Merge pull request #11339 from NixOS/backport-11332-to-2.21-maintenance

[Backport 2.21-maintenance] [Backport 2.22-maintenance] fix: check to see if there are any lines before
NixOS · Aug 20, 2024 · 2046691 · 2046691
2 parents a4c9218 + 1842768
commit 2046691
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/nix-build/nix-build.cc b/src/nix-build/nix-build.cc
@@ -134,7 +134,7 @@ static void main_nix_build(int argc, char * * argv)
         script = argv[1];
         try {
             auto lines = tokenizeString<Strings>(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)