From 59db8fd62b5300afbbabb1e8a12d547b336a3bdf Mon Sep 17 00:00:00 2001 From: Tom Bereknyei Date: Sun, 18 Aug 2024 22:35:54 -0400 Subject: [PATCH] fix: check to see if there are any lines before --- src/nix-build/nix-build.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/nix-build/nix-build.cc b/src/nix-build/nix-build.cc index 0ce987d8a..a5b9e1e54 100644 --- a/src/nix-build/nix-build.cc +++ b/src/nix-build/nix-build.cc @@ -163,7 +163,7 @@ static void main_nix_build(int argc, char * * argv) script = argv[1]; try { auto lines = tokenizeString(readFile(script), "\n"); - if (std::regex_search(lines.front(), std::regex("^#!"))) { + if (!lines.empty() && std::regex_search(lines.front(), std::regex("^#!"))) { lines.pop_front(); inShebang = true; for (int i = 2; i < argc; ++i)