diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl.cpp b/compiler-rt/lib/tsan/rtl/tsan_rtl.cpp
--- a/compiler-rt/lib/tsan/rtl/tsan_rtl.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_rtl.cpp
@@ -201,7 +201,6 @@
   auto shadow_end = ShadowEnd();
 #if SANITIZER_GO
   CHECK_NE(0, ctx->mapped_shadow_begin);
-  shadow_begin = ctx->mapped_shadow_begin;
   shadow_end = ctx->mapped_shadow_end;
   VPrintf(2, "shadow_begin-shadow_end: (0x%zx-0x%zx)\n",
           shadow_begin, shadow_end);