SILGen: Fix crash when immediately-applied closure transitively captures generic parameters

Author: slavapestov

lib/SILGen/SILGenApply.cpp

@@ -1163,15 +1163,16 @@ class SILGenApply : public Lowering::ExprVisitor<SILGenApply> {
     // really producing a closure object.
     SILDeclRef constant(e);
 
+    auto captureInfo = SGF.SGM.M.Types.getLoweredLocalCaptures(e);
+
     SubstitutionMap subs;
-    if (e->getCaptureInfo().hasGenericParamCaptures())
+    if (captureInfo.hasGenericParamCaptures())
       subs = SGF.getForwardingSubstitutionMap();
 
     setCallee(Callee::forDirect(SGF, constant, subs, e));
 
     // If the closure requires captures, emit them.
-    bool hasCaptures = SGF.SGM.M.Types.hasLoweredLocalCaptures(e);
-    if (hasCaptures) {
+    if (!captureInfo.getCaptures().empty()) {
       SmallVector<ManagedValue, 4> captures;
       SGF.emitCaptures(e, e, CaptureEmission::ImmediateApplication,
                        captures);

test/SILGen/default_arguments_generic.swift

@@ -83,4 +83,12 @@ func f<T : StaticIntValue>(_: T) {
 
   // CHECK-LABEL: sil private [ossa] @$s25default_arguments_generic1fyyxAA14StaticIntValueRzlF5otherL_yyAaCRzlF : $@convention(thin) <T where T : StaticIntValue> () -> ()
   func other() { inner() }
-}
+}
+
+func g<T>(_: T) {
+  { inner() }()
+
+  func inner() {
+    _ = T.self
+  }
+}