[DeclChecker] Explicitly compute captures for local functions in the decl

checker.

Author: hborla

lib/Sema/TypeCheckDeclPrimary.cpp

@@ -2362,6 +2362,7 @@ class DeclChecker : public DeclVisitor<DeclChecker> {
     } else if (FD->getDeclContext()->isLocalContext()) {
       // Check local function bodies right away.
       (void)FD->getTypecheckedBody();
+      TypeChecker::computeCaptures(FD);
     } else if (shouldSkipBodyTypechecking(FD)) {
       FD->setBodySkipped(FD->getBodySourceRange());
     } else {