From 33a6a3027f0b1ec931824a4b2206bf6659df53a4 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Wed, 30 Nov 2022 13:57:12 -0500
Subject: parse: Pass the right argument when warning about -O9

---
 src/parse.c           |  2 +-
 tests/bfs/warn_O9.out | 19 +++++++++++++++++++
 tests/bfs/warn_O9.sh  |  3 +++
 3 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 tests/bfs/warn_O9.out
 create mode 100644 tests/bfs/warn_O9.sh

diff --git a/src/parse.c b/src/parse.c
index 16132f3..5ef71f8 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -1016,7 +1016,7 @@ static struct bfs_expr *parse_optlevel(struct parser_state *state, int arg1, int
 	}
 
 	if (*optlevel > 4) {
-		parse_expr_warning(state, expr, "${cyn}-O${bld}%s${rs} is the same as ${cyn}-O${bld}4${rs}.\n\n", state->argv[0] + 2);
+		parse_expr_warning(state, expr, "${cyn}-O${bld}%s${rs} is the same as ${cyn}-O${bld}4${rs}.\n\n", expr->argv[0] + 2);
 	}
 
 	return expr;
diff --git a/tests/bfs/warn_O9.out b/tests/bfs/warn_O9.out
new file mode 100644
index 0000000..336a6e8
--- /dev/null
+++ b/tests/bfs/warn_O9.out
@@ -0,0 +1,19 @@
+.
+./a
+./b
+./c
+./c/d
+./e
+./e/f
+./g
+./g/h
+./i
+./j
+./j/foo
+./k
+./k/foo
+./k/foo/bar
+./l
+./l/foo
+./l/foo/bar
+./l/foo/bar/baz
diff --git a/tests/bfs/warn_O9.sh b/tests/bfs/warn_O9.sh
new file mode 100644
index 0000000..821789f
--- /dev/null
+++ b/tests/bfs/warn_O9.sh
@@ -0,0 +1,3 @@
+# Regression test: don't crash when warning if -O9 is the last argument
+cd basic
+bfs_diff -warn -O9
-- 
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