Commit 2a3393eff8

@@ -39,7 +39,12 @@ pub export fn main(argc: c_int, argv: [*]const [*:0]const u8) c_int {
     for (args) |*arg, i| {
         arg.* = mem.spanZ(argv[i]);
     }
-    stage2.mainArgs(gpa, arena, args) catch |err| fatal("{}", .{@errorName(err)});
+    stage2.mainArgs(gpa, arena, args) catch |err| {
+        if (@errorReturnTrace()) |trace| {
+            std.debug.dumpStackTrace(trace.*);
+        }
+        fatal("unhandled internal error: {}", .{@errorName(err)});
+    };
     return 0;
 }