Fix an assert in -Wquoted-include-in-framework-header

Fixes rdar://43692300

Differential revision: https://reviews.llvm.org/D52253

llvm-svn: 342679

clang/lib/Lex/HeaderSearch.cpp

@@ -648,7 +648,7 @@ static bool isFrameworkStylePath(StringRef Path, bool &IsPrivateHeader,
     ++I;
   }
 
-  return FoundComp >= 2;
+  return !FrameworkName.empty() && FoundComp >= 2;
 }
 
 static void

clang/test/Modules/Inputs/double-quotes/NotAFramework/Headers/Headers/Thing1.h

@@ -0,0 +1 @@
+#include "Thing2.h"

clang/test/Modules/Inputs/double-quotes/NotAFramework/Headers/Headers/Thing2.h

@@ -0,0 +1 @@
+// Empty file!

clang/test/Modules/double-quotes.m

@@ -32,6 +32,9 @@
 #import "A.h"
 #import <Z/Z.h>
 
+// Make sure we correctly handle paths that resemble frameworks, but aren't.
+#import "NotAFramework/Headers/Headers/Thing1.h"
+
 int bar() { return foo(); }
 
 // expected-warning@Inputs/double-quotes/A.framework/Headers/A.h:1{{double-quoted include "A0.h" in framework header, expected angle-bracketed instead}}