Index: lib/asan/asan_internal.h
===================================================================
--- lib/asan/asan_internal.h
+++ lib/asan/asan_internal.h
@@ -137,7 +137,6 @@
 const int kAsanStackLeftRedzoneMagic = 0xf1;
 const int kAsanStackMidRedzoneMagic = 0xf2;
 const int kAsanStackRightRedzoneMagic = 0xf3;
-const int kAsanStackPartialRedzoneMagic = 0xf4;
 const int kAsanStackAfterReturnMagic = 0xf5;
 const int kAsanInitializationOrderMagic = 0xf6;
 const int kAsanUserPoisonedMemoryMagic = 0xf7;
Index: lib/asan/asan_report.cc
===================================================================
--- lib/asan/asan_report.cc
+++ lib/asan/asan_report.cc
@@ -88,7 +88,6 @@
       case kAsanStackLeftRedzoneMagic:
       case kAsanStackMidRedzoneMagic:
       case kAsanStackRightRedzoneMagic:
-      case kAsanStackPartialRedzoneMagic:
         return Red();
       case kAsanStackAfterReturnMagic:
         return Magenta();
@@ -166,8 +165,6 @@
                   kAsanStackMidRedzoneMagic);
   PrintShadowByte(str, "  Stack right redzone:     ",
                   kAsanStackRightRedzoneMagic);
-  PrintShadowByte(str, "  Stack partial redzone:   ",
-                  kAsanStackPartialRedzoneMagic);
   PrintShadowByte(str, "  Stack after return:      ",
                   kAsanStackAfterReturnMagic);
   PrintShadowByte(str, "  Stack use after scope:   ",
@@ -1105,7 +1102,6 @@
         break;
       case kAsanStackMidRedzoneMagic:
       case kAsanStackRightRedzoneMagic:
-      case kAsanStackPartialRedzoneMagic:
         bug_descr = "stack-buffer-overflow";
         bug_type_score = 25;
         far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);