angular__angular

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Matthew Beck 8d6c925392 fix(compiler-cli): record class extends clause references in DeferredSymbolTracker

`DeferredSymbolTracker.lookupIdentifiersInSourceFile` prunes `ts.isTypeNode`
subtrees so that references appearing exclusively inside type annotations
do not keep static import declarations in the emitted JavaScript.

However, `ts.isTypeNode` returns `true` for `ts.ExpressionWithTypeArguments`,
which TypeScript uses to represent both `extends` and `implements` heritage
clauses. An `extends` clause on a class declaration or class expression is a
value position that survives in the emitted JavaScript output.

Because `isTypeNode` returned `true`, references to base classes imported
alongside deferred dependencies were ignored. As a result, the compiler
erroneously marked the static import statement as deferrable and deleted it
from the emitted JavaScript, leaving the `extends <Base>` clause referencing
an undeclared identifier and causing a runtime `ReferenceError`.

This commit ensures that `ExpressionWithTypeArguments` under a class `extends`
clause is not treated as an erasable type node, preserving the static import
whenever a base class is referenced.

2026-08-07 16:10:41 -07:00