Fix use after free in content-address.cc

Inspired by https://github.com/NixOS/nix/pull/5599

1 files changed, 4 insertions, 2 deletions

diff --git a/src/libstore/content-address.cc b/src/libstore/content-address.cc
index 974d1c471..cf32ccdc4 100644
--- a/src/libstore/content-address.cc
+++ b/src/libstore/content-address.cc
@@ -120,8 +120,10 @@ ContentAddress parseContentAddress(std::string_view rawCa) {
 
 ContentAddressMethod parseContentAddressMethod(std::string_view caMethod)
 {
-    std::string_view asPrefix {std::string{caMethod} + ":"};
-    return parseContentAddressMethodPrefix(asPrefix);
+    std::string asPrefix = std::string{caMethod} + ":";
+    // parseContentAddressMethodPrefix takes its argument by reference
+    std::string_view asPrefixView = asPrefix;
+    return parseContentAddressMethodPrefix(asPrefixView);
 }
 
 std::optional<ContentAddress> parseContentAddressOpt(std::string_view rawCaOpt)