comiler errors handled

test/multiplier2.js

@@ -9,10 +9,10 @@ const Fr = new F1Field(exports.p);
 
 const assert = chai.assert;
 
-describe("Exponentioation test", function () {
+describe("Simple test", function () {
     this.timeout(100000);
 
-    it("Should generate the Exponentiation table in k=0", async () => {
+    it("Checking the compilation of simple circuit", async () => {
 
         const circuit = await wasm_tester(path.join(__dirname, "Multiplier2.circom"));
         const w = await circuit.calculateWitness({a: 2, b: 4});

wasm/tester.js

@@ -52,7 +52,9 @@ async function compile (fileName, options) {
     if (options.json) flags += "--json ";
     if (options.output) flags += "--output " + options.output + " ";
     
-    await exec("circom " + flags + fileName);
+    b = await exec("circom " + flags + fileName);
+    assert(b.stderr == "",
+	  "circom compiler error \n" + b.stderr);
 }
     
 class WasmTester {