Fix #5629: Add regression test

Author: nicolasstucki

tests/run/i5629/Macro_1.scala

@@ -0,0 +1,20 @@
+import scala.quoted._
+import scala.tasty._
+
+object Macros {
+
+  inline def assert(condition: => Boolean): Unit = ${ assertImpl('{condition}, '{""}) }
+
+  def assertImpl(cond: Expr[Boolean], clue: Expr[Any])(implicit refl: Reflection): Expr[Unit] = {
+    import refl._
+    val b = cond.unseal.underlyingArgument.seal[Boolean]
+    '{ scala.Predef.assert($b) }
+  }
+
+  inline def thisLineNumber = ${ thisLineNumberImpl }
+
+  def thisLineNumberImpl(implicit refl: Reflection): Expr[Int] = {
+    import refl._
+    refl.rootPosition.startLine.toExpr
+  }
+}

tests/run/i5629/Test_2.scala

@@ -0,0 +1,10 @@
+object Test {
+  import Macros._
+
+  def main(args: Array[String]): Unit = {
+    val startLine = thisLineNumber
+    assert(thisLineNumber == startLine + 1)
+    assert(thisLineNumber == startLine + 2)
+    scala.Predef.assert(thisLineNumber == startLine + 3)
+  }
+}