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auto merge of #8550 : kballard/rust/token-start-err-msg, r=catamorphism

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The span was fixed at some point to point to the correct character, but
the error message is still bad. Update it to emit the actual character
in question (potentially escaped).

Fixes #3747.
This commit is contained in:
bors 2013-08-18 02:51:59 -07:00
commit 600901152c
1 changed files with 3 additions and 1 deletions
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4
src/libsyntax/parse/lexer.rs
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@ -782,7 +782,9 @@ fn next_token_inner(rdr: @mut StringReader) -> token::Token {
c => {
// So the error span points to the unrecognized character
rdr.peek_span = codemap::mk_sp(rdr.last_pos, rdr.pos);
rdr.fatal(fmt!("unknown start of token: %d", c as int));
let mut cs = ~"";
char::escape_default(c, |c| cs.push_char(c));
rdr.fatal(fmt!("unknown start of token: %s", cs));
}
}
}