Address some comments

3 files changed, 17 insertions, 0 deletions

diff --git a/src/test/rustdoc-ui/track-diagnostics.rs b/src/test/rustdoc-ui/track-diagnostics.rs
new file mode 100644
index 00000000000..fc5343a982e
--- /dev/null
+++ b/src/test/rustdoc-ui/track-diagnostics.rs
@@ -0,0 +1,6 @@
+// compile-flags: -Z track-diagnostics
+// error-pattern: created at
+
+struct A;
+struct B;
+const S: A = B;
diff --git a/src/test/rustdoc-ui/track-diagnostics.stderr b/src/test/rustdoc-ui/track-diagnostics.stderr
new file mode 100644
index 00000000000..76453cfe220
--- /dev/null
+++ b/src/test/rustdoc-ui/track-diagnostics.stderr
@@ -0,0 +1,10 @@
+error[E0308]: mismatched types
+  --> $DIR/track-diagnostics.rs:6:14
+   |
+LL | const S: A = B;
+   |              ^ expected struct `A`, found struct `B`
+-Ztrack-diagnostics: created at compiler/rustc_infer/src/infer/error_reporting/mod.rs:2275:31
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/rustdoc-ui/z-help.stdout b/src/test/rustdoc-ui/z-help.stdout
index dbf3a8f00ee..07c8793c08b 100644
--- a/src/test/rustdoc-ui/z-help.stdout
+++ b/src/test/rustdoc-ui/z-help.stdout
@@ -170,6 +170,7 @@
     -Z                             time-passes=val -- measure time of each rustc pass (default: no)
     -Z                               tls-model=val -- choose the TLS model to use (`rustc --print tls-models` for details)
     -Z                            trace-macros=val -- for every macro invocation, print its name and arguments (default: no)
+    -Z                       track-diagnostics=val -- Tracks where in rustc a diagnostic was emitted
     -Z                translate-additional-ftl=val -- additional fluent translation to preferentially use (for testing translation)
     -Z        translate-directionality-markers=val -- emit directionality isolation markers in translated diagnostics
     -Z                          translate-lang=val -- language identifier for diagnostic output