diff options
Diffstat (limited to 'src/libsyntax_ext')
| -rw-r--r-- | src/libsyntax_ext/proc_macro_registrar.rs | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/src/libsyntax_ext/proc_macro_registrar.rs b/src/libsyntax_ext/proc_macro_registrar.rs index ab2bb446631..63341c8ce37 100644 --- a/src/libsyntax_ext/proc_macro_registrar.rs +++ b/src/libsyntax_ext/proc_macro_registrar.rs @@ -147,11 +147,6 @@ impl<'a> CollectProcMacros<'a> { "cannot override a built-in #[derive] mode"); } - if self.derives.iter().any(|d| d.trait_name == trait_name) { - self.handler.span_err(trait_attr.span(), - "derive mode defined twice in this crate"); - } - let proc_attrs: Vec<_> = if let Some(attr) = attributes_attr { if !attr.check_name("attributes") { self.handler.span_err(attr.span(), "second argument must be `attributes`") |