Fix crash in test runner with gc mode

2 files changed, 4 insertions, 1 deletions

diff --git a/src/bun.zig b/src/bun.zig
index 6443c6923..a615cd62a 100644
--- a/src/bun.zig
+++ b/src/bun.zig
@@ -498,3 +498,4 @@ pub const analytics = @import("./analytics.zig");
 pub const DateTime = @import("./deps/zig-datetime/src/datetime.zig");
 
 pub var start_time: i128 = 0;
+pub const MimallocArena = @import("./mimalloc_arena.zig").Arena;
diff --git a/src/cli/test_command.zig b/src/cli/test_command.zig
index a8e028d75..48e27011a 100644
--- a/src/cli/test_command.zig
+++ b/src/cli/test_command.zig
@@ -451,8 +451,10 @@ pub const TestCommand = struct {
             }
         };
 
+        var arena = bun.MimallocArena.init() catch @panic("Unexpected error in mimalloc");
         vm_.eventLoop().ensureWaker();
-
+        vm_.arena = &arena;
+        vm_.allocator = arena.allocator();
         var ctx = Context{ .reporter = reporter_, .vm = vm_, .files = files_, .allocator = allocator_ };
         vm_.runWithAPILock(Context, &ctx, Context.begin);
     }