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explanatory error on --print target-spec-json without unstable options

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Resolves #41683.
This commit is contained in:
Zack M. Davis 2017-07-15 12:32:31 -07:00
parent 9bbbd29e82
commit c6a23996ca
1 changed files with 9 additions and 2 deletions
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11
src/librustc/session/config.rs
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@ -1615,8 +1615,15 @@ pub fn build_session_options_and_crate_config(matches: &getopts::Matches)
"target-features" => PrintRequest::TargetFeatures,
"relocation-models" => PrintRequest::RelocationModels,
"code-models" => PrintRequest::CodeModels,
"target-spec-json" if nightly_options::is_unstable_enabled(matches)
=> PrintRequest::TargetSpec,
"target-spec-json" => {
if nightly_options::is_unstable_enabled(matches) {
PrintRequest::TargetSpec
} else {
early_error(error_format,
&format!("the `-Z unstable-options` flag must also be passed to \
enable the target-spec-json print option"));
}
},
req => {
early_error(error_format, &format!("unknown print request `{}`", req))
}