Fix JSON parsing failure

src/javascript/jsc/bindings/bindings.cpp

@@ -249,7 +249,14 @@ unsigned char JSC__JSValue__jsType(JSC__JSValue JSValue0)
 JSC__JSValue JSC__JSValue__parseJSON(JSC__JSValue JSValue0, JSC__JSGlobalObject* arg1)
 {
     JSC::JSValue jsValue = JSC::JSValue::decode(JSValue0);
-    return JSC::JSValue::encode(JSC::JSONParse(arg1, jsValue.toWTFString(arg1)));
+
+    JSC::JSValue result = JSC::JSONParse(arg1, jsValue.toWTFString(arg1));
+
+    if (!result) {
+        result = JSC::JSValue(JSC::createSyntaxError(arg1->globalObject(), "Failed to parse JSON"));
+    }
+
+    return JSC::JSValue::encode(result);
 }
 
 void JSC__JSGlobalObject__deleteModuleRegistryEntry(JSC__JSGlobalObject* global, ZigString* arg1)

src/javascript/jsc/bindings/bindings.zig

@@ -2007,6 +2007,13 @@ pub const JSValue = enum(u64) {
             else => false,
         };
     }
+    /// Empty as in "JSValue {}" rather than an empty string
+    pub fn isEmpty(this: JSValue) bool {
+        return switch (@enumToInt(this)) {
+            0 => true,
+            else => false,
+        };
+    }
     pub fn isBoolean(this: JSValue) bool {
         return cppFn("isBoolean", .{this});
     }

src/javascript/jsc/webcore/response.zig

@@ -1708,6 +1708,9 @@ pub const Blob = struct {
         value: JSC.JSValue,
         global: *JSGlobalObject,
     ) JSC.JSValue {
+        if (value.isError()) {
+            return JSC.JSPromise.rejectedPromiseValue(global, value);
+        }
         return JSC.JSPromise.resolvedPromiseValue(global, value);
     }