Merge pull request swiftlang#28949 from rintaro/ide-completion-rdar52105899

[CodeCompletion] Evaluate 'PatternBindingEntryRequest' before checking the init

Author: rintaro

lib/Sema/TypeChecker.cpp

@@ -575,6 +575,8 @@ void swift::typeCheckPatternBinding(PatternBindingDecl *PBD,
   auto &Ctx = PBD->getASTContext();
   DiagnosticSuppression suppression(Ctx.Diags);
   (void)createTypeChecker(Ctx);
+  (void)evaluateOrDefault(
+      Ctx.evaluator, PatternBindingEntryRequest{PBD, bindingIndex}, nullptr);
   TypeChecker::typeCheckPatternBinding(PBD, bindingIndex);
 }
 

validation-test/IDE/crashers_2_fixed/rdar52105899.swift

@@ -0,0 +1,10 @@
+// RUN: %empty-directory(%t)
+// RUN: echo '//DUMMY' > %t/dummy.swift
+// RUN: %target-swift-ide-test -code-completion -code-completion-token=A -source-filename=%s %t/dummy.swift > /dev/null
+// RUN: %target-swift-ide-test -code-completion -code-completion-token=B -source-filename=%s %t/dummy.swift > /dev/null
+
+struct MyStruct {
+  let _: Int = #^A^#
+}
+
+let _: Int = #^B^#