panic on `CREATE TABLE L(x)L`

[MarinPostma]

The following input causes a panic: CREATE TABLE L(x)L

Not sure what to do about this one, it hits an unreachable statement in parse.rs:

    fn yy222(self) -> Name {
        if let YYMINORTYPE::yy222(v) = self.minor {
            v
        } else {
            unreachable!()
        }
    }

I have many more inputs that trigger that as well, but they all are relatively similar to that one.

[MarinPostma]

alright I found it, in parse.y, this bit:

table_option(A) ::= nm(X). {
  if "strict".eq_ignore_ascii_case(&X.0) {
    A = TableOptions::STRICT;
  }else{
    A = TableOptions::NONE;
    let msg = format!("unknown table option: {}", &X);
    self.ctx.sqlite3_error_msg(&msg);
  }
}

generates:

//line 161 "src/parser/parse.y"
{
  if "strict".eq_ignore_ascii_case(&self.yy_move(0).yy222().0) {
    yylhsminor = YYMINORTYPE::yy201( TableOptions::STRICT);
  }else{
    yylhsminor = YYMINORTYPE::yy201( TableOptions::NONE);
    let msg = format!("unknown table option: {}", &self.yy_move(0).yy222());
    self.ctx.sqlite3_error_msg(&msg);
  }
}

but the call to yy222 consumes self. on the subsequent call to create the error message, the content of the name was already taken from self.minor, and it blows up.

changing the rule to:

table_option(A) ::= nm(X). {
  let name = X;
  if "strict".eq_ignore_ascii_case(&name.0) {
    A = TableOptions::STRICT;
  }else{
    A = TableOptions::NONE;
    let msg = format!("unknown table option: {name}");
    self.ctx.sqlite3_error_msg(&msg);
  }
}

it doesn't panic anymore, but doesn't return an error either. Still investigating.

[gwenn]

Indeed, in one action, we are supposed to consume entry once.

[MarinPostma]

I fixed it by immediately returning a ParseError after self.ctx.sqlite3_error_msg(&msg);, now it returns an error as expected. LMK if you are interested in these fixes!

[gwenn]

I've reapplied your fix here: https://github.com/gwenn/lemon-rs/pull/46/commits/a7cd0c1dbb2da8730dda5e9f01917dc17776b1fd And I am going to fix all usages of sqlite3_error_msg. Thanks for all your feedback.