TUI crash: undefined is not an object (evaluating 'U.r')

Description

The opencode TUI crashed with an unexpected error.

Error: undefined is not an object (evaluating 'U.r')

Stack trace:

TypeError: undefined is not an object (evaluating 'U.r')
    at j0 (B:/~BUN/root/chunk-jwjk4syb.js:33:2237)
    at <anonymous> (B:/~BUN/root/chunk-jwjk4syb.js:45:1190)
    at mJ (B:/~BUN/root/chunk-n374cfc4.js:2:9650)
    at p (B:/~BUN/root/chunk-n374cfc4.js:2:9431)
    at ZJ (B:/~BUN/root/chunk-n374cfc4.js:2:11057)
    at vZ (B:/~BUN/root/chunk-n374cfc4.js:2:12168)
    at w (B:/~BUN/root/chunk-n374cfc4.js:2:11226)
    at yZ (B:/~BUN/root/chunk-n374cfc4.js:2:11863)
    at w (B:/~BUN/root/chunk-n374cfc4.js:2:11238)
    at <anonymous> (B:/~BUN/root/chunk-rsg7he52.js:2:32492)
    at emit (node:events:95:22)
    at insertText (B:/~BUN/root/chunk-ktc3gzhc.js:9:14462)
    at handleKeyPress (B:/~BUN/root/chunk-ktc3gzhc.js:9:11452)
    at <anonymous> (B:/~BUN/root/chunk-naqaftt1.js:72:63138)
    at emitWithPriority (B:/~BUN/root/chunk-naqaftt1.js:26:10570)
    at processParsedKey (B:/~BUN/root/chunk-naqaftt1.js:26:9634)
    at handleStdinEvent (B:/~BUN/root/chunk-naqaftt1.js:93:5055)
    at <anonymous> (B:/~BUN/root/chunk-naqaftt1.js:93:4924)
    at drain (B:/~BUN/root/chunk-naqaftt1.js:32:8396)
    at drainStdinParser (B:/~BUN/root/chunk-naqaftt1.js:93:4896)
    at <anonymous> (B:/~BUN/root/chunk-naqaftt1.js:93:2753)
    at emit (node:events:95:22)
    at addChunk (internal:streams/readable:264:47)
    at readableAddChunkPushByteMode (internal:streams/readable:242:18)
    at internalRead (native:38:40)
    at processTicksAndRejections (native:7:39)

Plugins

none

OpenCode version

1.18.11

Steps to reproduce

A theme file which does not have all the values set.
I create a theme file which has only 5 to 6 values set, but this resulted into this issue.
Once I asked LLM (grok 4.5) to update the full theme it worked fine.

Screenshot and/or share link

No response

Operating System

Windows 10.0.26200 (x64)

Terminal

Powershell