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Reject incomplete type arguments during expression speculation - #65510

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magic-akari wants to merge 2 commits into
microsoft:mainfrom
magic-akari:fix/type-argument-speculation
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magic-akari wants to merge 2 commits into
microsoft:mainfrom
magic-akari:fix/type-argument-speculation

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@magic-akari

@magic-akari magic-akari commented Nov 15, 2026 •

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Propagate structural failures during speculative type parsing while preserving recoverable diagnostics on recognized types. This lets typed arrows and nested relational expressions fall back to expression parsing.

Add TS/TSX compiler baselines and focused parser state rollback tests.

Propagate structural failures during speculative type parsing while
preserving recoverable diagnostics on recognized types. This lets typed
arrows and nested relational expressions fall back to expression parsing.

Add TS/TSX compiler baselines and focused parser state rollback tests.
@typescript-automation typescript-automation Bot added the For Backlog Bug PRs that fix a backlog bug label Nov 15, 2026
@typescript-automation typescript-automation Bot added the For Milestone Bug PRs that fix a bug with a specific milestone label Nov 15, 2026

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