1 files changed, 3 insertions, 2 deletions

diff --git a/src/lj_cconv.h b/src/lj_cconv.h
index 2d1cb273..45b0ca1e 100644
--- a/src/lj_cconv.h
+++ b/src/lj_cconv.h
@@ -27,13 +27,14 @@ enum {
 static LJ_AINLINE uint32_t cconv_idx(CTInfo info)
 {
   uint32_t idx = ((info >> 26) & 15u);  /* Dispatch bits. */
-  lua_assert(ctype_type(info) <= CT_MAYCONVERT);
+  lj_assertX(ctype_type(info) <= CT_MAYCONVERT,
+             "cannot convert ctype %08x", info);
 #if LJ_64
   idx = ((uint32_t)(U64x(f436fff5,fff7f021) >> 4*idx) & 15u);
 #else
   idx = (((idx < 8 ? 0xfff7f021u : 0xf436fff5) >> 4*(idx & 7u)) & 15u);
 #endif
-  lua_assert(idx < 8);
+  lj_assertX(idx < 8, "cannot convert ctype %08x", info);
   return idx;
 }