:6
w @ test.nocache.js:9
test @ test.nocache.js:17
(anonymous) @ test.nocache.js:18
PendingScript
Recompiler.loadApp @ test:348
(anonymous) @ test:568
(anonymous) @ test:286
__globals.callbacks.<computed> @ test:300
(anonymous) @ test?user.agent=safari&_callback=__gwt_sdm_globals.callbacks.c1777871930876:1
PendingScript
Recompiler.__injectScriptTag @ test:311
Recompiler.__jsonp @ test:304
Recompiler.compile @ test:284
Main.compile @ test:562
executeMain @ test:594
(anonymous) @ test:599
(anonymous) @ test:608
PendingScript
injectScriptTag @ test.nocache.js:52

Any idea why it doesn't show in the normal console?

[Frank]

Click on the arrow before 'Uncaught exception' in the console?
This should expand the exception?

Op maandag 4 mei 2026 om 07:27:00 UTC+2 schreef Craig Mitchell:

[Craig Mitchell]

Oh wow.  Yes, you're correct.  Massive air swing by me.  lol.  Thanks.