[NFC-ish] Fix some crashes from early Decl::dump()

Changes dump output used in one test; otherwise NFC.

Author: beccadax

lib/AST/ASTDumper.cpp

@@ -1383,9 +1383,13 @@ namespace {
           OS << "\")";
         });
       }
-      auto lifetimeString = getDumpString(VD->getLifetimeAnnotation());
-      if (!lifetimeString.empty())
-        printFlag(lifetimeString);
+      // In some cases, getLifetimeAnnotation() can fail before extension
+      // binding. hasResolvedImports() approximates an extension binding check.
+      if (VD->getModuleContext()->hasResolvedImports()) {
+        auto lifetimeString = getDumpString(VD->getLifetimeAnnotation());
+        if (!lifetimeString.empty())
+          printFlag(lifetimeString);
+      }
     }
 
     void printCommon(NominalTypeDecl *NTD, const char *Name, StringRef Label,
@@ -1905,8 +1909,13 @@ void swift::printContext(raw_ostream &os, DeclContext *dc) {
     break;
 
   case DeclContextKind::ExtensionDecl:
-    if (auto extendedNominal = cast<ExtensionDecl>(dc)->getExtendedNominal()) {
+    if (auto repr = cast<ExtensionDecl>(dc)->getExtendedTypeRepr()) {
+      repr->print(os);
+    } else if (cast<ExtensionDecl>(dc)->hasBeenBound()) {
+      auto extendedNominal = cast<ExtensionDecl>(dc)->getExtendedNominal();
       printName(os, extendedNominal->getName());
+    } else {
+      os << "<unbound>";
     }
     os << " extension";
     break;

test/type/parameterized_protocol.swift

@@ -1,7 +1,7 @@
 // RUN: %target-typecheck-verify-swift -disable-availability-checking
 
-// RUN: not %target-swift-frontend -typecheck %s -debug-generic-signatures -disable-availability-checking 2>&1 | %FileCheck %s
-
+// RUN: not %target-swift-frontend -typecheck %s -debug-generic-signatures -disable-availability-checking >%t.output 2>&1
+// RUN: %FileCheck --input-file %t.output %s
 
 /// Test some invalid syntax first
 
@@ -176,7 +176,7 @@ struct OpaqueTypes<E> {
 // CHECK: Generic signature: <Self where Self : Sequence, Self.[Sequence]Element == Int>
 extension Sequence<Int> {
 
-  // CHECK-LABEL: parameterized_protocol.(file).Sequence extension.doSomethingGeneric@
+  // CHECK-LABEL: parameterized_protocol.(file).Sequence<Int> extension.doSomethingGeneric@
   // CHECK: Generic signature: <Self, E where Self : Sequence, Self.[Sequence]Element == Int>
   func doSomethingGeneric<E>(_: E) {}
 }