Fix converge option

src/module.ts

@@ -1629,7 +1629,7 @@ export class Module {
     binaryen._BinaryenModuleInterpret(this.ref);
   }
 
-  toBinary(sourceMapUrl: string | null): BinaryModule {
+  toBinary(sourceMapUrl: string | null = null): BinaryModule {
     var out = this.lit; // safe to reuse as long as..
     assert(binaryen._BinaryenSizeofLiteral() >= 12);
     var cStr = allocString(sourceMapUrl);
@@ -1642,7 +1642,7 @@ export class Module {
     var ret = new BinaryModule();
     ret.output = readBuffer(binaryPtr, binaryLen);
     ret.sourceMap = readString(sourceMapPtr);
-    binaryen._free(cStr);
+    if (cStr) binaryen._free(cStr);
     binaryen._free(binaryPtr);
     if (sourceMapPtr) binaryen._free(sourceMapPtr);
     return ret;

tests/compiler/converge.json

@@ -0,0 +1,6 @@
+{
+  "asc_flags": [
+    "--runtime none",
+    "--converge"
+  ]
+}

tests/compiler/converge.optimized.wat

@@ -0,0 +1,9 @@
+(module
+ (type $none_=>_none (func))
+ (memory $0 0)
+ (export "memory" (memory $0))
+ (export "test" (func $converge/test))
+ (func $converge/test
+  nop
+ )
+)

tests/compiler/converge.ts

@@ -0,0 +1 @@
+export function test(): void {}

tests/compiler/converge.untouched.wat

@@ -0,0 +1,10 @@
+(module
+ (type $none_=>_none (func))
+ (memory $0 0)
+ (table $0 1 funcref)
+ (export "memory" (memory $0))
+ (export "test" (func $converge/test))
+ (func $converge/test
+  nop
+ )
+)