Rollup merge of #58984 - estebank:multi-treat-err-as-bug, r=oli-obk

Teach `-Z treat-err-as-bug` to take a number of errors to emit

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

Fix #58983.

2 files changed, 2 insertions, 2 deletions

diff --git a/src/libsyntax/parse/lexer/mod.rs b/src/libsyntax/parse/lexer/mod.rs
index a7cde5fbb92..db5b8dcda4e 100644
--- a/src/libsyntax/parse/lexer/mod.rs
+++ b/src/libsyntax/parse/lexer/mod.rs
@@ -1920,7 +1920,7 @@ mod tests {
                                                           false,
                                                           false);
         ParseSess {
-            span_diagnostic: errors::Handler::with_emitter(true, false, Box::new(emitter)),
+            span_diagnostic: errors::Handler::with_emitter(true, None, Box::new(emitter)),
             unstable_features: UnstableFeatures::from_environment(),
             config: CrateConfig::default(),
             included_mod_stack: Lock::new(Vec::new()),
diff --git a/src/libsyntax/parse/mod.rs b/src/libsyntax/parse/mod.rs
index b2d4d97d57d..9cfcfcd6241 100644
--- a/src/libsyntax/parse/mod.rs
+++ b/src/libsyntax/parse/mod.rs
@@ -53,7 +53,7 @@ impl ParseSess {
         let cm = Lrc::new(SourceMap::new(file_path_mapping));
         let handler = Handler::with_tty_emitter(ColorConfig::Auto,
                                                 true,
-                                                false,
+                                                None,
                                                 Some(cm.clone()));
         ParseSess::with_span_handler(handler, cm)
     }