fix(module-loader): use a more descriptive crash message (oven-sh#15831)

Co-authored-by: Don Isaac <don@bun.sh>
Co-authored-by: DonIsaac <DonIsaac@users.noreply.github.com>

src/bun.js/module_loader.zig

@@ -87,6 +87,7 @@ const Async = bun.Async;
 const String = bun.String;
 
 const debug = Output.scoped(.ModuleLoader, true);
+const panic = std.debug.panic;
 
 inline fn jsSyntheticModule(comptime name: ResolvedSource.Tag, specifier: String) ResolvedSource {
     return ResolvedSource{
@@ -1767,7 +1768,7 @@ pub const ModuleLoader = struct {
                         .specifier = input_specifier,
                         .source_url = input_specifier.createIfDifferent(path.text),
                         .hash = 0,
-                        .jsvalue_for_export = parse_result.ast.parts.@"[0]"().stmts[0].data.s_expr.value.toJS(allocator, globalObject orelse jsc_vm.global) catch @panic("Unexpected JS error"),
+                        .jsvalue_for_export = parse_result.ast.parts.@"[0]"().stmts[0].data.s_expr.value.toJS(allocator, globalObject orelse jsc_vm.global) catch |e| panic("Unexpected JS error: {s}", .{@errorName(e)}),
                         .tag = .exports_object,
                     };
                 }