diff options
| -rw-r--r-- | src/librustc/session/config.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs index ab753733450..b8dd750d3f1 100644 --- a/src/librustc/session/config.rs +++ b/src/librustc/session/config.rs @@ -1136,6 +1136,10 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options { (Some("3"), _) => OptLevel::Aggressive, (Some("s"), true) => OptLevel::Size, (Some("z"), true) => OptLevel::SizeMin, + (Some("s"), false) | (Some("z"), false) => { + early_error(error_format, &format!("the optimizations s or z are only \ + accepted on the nightly compiler")); + }, (Some(arg), _) => { early_error(error_format, &format!("optimization level needs to be \ between 0-3 (instead was `{}`)", |