From a576b295a7be0598f1173ba5ab2f586bc9a23aed Mon Sep 17 00:00:00 2001
From: Jacob Young <jacobly0@users.noreply.github.com>
Date: Sat, 7 Oct 2023 17:29:11 -0400
Subject: [PATCH] cbe: fix crash on error

This hashmap value used to be assigned much later during `flushModule`,
which never happens if an error is returned by the backend, and
attempting to the undefined values would cause a crash.
---
 src/codegen/c.zig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/codegen/c.zig b/src/codegen/c.zig
index 3278ed89b095..94598985c060 100644
--- a/src/codegen/c.zig
+++ b/src/codegen/c.zig
@@ -592,7 +592,8 @@ pub const DeclGen = struct {
 
         // Indicate that the anon decl should be rendered to the output so that
         // our reference above is not undefined.
-        _ = try dg.anon_decl_deps.getOrPut(dg.gpa, decl_val);
+        const gop = try dg.anon_decl_deps.getOrPut(dg.gpa, decl_val);
+        if (!gop.found_existing) gop.value_ptr.* = .{};
     }
 
     fn renderDeclValue(