diff --git a/front_end/third_party/wasmparser/WasmDis.js b/front_end/third_party/wasmparser/WasmDis.js
index f2f196b3df..b0a93a0660 100644
--- a/front_end/third_party/wasmparser/WasmDis.js
+++ b/front_end/third_party/wasmparser/WasmDis.js
@@ -503,10 +503,12 @@ export class WasmDisassembler {
                 }
                 break;
             case 16 /* call */:
+            case 18 /* return_call */:
                 var funcName = this._nameResolver.getFunctionName(operator.funcIndex, operator.funcIndex < this._importCount, true);
                 this.appendBuffer(` ${funcName}`);
                 break;
             case 17 /* call_indirect */:
+            case 19 /* return_call_indirect */:
                 var typeName = this._nameResolver.getTypeName(operator.typeIndex, true);
                 this.appendBuffer(` (type ${typeName})`);
                 break;
diff --git a/front_end/third_party/wasmparser/WasmParser.js b/front_end/third_party/wasmparser/WasmParser.js
index b910bc2550..2e94c14bb8 100644
--- a/front_end/third_party/wasmparser/WasmParser.js
+++ b/front_end/third_party/wasmparser/WasmParser.js
@@ -47,6 +47,8 @@ export var OperatorCode;
     OperatorCode[OperatorCode["return"] = 15] = "return";
     OperatorCode[OperatorCode["call"] = 16] = "call";
     OperatorCode[OperatorCode["call_indirect"] = 17] = "call_indirect";
+    OperatorCode[OperatorCode["return_call"] = 18] = "return_call";
+    OperatorCode[OperatorCode["return_call_indirect"] = 19] = "return_call_indirect";
     OperatorCode[OperatorCode["drop"] = 26] = "drop";
     OperatorCode[OperatorCode["select"] = 27] = "select";
     OperatorCode[OperatorCode["get_local"] = 32] = "get_local";
@@ -446,7 +448,7 @@ export var OperatorCode;
 })(OperatorCode || (OperatorCode = {}));
 ;
 export const OperatorCodeNames = [
-    "unreachable", "nop", "block", "loop", "if", "else", undefined, undefined, undefined, undefined, undefined, "end", "br", "br_if", "br_table", "return", "call", "call_indirect", undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, "drop", "select", undefined, undefined, undefined, undefined, "get_local", "set_local", "tee_local", "get_global", "set_global", "table.get", "table.set", undefined, "i32.load", "i64.load", "f32.load", "f64.load", "i32.load8_s", "i32.load8_u", "i32.load16_s", "i32.load16_u", "i64.load8_s", "i64.load8_u", "i64.load16_s", "i64.load16_u", "i64.load32_s", "i64.load32_u", "i32.store", "i64.store", "f32.store", "f64.store", "i32.store8", "i32.store16", "i64.store8", "i64.store16", "i64.store32", "current_memory", "grow_memory", "i32.const", "i64.const", "f32.const", "f64.const", "i32.eqz", "i32.eq", "i32.ne", "i32.lt_s", "i32.lt_u", "i32.gt_s", "i32.gt_u", "i32.le_s", "i32.le_u", "i32.ge_s", "i32.ge_u", "i64.eqz", "i64.eq", "i64.ne", "i64.lt_s", "i64.lt_u", "i64.gt_s", "i64.gt_u", "i64.le_s", "i64.le_u", "i64.ge_s", "i64.ge_u", "f32.eq", "f32.ne", "f32.lt", "f32.gt", "f32.le", "f32.ge", "f64.eq", "f64.ne", "f64.lt", "f64.gt", "f64.le", "f64.ge", "i32.clz", "i32.ctz", "i32.popcnt", "i32.add", "i32.sub", "i32.mul", "i32.div_s", "i32.div_u", "i32.rem_s", "i32.rem_u", "i32.and", "i32.or", "i32.xor", "i32.shl", "i32.shr_s", "i32.shr_u", "i32.rotl", "i32.rotr", "i64.clz", "i64.ctz", "i64.popcnt", "i64.add", "i64.sub", "i64.mul", "i64.div_s", "i64.div_u", "i64.rem_s", "i64.rem_u", "i64.and", "i64.or", "i64.xor", "i64.shl", "i64.shr_s", "i64.shr_u", "i64.rotl", "i64.rotr", "f32.abs", "f32.neg", "f32.ceil", "f32.floor", "f32.trunc", "f32.nearest", "f32.sqrt", "f32.add", "f32.sub", "f32.mul", "f32.div", "f32.min", "f32.max", "f32.copysign", "f64.abs", "f64.neg", "f64.ceil", "f64.floor", "f64.trunc", "f64.nearest", "f64.sqrt", "f64.add", "f64.sub", "f64.mul", "f64.div", "f64.min", "f64.max", "f64.copysign", "i32.wrap/i64", "i32.trunc_s/f32", "i32.trunc_u/f32", "i32.trunc_s/f64", "i32.trunc_u/f64", "i64.extend_s/i32", "i64.extend_u/i32", "i64.trunc_s/f32", "i64.trunc_u/f32", "i64.trunc_s/f64", "i64.trunc_u/f64", "f32.convert_s/i32", "f32.convert_u/i32", "f32.convert_s/i64", "f32.convert_u/i64", "f32.demote/f64", "f64.convert_s/i32", "f64.convert_u/i32", "f64.convert_s/i64", "f64.convert_u/i64", "f64.promote/f32", "i32.reinterpret/f32", "i64.reinterpret/f64", "f32.reinterpret/i32", "f64.reinterpret/i64", "i32.extend8_s", "i32.extend16_s", "i64.extend8_s", "i64.extend16_s", "i64.extend32_s", undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, "ref.null", "ref.is_null", "ref.func", undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined
+    "unreachable", "nop", "block", "loop", "if", "else", undefined, undefined, undefined, undefined, undefined, "end", "br", "br_if", "br_table", "return", "call", "call_indirect", "return_call", "return_call_indirect", undefined, undefined, undefined, undefined, undefined, undefined, "drop", "select", undefined, undefined, undefined, undefined, "get_local", "set_local", "tee_local", "get_global", "set_global", "table.get", "table.set", undefined, "i32.load", "i64.load", "f32.load", "f64.load", "i32.load8_s", "i32.load8_u", "i32.load16_s", "i32.load16_u", "i64.load8_s", "i64.load8_u", "i64.load16_s", "i64.load16_u", "i64.load32_s", "i64.load32_u", "i32.store", "i64.store", "f32.store", "f64.store", "i32.store8", "i32.store16", "i64.store8", "i64.store16", "i64.store32", "current_memory", "grow_memory", "i32.const", "i64.const", "f32.const", "f64.const", "i32.eqz", "i32.eq", "i32.ne", "i32.lt_s", "i32.lt_u", "i32.gt_s", "i32.gt_u", "i32.le_s", "i32.le_u", "i32.ge_s", "i32.ge_u", "i64.eqz", "i64.eq", "i64.ne", "i64.lt_s", "i64.lt_u", "i64.gt_s", "i64.gt_u", "i64.le_s", "i64.le_u", "i64.ge_s", "i64.ge_u", "f32.eq", "f32.ne", "f32.lt", "f32.gt", "f32.le", "f32.ge", "f64.eq", "f64.ne", "f64.lt", "f64.gt", "f64.le", "f64.ge", "i32.clz", "i32.ctz", "i32.popcnt", "i32.add", "i32.sub", "i32.mul", "i32.div_s", "i32.div_u", "i32.rem_s", "i32.rem_u", "i32.and", "i32.or", "i32.xor", "i32.shl", "i32.shr_s", "i32.shr_u", "i32.rotl", "i32.rotr", "i64.clz", "i64.ctz", "i64.popcnt", "i64.add", "i64.sub", "i64.mul", "i64.div_s", "i64.div_u", "i64.rem_s", "i64.rem_u", "i64.and", "i64.or", "i64.xor", "i64.shl", "i64.shr_s", "i64.shr_u", "i64.rotl", "i64.rotr", "f32.abs", "f32.neg", "f32.ceil", "f32.floor", "f32.trunc", "f32.nearest", "f32.sqrt", "f32.add", "f32.sub", "f32.mul", "f32.div", "f32.min", "f32.max", "f32.copysign", "f64.abs", "f64.neg", "f64.ceil", "f64.floor", "f64.trunc", "f64.nearest", "f64.sqrt", "f64.add", "f64.sub", "f64.mul", "f64.div", "f64.min", "f64.max", "f64.copysign", "i32.wrap/i64", "i32.trunc_s/f32", "i32.trunc_u/f32", "i32.trunc_s/f64", "i32.trunc_u/f64", "i64.extend_s/i32", "i64.extend_u/i32", "i64.trunc_s/f32", "i64.trunc_u/f32", "i64.trunc_s/f64", "i64.trunc_u/f64", "f32.convert_s/i32", "f32.convert_u/i32", "f32.convert_s/i64", "f32.convert_u/i64", "f32.demote/f64", "f64.convert_s/i32", "f64.convert_u/i32", "f64.convert_s/i64", "f64.convert_u/i64", "f64.promote/f32", "i32.reinterpret/f32", "i64.reinterpret/f64", "f32.reinterpret/i32", "f64.reinterpret/i64", "i32.extend8_s", "i32.extend16_s", "i64.extend8_s", "i64.extend16_s", "i64.extend32_s", undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, "ref.null", "ref.is_null", "ref.func", undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined
 ];
 ["i32.trunc_s:sat/f32", "i32.trunc_u:sat/f32", "i32.trunc_s:sat/f64", "i32.trunc_u:sat/f64", "i64.trunc_s:sat/f32", "i64.trunc_u:sat/f32", "i64.trunc_s:sat/f64", "i64.trunc_u:sat/f64", "memory.init", "data.drop", "memory.copy", "memory.fill", "table.init", "elem.drop", "table.copy", "table.grow", "table.size", "table.fill"].forEach((s, i) => {
     OperatorCodeNames[0xfc00 | i] = s;
@@ -1596,10 +1598,12 @@ export class BinaryReader {
                 }
                 break;
             case 16 /* call */:
+            case 18 /* return_call */:
             case 210 /* ref_func */:
                 funcIndex = this.readVarUint32() >>> 0;
                 break;
             case 17 /* call_indirect */:
+            case 19 /* return_call_indirect */:
                 typeIndex = this.readVarUint32() >>> 0;
                 reserved = this.readVarUint1();
                 break;