Improve parsing error messages #405
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- output more informative error messages in `js_parse_expect`.
The previous code was bogus:
```
return js_parse_error(s, "expecting '%c'", tok);
```
this was causing a bug on `eval("do;")` where `tok` is `TOK_WHILE` (-70, 0xBA)
creating an invalid UTF-8 encoding (lone trailing byte).
This would ultimately have caused a failure in `JS_ThrowError2` if `JS_NewString`
failed when converting an error to a string if the conversion detects invalid
UTF-8 encoding and throws an error (it currently does not, but should).
- test for `JS_NewString` failure in `JS_ThrowError2`
- test for `JS_FreeCString` failure in run-test262.c
- add more test cases
saghul
approved these changes
May 14, 2024
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js_parse_expect.The previous code was bogus:
this was causing a bug on
eval("do;")wheretokisTOK_WHILE(-70, 0xBA) creating an invalid UTF-8 encoding (lone trailing byte). This would ultimately have caused a failure inJS_ThrowError2ifJS_NewStringfailed when converting an error to a string if the conversion detects invalid UTF-8 encoding and throws an error (it currently does not, but should).JS_NewStringfailure inJS_ThrowError2JS_FreeCStringfailure in run-test262.c