[chsami]

Problem

Client error telemetry group 1280 (GotrPlugin 1.5.9, Microbot 2.6.30): 2 occurrences across 1 report, first seen 2026-10-12, last seen 2026-10-12.

java.lang.ClassCastException: class cc cannot be cast to class net.runelite.api.DynamicObject
  at GotrScript.lambda$getAvailableAltars$19:748
  at GotrScript.getAvailableAltars:758
  at GotrScript.lambda$enterAltar$14:409
  at Global.sleepUntil:176
  at GotrScript.enterAltar:409

Root cause

GotrScript.getAvailableAltars filters guardian altars by casting x.getRenderable() to DynamicObject (twice) with no type check. When an altar's renderable is a plain Model (an idle altar with no animation), the cast throws and breaks altar selection inside enterAltar's sleepUntil loop.

Change

• New package-private static helper GotrScript.isActiveAltarRenderable(Renderable): returns false unless the renderable is a DynamicObject, reads getAnimation() once, and returns animation != null && animation.getId() == 9363.
• The filter lambda calls this helper in place of the two unchecked casts. A non-DynamicObject renderable is treated as inactive, which matches the existing null-animation branch.
• GotrPlugin version 1.5.9 -> 1.5.10.

Validation

• New GotrAltarRenderableTest (5 cases): plain Model, null, DynamicObject with no animation, different animation id, active id 9363.
• ./gradlew test -PpluginList=GotrPlugin --tests 'net.runelite.client.plugins.microbot.gotr.*' --tests 'PluginManifestVersionTest': BUILD SUCCESSFUL (GotrAltarRenderableTest 5/5, GotrPluginRoundEventTest 3/3, GotrPortalClockTest 7/7, PluginManifestVersionTest 1/1).
• ./gradlew build -x test -PpluginList=GotrPlugin: BUILD SUCCESSFUL.

Known gaps

• Not exercised live in a GOTR round; validated by unit tests against the exact failing type path.
• Out of scope: MixologyScript.java:398 and :464 check instanceof DynamicObject but call getAnimation().getId() without a null check (possible NPE). Separate defect.

🤖 Generated with Claude Code

https://claude.ai/code/session_01LjtEMzQHGuq4M1Mpqk9pPV