5 files changed, 66 insertions, 0 deletions
diff --git a/test/files/neg/t8266-invalid-interp.check b/test/files/neg/t8266-invalid-interp.check
new file mode 100644
index 0000000000..70dd4081b0
--- /dev/null
+++ b/test/files/neg/t8266-invalid-interp.check
@@ -0,0 +1,10 @@
+t8266-invalid-interp.scala:4: error: Trailing '\' escapes nothing.
+    f"a\",
+       ^
+t8266-invalid-interp.scala:5: error: invalid escape character at index 1 in "a\xc"
+    f"a\xc",
+       ^
+t8266-invalid-interp.scala:7: error: invalid escape character at index 1 in "a\vc"
+    f"a\vc"
+       ^
+three errors found
diff --git a/test/files/neg/t8266-invalid-interp.scala b/test/files/neg/t8266-invalid-interp.scala
new file mode 100644
index 0000000000..4b26546880
--- /dev/null
+++ b/test/files/neg/t8266-invalid-interp.scala
@@ -0,0 +1,9 @@
+
+trait X {
+  def f = Seq(
+    f"a\",
+    f"a\xc",
+    // following could suggest \u000b for vertical tab, similar for \a alert
+    f"a\vc"
+  )
+}
diff --git a/test/files/run/t8266-octal-interp.check b/test/files/run/t8266-octal-interp.check
new file mode 100644
index 0000000000..6e9454119b
--- /dev/null
+++ b/test/files/run/t8266-octal-interp.check
@@ -0,0 +1,30 @@
+t8266-octal-interp.scala:4: warning: Octal escape literals are deprecated, use \b instead.
+    f"a\10c",
+       ^
+t8266-octal-interp.scala:5: warning: Octal escape literals are deprecated, use \t instead.
+    f"a\11c",
+       ^
+t8266-octal-interp.scala:6: warning: Octal escape literals are deprecated, use \n instead.
+    f"a\12c",
+       ^
+t8266-octal-interp.scala:7: warning: Octal escape literals are deprecated, use \r instead.
+    f"a\15c",
+       ^
+t8266-octal-interp.scala:8: warning: Octal escape literals are deprecated, use \u0022 instead.
+    f"a\42c",
+       ^
+t8266-octal-interp.scala:9: warning: Octal escape literals are deprecated, use \\ instead.
+    f"a\134c",
+       ^
+t8266-octal-interp.scala:10: warning: Octal escape literals are deprecated, use \u0069 instead.
+    f"a\15151515c"
+       ^
+ac
+a	c
+a
+c
+a
+c
+a"c
+a\c
+ai51515c
diff --git a/test/files/run/t8266-octal-interp.flags b/test/files/run/t8266-octal-interp.flags
new file mode 100644
index 0000000000..dcc59ebe32
--- /dev/null
+++ b/test/files/run/t8266-octal-interp.flags
@@ -0,0 +1 @@
+-deprecation
diff --git a/test/files/run/t8266-octal-interp.scala b/test/files/run/t8266-octal-interp.scala
new file mode 100644
index 0000000000..f85ae0367d
--- /dev/null
+++ b/test/files/run/t8266-octal-interp.scala
@@ -0,0 +1,16 @@
+
+trait X {
+  def f = Seq(
+    f"a\10c",
+    f"a\11c",
+    f"a\12c",
+    f"a\15c",
+    f"a\42c",
+    f"a\134c",
+    f"a\15151515c"
+  )
+}
+
+object Test extends App with X {
+  f foreach println
+}