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ignore Initial check if left of DestructuringAsignment (#20906)

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Wenlu Wang
2018-01-09 05:13:23 +08:00
committed by Mohamed Hegazy
parent 06c9a28b36
commit a82d1f8580
5 changed files with 40 additions and 1 deletions
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3
src/compiler/checker.ts
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@@ -13333,6 +13333,7 @@ namespace ts {
const declarationContainer = getControlFlowContainer(declaration);
let flowContainer = getControlFlowContainer(node);
const isOuterVariable = flowContainer !== declarationContainer;
const isSpreadDestructuringAsignmentTarget = node.parent && node.parent.parent && isSpreadAssignment(node.parent) && isDestructuringAssignmentTarget(node.parent.parent);
// When the control flow originates in a function expression or arrow function and we are referencing
// a const variable or parameter from an outer function, we extend the origin of the control flow
// analysis to include the immediately enclosing function.
@@ -13344,7 +13345,7 @@ namespace ts {
// We only look for uninitialized variables in strict null checking mode, and only when we can analyze
// the entire control flow graph from the variable's declaration (i.e. when the flow container and
// declaration container are the same).
const assumeInitialized = isParameter || isAlias || isOuterVariable ||
const assumeInitialized = isParameter || isAlias || isOuterVariable || isSpreadDestructuringAsignmentTarget ||
type !== autoType && type !== autoArrayType && (!strictNullChecks || (type.flags & TypeFlags.Any) !== 0 ||
isInTypeQuery(node) || node.parent.kind === SyntaxKind.ExportSpecifier) ||
node.parent.kind === SyntaxKind.NonNullExpression ||