3 files changed, 47 insertions, 0 deletions
diff --git a/src/test/run-make/incr-prev-body-beyond-eof/Makefile b/src/test/run-make/incr-prev-body-beyond-eof/Makefile
new file mode 100644
index 000000000..24eea3aca
--- /dev/null
+++ b/src/test/run-make/incr-prev-body-beyond-eof/Makefile
@@ -0,0 +1,19 @@
+# ignore-none no-std is not supported
+# ignore-nvptx64-nvidia-cuda FIXME: can't find crate for `std`
+
+include ../../run-make-fulldeps/tools.mk
+
+# Tests that we don't ICE during incremental compilation after modifying a
+# function span such that its previous end line exceeds the number of lines
+# in the new file, but its start line/column and length remain the same.
+
+SRC=$(TMPDIR)/src
+INCR=$(TMPDIR)/incr
+
+all:
+	mkdir $(SRC)
+	mkdir $(INCR)
+	cp a.rs $(SRC)/main.rs
+	$(RUSTC) -C incremental=$(INCR) $(SRC)/main.rs --target $(TARGET)
+	cp b.rs $(SRC)/main.rs
+	$(RUSTC) -C incremental=$(INCR) $(SRC)/main.rs --target $(TARGET)
diff --git a/src/test/run-make/incr-prev-body-beyond-eof/a.rs b/src/test/run-make/incr-prev-body-beyond-eof/a.rs
new file mode 100644
index 000000000..ca70fb563
--- /dev/null
+++ b/src/test/run-make/incr-prev-body-beyond-eof/a.rs
@@ -0,0 +1,16 @@
+fn main() {
+    // foo must be used.
+    foo();
+}
+
+// For this test to operate correctly, foo's body must start on exactly the same
+// line and column and have the exact same length in bytes in a.rs and b.rs. In
+// a.rs, the body must end on a line number which does not exist in b.rs.
+// Basically, avoid modifying this file, including adding or removing whitespace!
+fn foo() {
+    assert_eq!(1, 1);
+
+
+
+
+}
diff --git a/src/test/run-make/incr-prev-body-beyond-eof/b.rs b/src/test/run-make/incr-prev-body-beyond-eof/b.rs
new file mode 100644
index 000000000..a272e44a6
--- /dev/null
+++ b/src/test/run-make/incr-prev-body-beyond-eof/b.rs
@@ -0,0 +1,12 @@
+fn main() {
+    // foo must be used.
+    foo();
+}
+
+// For this test to operate correctly, foo's body must start on exactly the same
+// line and column and have the exact same length in bytes in a.rs and b.rs. In
+// a.rs, the body must end on a line number which does not exist in b.rs.
+// Basically, avoid modifying this file, including adding or removing whitespace!
+fn foo() {
+    assert_eq!(1, 1);////
+}