Index: llvm/trunk/lib/MC/WasmObjectWriter.cpp
===================================================================
--- llvm/trunk/lib/MC/WasmObjectWriter.cpp
+++ llvm/trunk/lib/MC/WasmObjectWriter.cpp
@@ -1350,7 +1350,9 @@
         report_fatal_error(".size expression must be evaluatable");
 
       auto &DataSection = static_cast<MCSectionWasm &>(WS.getSection());
-      assert(DataSection.isWasmData());
+      if (!DataSection.isWasmData())
+        report_fatal_error("data symbols must live in a data section: " +
+                           WS.getName());
 
       // For each data symbol, export it in the symtab as a reference to the
       // corresponding Wasm data segment.
Index: llvm/trunk/test/MC/WebAssembly/data-symbol-in-text-section.ll
===================================================================
--- llvm/trunk/test/MC/WebAssembly/data-symbol-in-text-section.ll
+++ llvm/trunk/test/MC/WebAssembly/data-symbol-in-text-section.ll
@@ -0,0 +1,13 @@
+; RUN: not llc -filetype=obj %s -o /dev/null 2>&1 | FileCheck %s
+; CHECK: data symbols must live in a data section: data_symbol
+
+target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
+target triple = "wasm32-unknown-unknown"
+
+@data_symbol = constant [1024 x i32] zeroinitializer, section ".text", align 16
+
+define hidden i32 @main() local_unnamed_addr #0 {
+entry:
+  %0 = load i32, i32* getelementptr inbounds ([1024 x i32], [1024 x i32]* @data_symbol, i32 0, i32 10)
+  ret i32 %0
+}