Make `-Z treat-err-as-bug` take a number of errors to be emitted

`-Z treat-err-as-bug=0` will cause `rustc` to panic after the first
error is reported. `-Z treat-err-as-bug=2` will cause `rustc` to
panic after 3 errors have been reported.

2 files changed, 4 insertions, 4 deletions

diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs
index 774ab0333db..dfd8e4dd571 100644
--- a/src/librustc/session/config.rs
+++ b/src/librustc/session/config.rs
@@ -1234,7 +1234,7 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
         "parse only; do not compile, assemble, or link"),
     no_codegen: bool = (false, parse_bool, [TRACKED],
         "run all passes except codegen; no output"),
-    treat_err_as_bug: bool = (false, parse_bool, [TRACKED],
+    treat_err_as_bug: Option<usize> = (None, parse_opt_uint, [TRACKED],
         "treat all errors that occur as bugs"),
     report_delayed_bugs: bool = (false, parse_bool, [TRACKED],
         "immediately print bugs registered with `delay_span_bug`"),
@@ -3212,7 +3212,7 @@ mod tests {
         assert!(reference.dep_tracking_hash() != opts.dep_tracking_hash());
 
         opts = reference.clone();
-        opts.debugging_opts.treat_err_as_bug = true;
+        opts.debugging_opts.treat_err_as_bug = Some(1);
         assert!(reference.dep_tracking_hash() != opts.dep_tracking_hash());
 
         opts = reference.clone();
diff --git a/src/librustc/session/mod.rs b/src/librustc/session/mod.rs
index 774bc8b450b..751fa7e95e3 100644
--- a/src/librustc/session/mod.rs
+++ b/src/librustc/session/mod.rs
@@ -1315,7 +1315,7 @@ pub fn early_error(output: config::ErrorOutputType, msg: &str) -> ! {
             Box::new(EmitterWriter::stderr(color_config, None, true, false))
         }
     };
-    let handler = errors::Handler::with_emitter(true, false, emitter);
+    let handler = errors::Handler::with_emitter(true, None, emitter);
     handler.emit(&MultiSpan::new(), msg, errors::Level::Fatal);
     errors::FatalError.raise();
 }
@@ -1330,7 +1330,7 @@ pub fn early_warn(output: config::ErrorOutputType, msg: &str) {
             Box::new(EmitterWriter::stderr(color_config, None, true, false))
         }
     };
-    let handler = errors::Handler::with_emitter(true, false, emitter);
+    let handler = errors::Handler::with_emitter(true, None, emitter);
     handler.emit(&MultiSpan::new(), msg, errors::Level::Warning);
 }