4 files changed, 9 insertions, 4 deletions
diff --git a/src/binaryen-c.cpp b/src/binaryen-c.cpp
index 583f64094..ecb70bc1b 100644
--- a/src/binaryen-c.cpp
+++ b/src/binaryen-c.cpp
@@ -416,7 +416,9 @@ BinaryenModuleRef BinaryenModuleRead(char* input, size_t inputSize) {
   std::vector<char> buffer(false);
   buffer.resize(inputSize);
   std::copy_n(input, inputSize, buffer.begin());
-  WasmBinaryBuilder parser(*wasm, buffer, false);
+  WasmBinaryBuilder parser(*wasm, buffer, []() {
+    Fatal() << "error in parsing wasm binary";
+  }, false);
   parser.read();
   return wasm;
 }
diff --git a/src/wasm-binary.h b/src/wasm-binary.h
index c889f1418..4670c9de3 100644
--- a/src/wasm-binary.h
+++ b/src/wasm-binary.h
@@ -1164,13 +1164,14 @@ class WasmBinaryBuilder {
   Module& wasm;
   MixedArena& allocator;
   std::vector<char>& input;
+  std::function<void ()> onError;
   bool debug;
 
   size_t pos = 0;
   int32_t startIndex = -1;
 
 public:
-  WasmBinaryBuilder(Module& wasm, std::vector<char>& input, bool debug) : wasm(wasm), allocator(wasm.allocator), input(input), debug(debug) {}
+  WasmBinaryBuilder(Module& wasm, std::vector<char>& input, std::function<void ()> onError, bool debug) : wasm(wasm), allocator(wasm.allocator), input(input), onError(onError), debug(debug) {}
 
   void read() {
 
diff --git a/src/wasm-dis.cpp b/src/wasm-dis.cpp
index e2e103b46..94965518c 100644
--- a/src/wasm-dis.cpp
+++ b/src/wasm-dis.cpp
@@ -45,7 +45,9 @@ int main(int argc, const char *argv[]) {
 
   if (options.debug) std::cerr << "parsing binary..." << std::endl;
   Module wasm;
-  WasmBinaryBuilder parser(wasm, input, options.debug);
+  WasmBinaryBuilder parser(wasm, input, []() {
+    Fatal() << "error in parsing wasm binary";
+  }, options.debug);
   parser.read();
 
   if (options.debug) std::cerr << "Printing..." << std::endl;
diff --git a/src/wasm-s-parser.h b/src/wasm-s-parser.h
index 73421e773..4b27918d3 100644
--- a/src/wasm-s-parser.h
+++ b/src/wasm-s-parser.h
@@ -259,7 +259,7 @@ public:
           stringToBinary(str, size, data);
         }
       }
-      WasmBinaryBuilder binaryBuilder(wasm, data, false);
+      WasmBinaryBuilder binaryBuilder(wasm, data, onError, false);
       binaryBuilder.read();
       return;
     }