Improve assertions.

1 files changed, 2 insertions, 4 deletions

diff --git a/src/lib_io.c b/src/lib_io.c
index 5e9d0d66..c7d1bb31 100644
--- a/src/lib_io.c
+++ b/src/lib_io.c
@@ -101,9 +101,6 @@ static int io_file_close(lua_State *L, IOFileUD *iof)
     stat = pclose(iof->fp);
 #elif LJ_TARGET_WINDOWS && !LJ_TARGET_XBOXONE && !LJ_TARGET_UWP
     stat = _pclose(iof->fp);
-#else
-    lua_assert(0);
-    return 0;
 #endif
 #if LJ_52
     iof->fp = NULL;
@@ -112,7 +109,8 @@ static int io_file_close(lua_State *L, IOFileUD *iof)
     ok = (stat != -1);
 #endif
   } else {
-    lua_assert((iof->type & IOFILE_TYPE_MASK) == IOFILE_TYPE_STDF);
+    lj_assertL((iof->type & IOFILE_TYPE_MASK) == IOFILE_TYPE_STDF,
+               "close of unknown FILE* type");
     setnilV(L->top++);
     lua_pushliteral(L, "cannot close standard file");
     return 2;