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Don't skip argument parsing when running rustc with no arguments #135716

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Jan 19, 2025
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Don't skip argument parsing when running rustc with no arguments #135716

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11 changes: 1 addition & 10 deletions compiler/rustc_driver_impl/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1191,15 +1191,6 @@ fn print_flag_list<T>(cmdline_opt: &str, flag_list: &[OptionDesc<T>]) {
/// be public when using rustc as a library, see
/// <https://github.com/rust-lang/rust/commit/2b4c33817a5aaecabf4c6598d41e190080ec119e>
pub fn handle_options(early_dcx: &EarlyDiagCtxt, args: &[String]) -> Option<getopts::Matches> {
if args.is_empty() {
// user did not write `-v` nor `-Z unstable-options`, so do not
// include that extra information.
let nightly_build =
rustc_feature::UnstableFeatures::from_environment(None).is_nightly_build();
usage(false, false, nightly_build);
return None;
}

// Parse with *all* options defined in the compiler, we don't worry about
// option stability here we just want to parse as much as possible.
let mut options = getopts::Options::new();
Expand Down Expand Up @@ -1245,7 +1236,7 @@ pub fn handle_options(early_dcx: &EarlyDiagCtxt, args: &[String]) -> Option<geto
// (unstable option being used on stable)
nightly_options::check_nightly_options(early_dcx, &matches, &config::rustc_optgroups());

if matches.opt_present("h") || matches.opt_present("help") {
if args.is_empty() || matches.opt_present("h") || matches.opt_present("help") {
// Only show unstable options in --help if we accept unstable options.
let unstable_enabled = nightly_options::is_unstable_enabled(&matches);
let nightly_build = nightly_options::match_is_nightly_build(&matches);
Expand Down
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