---

yaml
---
r: 14173
b: refs/heads/try
c: a681628
h: refs/heads/master
i:
  14171: 851c230
v: v3

Author: marijnh

[refs]

@@ -2,5 +2,5 @@
 refs/heads/master: 61b1875c16de39c166b0f4d54bba19f9c6777d1a
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 4a81779abd786ff22d71434c6d9a5917ea4cdfff
-refs/heads/try: d493438c9805ff82b45aa5c40941c05311794130
+refs/heads/try: a681628bd4faf9135f0764b3f1f1fdcafc491de6
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105

branches/try/src/comp/syntax/parse/lexer.rs

@@ -220,6 +220,9 @@ fn scan_number(c: char, rdr: reader) -> token::token {
             tp = if signed { either::left(ast::ty_i64) }
                       else { either::right(ast::ty_u64) };
         }
+        if str::byte_len(num_str) == 0u {
+            rdr.fatal("no valid digits found for number");
+        }
         let parsed = u64::from_str(num_str, base as u64);
         alt tp {
           either::left(t) { ret token::LIT_INT(parsed as i64, t); }
@@ -264,6 +267,9 @@ fn scan_number(c: char, rdr: reader) -> token::token {
         ret token::LIT_FLOAT(interner::intern(*rdr.interner, num_str),
                              ast::ty_f);
     } else {
+        if str::byte_len(num_str) == 0u {
+            rdr.fatal("no valid digits found for number");
+        }
         let parsed = u64::from_str(num_str, base as u64);
         ret token::LIT_INT(parsed as i64, ast::ty_i);
     }