Report line number of test when should_panic test failed

library/test/src/test_result.rs

@@ -77,7 +77,12 @@ pub(crate) fn calc_result(
 
         // The test should have panicked, but didn't panic.
         (ShouldPanic::Yes, None) | (ShouldPanic::YesWithMessage(_), None) => {
-            TestResult::TrFailedMsg("test did not panic as expected".to_string())
+            let fn_location = if !desc.source_file.is_empty() {
+                &format!(" at {}:{}:{}", desc.source_file, desc.start_line, desc.start_col)
+            } else {
+                ""
+            };
+            TestResult::TrFailedMsg(format!("test did not panic as expected{}", fn_location))
         }
 
         // The test should not have panicked, but did panic.

tests/rustdoc-ui/doctest/failed-doctest-should-panic.stdout

@@ -5,7 +5,7 @@ test $DIR/failed-doctest-should-panic.rs - Foo (line 10) - should panic ... FAIL
 failures:
 
 ---- $DIR/failed-doctest-should-panic.rs - Foo (line 10) stdout ----
-note: test did not panic as expected
+note: test did not panic as expected at $DIR/failed-doctest-should-panic.rs:10:0
 
 failures:
     $DIR/failed-doctest-should-panic.rs - Foo (line 10)

tests/ui/test-attrs/test-should-panic-failed-show-span.rs

@@ -0,0 +1,46 @@
+//@ compile-flags: --test
+//@ run-flags: --test-threads=1 --nocapture
+//@ run-fail
+//@ check-run-results
+//@ exec-env:RUST_BACKTRACE=0
+//@ normalize-stdout: "finished in \d+\.\d+s" -> "finished in $$TIME"
+//@ normalize-stdout: "TypeId\(0x[0-9a-f]+\)" -> "TypeId($$HEX)"
+//@ needs-threads
+//@ needs-unwind (panic)
+
+#[test]
+#[should_panic]
+fn should_panic_with_any_message() {
+    panic!("Panic!");
+}
+
+#[test]
+#[should_panic = "message"]
+fn should_panic_with_message() {
+    panic!("message");
+}
+
+#[test]
+#[should_panic]
+fn should_panic_with_any_message_does_not_panic() {
+    // DON'T PANIC
+}
+
+#[test]
+#[should_panic = "message"]
+fn should_panic_with_message_does_not_panic() {
+    // DON'T PANIC
+}
+
+#[test]
+#[should_panic = "message"]
+fn should_panic_with_substring_panics_with_incorrect_string() {
+    panic!("ZOMGWTFBBQ");
+}
+
+#[test]
+#[should_panic = "message"]
+#[expect(non_fmt_panics)]
+fn should_panic_with_substring_panics_with_non_string_value() {
+    panic!(123);
+}

tests/ui/test-attrs/test-should-panic-failed-show-span.run.stderr

@@ -0,0 +1,13 @@
+
+thread 'should_panic_with_any_message' panicked at $DIR/test-should-panic-failed-show-span.rs:14:5:
+Panic!
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+thread 'should_panic_with_message' panicked at $DIR/test-should-panic-failed-show-span.rs:20:5:
+message
+
+thread 'should_panic_with_substring_panics_with_incorrect_string' panicked at $DIR/test-should-panic-failed-show-span.rs:38:5:
+ZOMGWTFBBQ
+
+thread 'should_panic_with_substring_panics_with_non_string_value' panicked at $DIR/test-should-panic-failed-show-span.rs:45:5:
+Box<dyn Any>

tests/ui/test-attrs/test-should-panic-failed-show-span.run.stdout

@@ -0,0 +1,32 @@
+
+running 6 tests
+test should_panic_with_any_message - should panic ... ok
+test should_panic_with_any_message_does_not_panic - should panic ... FAILED
+test should_panic_with_message - should panic ... ok
+test should_panic_with_message_does_not_panic - should panic ... FAILED
+test should_panic_with_substring_panics_with_incorrect_string - should panic ... FAILED
+test should_panic_with_substring_panics_with_non_string_value - should panic ... FAILED
+
+failures:
+
+---- should_panic_with_any_message_does_not_panic stdout ----
+note: test did not panic as expected at $DIR/test-should-panic-failed-show-span.rs:25:4
+---- should_panic_with_message_does_not_panic stdout ----
+note: test did not panic as expected at $DIR/test-should-panic-failed-show-span.rs:31:4
+---- should_panic_with_substring_panics_with_incorrect_string stdout ----
+note: panic did not contain expected string
+      panic message: `"ZOMGWTFBBQ"`,
+ expected substring: `"message"`
+---- should_panic_with_substring_panics_with_non_string_value stdout ----
+note: expected panic with string value,
+ found non-string value: `TypeId($HEX)`
+     expected substring: `"message"`
+
+failures:
+    should_panic_with_any_message_does_not_panic
+    should_panic_with_message_does_not_panic
+    should_panic_with_substring_panics_with_incorrect_string
+    should_panic_with_substring_panics_with_non_string_value
+
+test result: FAILED. 2 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in $TIME
+