[dajiaohuang]

Summary

• Restore the selection range-list attachment and virtual-selection flag in a finally block when moving selected lines raises.
• Add a regression test that injects a synthetic session-change listener error and verifies the editor state is restored.

Validation

• npm test -- --reporter dot (1501 passing, 3 pending)
• npx eslint src/editor.js src/multi_select_test.js
• git diff --check

Addresses the state-corruption case described in #5996.

Open kitchen-sink @ 3b7c7e8dd6b77e4a2fe0f5cc8893e045ab7ed713

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.90%. Comparing base (68d7fd1) to head (3b7c7e8).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6017      +/-   ##
==========================================
- Coverage   93.91%   93.90%   -0.02%     
==========================================
  Files         647      647              
  Lines      140868   140889      +21     
  Branches    14772    14777       +5     
==========================================
- Hits       132303   132295       -8     
- Misses       8565     8594      +29     

Flag	Coverage Δ
unittests	93.90% <100.00%> (-0.02%)	⬇️

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