1 files changed, 4 insertions, 2 deletions

diff --git a/src/lj_clib.c b/src/lj_clib.c
index 2ea6ff45..8da41a83 100644
--- a/src/lj_clib.c
+++ b/src/lj_clib.c
@@ -350,7 +350,8 @@ TValue *lj_clib_index(lua_State *L, CLibrary *cl, GCstr *name)
       lj_err_callerv(L, LJ_ERR_FFI_NODECL, strdata(name));
     if (ctype_isconstval(ct->info)) {
       CType *ctt = ctype_child(cts, ct);
-      lua_assert(ctype_isinteger(ctt->info) && ctt->size <= 4);
+      lj_assertCTS(ctype_isinteger(ctt->info) && ctt->size <= 4,
+                   "only 32 bit const supported");  /* NYI */
       if ((ctt->info & CTF_UNSIGNED) && (int32_t)ct->size < 0)
         setnumV(tv, (lua_Number)(uint32_t)ct->size);
       else
@@ -362,7 +363,8 @@ TValue *lj_clib_index(lua_State *L, CLibrary *cl, GCstr *name)
 #endif
       void *p = clib_getsym(cl, sym);
       GCcdata *cd;
-      lua_assert(ctype_isfunc(ct->info) || ctype_isextern(ct->info));
+      lj_assertCTS(ctype_isfunc(ct->info) || ctype_isextern(ct->info),
+                   "unexpected ctype %08x in clib", ct->info);
 #if LJ_TARGET_X86 && LJ_ABI_WIN
       /* Retry with decorated name for fastcall/stdcall functions. */
       if (!p && ctype_isfunc(ct->info)) {