refactor(3p/nix/libexpr): Use absl::btree_map for AttrSets r/799

This is the first step towards replacing the implementation of
attribute sets with an absl::btree_map.

Currently many access are done using array offsets and pointer
arithmetic, so this change is currently causing Nix to fail in various
ways.

1 files changed, 1 insertions, 1 deletions

diff --git a/third_party/nix/src/libexpr/nixexpr.cc b/third_party/nix/src/libexpr/nixexpr.cc
index 49b4a7ea41..3d454d266f 100644
--- a/third_party/nix/src/libexpr/nixexpr.cc
+++ b/third_party/nix/src/libexpr/nixexpr.cc
@@ -285,7 +285,7 @@ void ExprOpHasAttr::bindVars(const StaticEnv& env) {
 
 void ExprAttrs::bindVars(const StaticEnv& env) {
   const StaticEnv* dynamicEnv = &env;
-  StaticEnv newEnv(false, &env);
+  StaticEnv newEnv(/* isWith = */ false, &env);
 
   if (recursive) {
     dynamicEnv = &newEnv;