1 files changed, 3 insertions, 0 deletions
diff --git a/src/wasm-validator.h b/src/wasm-validator.h
index 3c580ce51..bdc075946 100644
--- a/src/wasm-validator.h
+++ b/src/wasm-validator.h
@@ -46,6 +46,9 @@ public:
   bool validate(Module& module, bool validateWeb=false) {
     validateWebConstraints = validateWeb;
     walkModule(&module);
+    if (!valid) {
+      WasmPrinter::printModule(&module, std::cerr);
+    }
     return valid;
   }