disable Lin Thread test under bytecode

Author: jmid

src/neg_tests/dune

@@ -13,7 +13,7 @@
    ;; Lin tests
    lin_tests_domain.exe ;; currently not run on CI
    lin_tests_effect.exe ;; currently not run on CI
-   lin_tests_thread_ref.exe
+   lin_tests_thread_ref.exe ;; currently disabled under bytecode mode
    lin_tests_thread_conclist.exe
    ;; Lin_api tests
    lin_tests_dsl_domain.exe

src/neg_tests/lin_tests_thread_ref.ml

@@ -3,6 +3,10 @@ open Lin_tests_common
 (** This is a driver of the negative ref tests over the Thread module *)
 
 ;;
+if Sys.backend_type = Sys.Bytecode
+then
+  Printf.printf "Lin ref tests with Thread disabled under bytecode\n\n%!"
+else
 QCheck_base_runner.run_tests_main
   (let count = 1000 in
    [RT_int.lin_test       `Thread ~count ~name:"Lin ref int test with Thread"; (* unboxed, hence no allocations to trigger context switch *)