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lines changed Original file line number Diff line number Diff line change @@ -32,6 +32,9 @@ fn main() {
3232 let args = env:: args_os ( ) . skip ( 1 ) . collect :: < Vec < _ > > ( ) ;
3333 let arg = |name| args. windows ( 2 ) . find ( |args| args[ 0 ] == name) . and_then ( |args| args[ 1 ] . to_str ( ) ) ;
3434
35+ // We don't use the stage in this shim, but let's parse it to make sure that we're invoked
36+ // by bootstrap, or that we provide a helpful error message if not.
37+ bin_helpers:: parse_rustc_stage ( ) ;
3538 let verbose = bin_helpers:: parse_rustc_verbose ( ) ;
3639
3740 // Detect whether or not we're a build script depending on whether --target
Original file line number Diff line number Diff line change @@ -18,7 +18,6 @@ pub(crate) fn parse_rustc_verbose() -> usize {
1818/// Parses the value of the "RUSTC_STAGE" environment variable and returns it as a `String`.
1919///
2020/// If "RUSTC_STAGE" was not set, the program will be terminated with 101.
21- #[ allow( unused) ]
2221pub ( crate ) fn parse_rustc_stage ( ) -> String {
2322 std:: env:: var ( "RUSTC_STAGE" ) . unwrap_or_else ( |_| {
2423 // Don't panic here; it's reasonable to try and run these shims directly. Give a helpful error instead.
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