From e761bf0601a56db26c31891a3433c1319814fffa Mon Sep 17 00:00:00 2001
From: Ben Burdette <bburdette@protonmail.com>
Date: Mon, 14 Feb 2022 14:04:34 -0700
Subject: [PATCH] make an 'info' level error on break

---
 src/libcmd/repl.cc     | 16 +---------------
 src/libexpr/primops.cc | 15 +++++++--------
 2 files changed, 8 insertions(+), 23 deletions(-)

diff --git a/src/libcmd/repl.cc b/src/libcmd/repl.cc
index 51bbbbc57..db88aa9b6 100644
--- a/src/libcmd/repl.cc
+++ b/src/libcmd/repl.cc
@@ -931,24 +931,10 @@ void runRepl(
 {
     auto repl = std::make_unique<NixRepl>(evalState);
 
-    // repl->debugError = debugError;
+    repl->debugError = debugError;
 
     repl->initEnv();
 
-    // auto dts = debugError ? 
-    //     std::unique_ptr<DebugTraceStacker>(
-    //         // tack on a final DebugTrace for the error position.
-    //         new DebugTraceStacker(
-    //               *evalState,
-    //               DebugTrace
-    //                     {.pos = debugError->info().errPos,
-    //                      .expr = expr,
-    //                      .env = *repl->env,
-    //                      .hint = debugError->info().msg
-    //                     })
-    //         )
-    //     : nullptr;
-
     // add 'extra' vars.
     std::set<std::string> names;
     for (auto & [name, value] : extraEnv) {
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 956c55e49..25845bdc4 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -699,6 +699,7 @@ static RegisterPrimOp primop_genericClosure(RegisterPrimOp::Info {
     .fun = prim_genericClosure,
 });
 
+
 static RegisterPrimOp primop_break({
     .name = "break",
     .args = {"v"},
@@ -707,17 +708,15 @@ static RegisterPrimOp primop_break({
     )",
     .fun = [](EvalState & state, const Pos & pos, Value * * args, Value & v)
     {
-        std::cout << "primop_break, value: " << *args[0] << std::endl;
-        // PathSet context;
-        // string s = state.coerceToString(pos, *args[0], context);
+        auto error = Error(ErrorInfo{
+            .level = lvlInfo,
+            .msg = hintfmt("breakpoint reached; value was %1%", *args[0]),
+            .errPos = pos,
+        });
         if (debuggerHook && !state.debugTraces.empty())
         {
           auto &dt = state.debugTraces.front();
-          // std::optional<ErrPos> pos;
-          // const Expr &expr;
-          // const Env &env;
-          // hintformat hint;
-          debuggerHook(nullptr, dt.env, dt.expr);
+          debuggerHook(&error, dt.env, dt.expr);
 
           // returning the value we were passed.
           v = *args[0];