diff options
Diffstat (limited to 'src/libsyntax_ext')
| -rw-r--r-- | src/libsyntax_ext/format.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libsyntax_ext/format.rs b/src/libsyntax_ext/format.rs index 94bb78edaac..1f6f57c70f7 100644 --- a/src/libsyntax_ext/format.rs +++ b/src/libsyntax_ext/format.rs @@ -406,7 +406,9 @@ impl<'a, 'b> Context<'a, 'b> { let arg_idx = match arg_index_consumed.get_mut(i) { None => 0, // error already emitted elsewhere Some(offset) => { - let arg_idx = self.arg_index_map[i][*offset]; + let ref idx_map = self.arg_index_map[i]; + // unwrap_or branch: error already emitted elsewhere + let arg_idx = *idx_map.get(*offset).unwrap_or(&0); *offset += 1; arg_idx } |