Load and read PGF in test-web: doesn't fail but abstract name is empty

src/runtime/javascript/Dockerfile

@@ -41,6 +41,7 @@ RUN emcc .libs/libgu.a .libs/libpgf.a -o pgf.js \
         ccall,\
         FS,\
         getValue,\
+        AsciiToString,\
         stringToUTF8,\
         UTF8ToString,\
         allocateUTF8\

src/runtime/javascript/test-web.js

@@ -1,6 +1,19 @@
 Module.onRuntimeInitialized = () => {
     const JSPGF = mkAPI(Module);
 
+    fetch('Foods.pgf')
+      .then((response) => response.arrayBuffer())
+      .then((data) => {
+        const pgfPathFS = '/tmp/Foods.pgf';
+        Module.FS.writeFile(pgfPathFS, new DataView(data));
+
+        // Read PGF
+        const pgf = JSPGF.readPGF(pgfPathFS);
+
+        // Print its name
+        console.log(JSPGF.abstractName(pgf));
+      })
+    
     // Parse expression
     const expr = JSPGF.readExpr("Pred (Another (x f))");