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Fix bug where set would sometimes fail within if

Fix bug where set would sometimes fail within if: a task in repo2rlenv-commit-runtime-v2 (Harbor dataset). Title: Variable set inside all three branches of an if/else-if/else block is incorrectly set to undefined

The task

**Title:** Variable set inside all three branches of an if/else-if/else block is incorrectly set to `undefined`

Part of FineEnvs/repo2rlenv-commit-runtime.