From 87d9148b822bbae6286289199d535c79f2df64cf Mon Sep 17 00:00:00 2001
From: Syed Daanish <me@syedm.dev>
Date: Sun, 30 Aug 2026 13:08:48 +0100
Subject: [PATCH] Fix segv on uninitialized command fields.

---
 include/internal/parser/parser.h | 6 +++---
 src/bed/run.cc                   | 3 ++-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/internal/parser/parser.h b/include/internal/parser/parser.h
index 033187f..aee2cb3 100644
--- a/include/internal/parser/parser.h
+++ b/include/internal/parser/parser.h
@@ -65,10 +65,10 @@ struct AddressPromise {
 struct Command {
   bool temp_address{false};
   std::vector<AddressPromise> addresses{};
-  functions::Function *function;
-  functions::Function::Argument argument;
+  functions::Function *function{nullptr};
+  functions::Function::Argument argument{std::monostate()};
   std::vector<AddressPromise> argument_addresses{};
-  functions::Suffix *suffix;
+  functions::Suffix *suffix{nullptr};
 };
 
 struct CompletionContext {
diff --git a/src/bed/run.cc b/src/bed/run.cc
index 6104575..c6cdcf2 100644
--- a/src/bed/run.cc
+++ b/src/bed/run.cc
@@ -124,7 +124,8 @@ void BEd::handle(std::string_view cmd, bool eof) {
         throw ed_error("Line number can't be zero.");
     }
   }
-  c.function->handle(*this, address, nullptr, c.argument, nullptr);
+  if (c.function->handle)
+    c.function->handle(*this, address, nullptr, c.argument, nullptr);
   if (c.suffix)
     c.suffix->handle(*this);
   if (c.temp_address)