From aa7d19f06db9273060180856d6dd6f38a91c6903 Mon Sep 17 00:00:00 2001
From: Som Snytt <som.snytt@gmail.com>
Date: Sat, 6 May 2023 16:53:06 -0700
Subject: [PATCH] Method calls get a line number

---
 .../tools/backend/jvm/BCodeBodyBuilder.scala  |  1 +
 tests/run/apply-line.scala                    | 26 +++++++++++++++++++
 2 files changed, 27 insertions(+)
 create mode 100644 tests/run/apply-line.scala

diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala b/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala
index e7b5a0dad1bf..d1a67969d6de 100644
--- a/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala
@@ -866,6 +866,7 @@ trait BCodeBodyBuilder extends BCodeSkelBuilder {
                   defn.ObjectClass
                 } else qualSym
               }
+              lineNumber(app)
               generatedType = genCallMethod(sym, invokeStyle, app.span, receiverClass)
             }
           }
diff --git a/tests/run/apply-line.scala b/tests/run/apply-line.scala
new file mode 100644
index 000000000000..3da681fa9206
--- /dev/null
+++ b/tests/run/apply-line.scala
@@ -0,0 +1,26 @@
+
+object Test:
+
+  def void(): Unit = ???
+  def self(): this.type = this
+
+  def test(): Unit =
+    this // is line 8
+      .self()
+      .void()
+
+  @annotation.nowarn
+  def main(args: Array[String]): Unit =
+    try test()
+    catch (t: Throwable) =>
+      t.getStackTrace.iterator
+        .filter(_.getFileName == "apply-line.scala")
+        .filter(_.getMethodName == "test")
+        .foreach(sf => assert(sf.getLineNumber == 10))
+
+/* was
+Test$.void(apply-line.scala:4)
+Test$.test(apply-line.scala:8)
+Test$.main(apply-line.scala:14)
+Test.main(apply-line.scala)
+*/