293105 2025-05-15 23:10:01 -0700 Wasm module compile error when a function contains `try_table` after `return` 2025-05-16 14:49:47 -0700 1 1 1 Unclassified WebKit New Bugs Other PC Linux RESOLVED DUPLICATE 293106 P2 Normal --- 1 seyoon1705 webkit-unassigned oldest_to_newest 2117555 0 475261 seyoon1705 2025-05-15 23:10:01 -0700 Created attachment 475261 return_try_table.js Commit version: 9d02067f5de4b0402f58d6c83039e206439a8a8c System: Ubuntu 20.04.6 LTS, x86_64 The following Wasm module contains a function whose body is `return` and `try_table`. ``` ;; return_try_table.wat (module (func (return) (try_table)) ) ``` It is a valid Wasm module, so it must be succeed to parse and validate. However, when running `return_try_table.js`, the equivalent JavaScript file, JavaScriptCore raises compile error. ``` $ jsc return_try_table.js Exception: Error: Wasm validate failure module@return_try_table.js:17:20 global code@return_try_table.js:23:7 --> CompileError: WebAssembly.Module doesn't parse at byte 6: function body size doesn't match the expected size, in function at index 0 ``` 2117739 1 ap 2025-05-16 14:49:47 -0700 *** This bug has been marked as a duplicate of bug 293106 *** 475261 2025-05-15 23:10:01 -0700 2025-05-15 23:10:01 -0700 return_try_table.js return_try_table.js application/x-javascript 810 seyoon1705 J3VzZSBzdHJpY3QnOwoKZnVuY3Rpb24gbW9kdWxlKGJ5dGVzLCB2YWxpZCA9IHRydWUpIHsKICBs ZXQgYnVmZmVyID0gbmV3IEFycmF5QnVmZmVyKGJ5dGVzLmxlbmd0aCk7CiAgbGV0IHZpZXcgPSBu ZXcgVWludDhBcnJheShidWZmZXIpOwogIGZvciAobGV0IGkgPSAwOyBpIDwgYnl0ZXMubGVuZ3Ro OyArK2kpIHsKICAgIHZpZXdbaV0gPSBieXRlcy5jaGFyQ29kZUF0KGkpOwogIH0KICBsZXQgdmFs aWRhdGVkOwogIHRyeSB7CiAgICB2YWxpZGF0ZWQgPSBXZWJBc3NlbWJseS52YWxpZGF0ZShidWZm ZXIpOwogIH0gY2F0Y2ggKGUpIHsKICAgIHRocm93IG5ldyBFcnJvcigiV2FzbSB2YWxpZGF0ZSB0 aHJvd3MiKTsKICB9CiAgaWYgKHZhbGlkYXRlZCAhPT0gdmFsaWQpIHsKICAgIGlmICghdmFsaWRh dGVkKSBXZWJBc3NlbWJseS5jb21waWxlKGJ1ZmZlcikuY2F0Y2goZSA9PiBkZWJ1ZyhlKSk7CiAg ICB0aHJvdyBuZXcgRXJyb3IoIldhc20gdmFsaWRhdGUgZmFpbHVyZSIgKyAodmFsaWQgPyAiIiA6 ICIgZXhwZWN0ZWQiKSk7CiAgfQogIHJldHVybiBuZXcgV2ViQXNzZW1ibHkuTW9kdWxlKGJ1ZmZl cik7Cn0KCi8vIGJpbmFyeSBmb3JtYXQgb2YgcmV0dXJuX3RyeV90YWJsZS53YXQKbW9kdWxlKCJc eDAwXHg2MVx4NzNceDZkXHgwMVx4MDBceDAwXHgwMFx4MDFceDg0XHg4MFx4ODBceDgwXHgwMFx4 MDFceDYwXHgwMFx4MDBceDAzXHg4Mlx4ODBceDgwXHg4MFx4MDBceDAxXHgwMFx4MGFceDhkXHg4 MFx4ODBceDgwXHgwMFx4MDFceDg3XHg4MFx4ODBceDgwXHgwMFx4MDBceDBmXHgxZlx4NDBceDAw XHgwYlx4MGIiKTsK