1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/parser/bug1803036.js b/js/src/jit-test/tests/parser/bug1803036.js
new file mode 100644
index 0000000000..f1ab09a1c6
--- /dev/null
+++ b/js/src/jit-test/tests/parser/bug1803036.js
@@ -0,0 +1,22 @@
+// Test that parsing the given source text will throw an error with location set
+// to last character in source, rather than after it.
+function testErrorPosition(src) {
+    let failed = false;
+
+    try {
+        parse(src)
+    }
+    catch (e) {
+        failed = true;
+        assertEq(e.lineNumber, 1)
+        assertEq(e.columnNumber, src.length - 1)
+    }
+
+    assertEq(failed, true);
+}
+
+testErrorPosition("0_")  // No trailing separator - Zero
+testErrorPosition("00_") // No trailing separator - Octal
+testErrorPosition("1_")  // No trailing separator - Number
+testErrorPosition("1__") // No repeated separator
+testErrorPosition("00n") // No octal BigInt