diff options
Diffstat (limited to 'compiler/rustc_interface')
| -rw-r--r-- | compiler/rustc_interface/src/interface.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rustc_interface/src/interface.rs b/compiler/rustc_interface/src/interface.rs index 32fba6ade88..5ca88090996 100644 --- a/compiler/rustc_interface/src/interface.rs +++ b/compiler/rustc_interface/src/interface.rs @@ -218,7 +218,9 @@ pub(crate) fn parse_check_cfg(dcx: &DiagCtxt, specs: Vec<String>) -> CheckCfg { } } - if values.is_empty() && !values_any_specified && !any_specified { + if !values_specified && !any_specified { + // `cfg(name)` is equivalent to `cfg(name, values(none()))` so add + // an implicit `none()` values.insert(None); } else if !values.is_empty() && values_any_specified { error!( |