Merge pull request #3555 from tinganho/typepredicateBug

Fixes type predicate crash bug
2026-05-16 07:13:45 -05:00 · 2015-06-18 14:09:16 -07:00
parent dd671ed431 84bb38415f
commit 3cb44fbd7d
4 changed files with 70 additions and 28 deletions
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -5765,6 +5765,7 @@ namespace ts {
                let signature = getResolvedSignature(expr);

                if (signature.typePredicate &&
+                    expr.arguments[signature.typePredicate.parameterIndex] &&
                    getSymbolAtLocation(expr.arguments[signature.typePredicate.parameterIndex]) === symbol) {

                    if (!assumeTrue) {