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fix: check to see if there are any lines before

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(cherry picked from commit 59db8fd62b)
This commit is contained in:
Tom Bereknyei 2024-08-18 22:35:54 -04:00 committed by github-actions[bot]
parent d02b2eb187
commit 7cca0f3794
1 changed files with 1 additions and 1 deletions
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src/nix-build/nix-build.cc
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@ -136,7 +136,7 @@ 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)