Index: clang/lib/Format/UnwrappedLineParser.cpp
===================================================================
--- clang/lib/Format/UnwrappedLineParser.cpp
+++ clang/lib/Format/UnwrappedLineParser.cpp
@@ -1798,12 +1798,18 @@
       break;
     case tok::caret:
       nextToken();
+      // Block return type.
       if (FormatTok->Tok.isAnyIdentifier() ||
           FormatTok->isSimpleTypeSpecifier()) {
         nextToken();
+        // Return types: pointers are ok too.
+        while (FormatTok->is(tok::star))
+          nextToken();
       }
+      // Block argument list.
       if (FormatTok->is(tok::l_paren))
         parseParens();
+      // Block body.
       if (FormatTok->is(tok::l_brace))
         parseChildBlock();
       break;
Index: clang/unittests/Format/FormatTest.cpp
===================================================================
--- clang/unittests/Format/FormatTest.cpp
+++ clang/unittests/Format/FormatTest.cpp
@@ -22619,7 +22619,8 @@
                "    }\n"
                "  }\n"
                "});");
-  verifyFormat("Block b = ^int *(A *a, B *b) {}");
+  verifyFormat("Block b = ^int *(A *a, B *b) {\n"
+               "};");
   verifyFormat("BOOL (^aaa)(void) = ^BOOL {\n"
                "};");
 
Index: clang/unittests/Format/FormatTestObjC.cpp
===================================================================
--- clang/unittests/Format/FormatTestObjC.cpp
+++ clang/unittests/Format/FormatTestObjC.cpp
@@ -1019,6 +1019,20 @@
   verifyFormat("int (^foo[kNumEntries])(char, float);");
   verifyFormat("int (^foo[kNumEntries + 10])(char, float);");
   verifyFormat("int (^foo[(kNumEntries + 10)])(char, float);");
+
+  verifyFormat("int *p = ^int *() { //\n"
+               "  return nullptr;\n"
+               "}();");
+
+  verifyFormat("int * (^p)(void) = ^int *(void) { //\n"
+               "  return nullptr;\n"
+               "};");
+
+  // WebKit forces function braces onto a newline, but blocks should not.
+  verifyFormat("int* p = ^int*() { //\n"
+               "    return nullptr;\n"
+               "}();",
+               getWebKitStyle());
 }
 
 TEST_F(FormatTestObjC, ObjCSnippets) {