From ba6a7526c938590539ab2c2137521565a1f9621b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carlo=20Marcelo=20Arenas=20Bel=C3=B3n?= <carenas@gmail.com>
Date: Sat, 21 Oct 2023 18:22:30 -0700
Subject: [PATCH] test: avoid UB in test17

Since 4ef0c51 (Interpret NULL pointer, zero length as an empty
string for subjects and replacements., 2021-11-30), a NULL pointer
with zero length has been internally replaced with an empty string
in all matching functions, but the test for jit was incorrectly
using the fastpath which intentionally skips all validation and
results in NULL pointer arithmetic operations.

Change the test to use the validating jit path instead.
---
 testdata/testinput17  | 2 +-
 testdata/testoutput17 | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/testdata/testinput17 b/testdata/testinput17
index caf4c91ae..9c62c3916 100644
--- a/testdata/testinput17
+++ b/testdata/testinput17
@@ -304,7 +304,7 @@
 /[aCz]/mg,firstline,newline=lf
     match\nmatch
 
-//jitfast
+//jit
     \=null_subject
 
 # End of testinput17
diff --git a/testdata/testoutput17 b/testdata/testoutput17
index b5b2cc8a1..5d68b0a47 100644
--- a/testdata/testoutput17
+++ b/testdata/testoutput17
@@ -550,7 +550,7 @@ Failed: error -47: match limit exceeded
     match\nmatch
  0: a (JIT)
 
-//jitfast
+//jit
     \=null_subject
  0:  (JIT)