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-rw-r--r--src/mesa/vbo/vbo_exec_api.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/vbo/vbo_exec_api.c b/src/mesa/vbo/vbo_exec_api.c
index 9de2886c499..3943523b702 100644
--- a/src/mesa/vbo/vbo_exec_api.c
+++ b/src/mesa/vbo/vbo_exec_api.c
@@ -423,6 +423,9 @@ vbo_exec_fixup_vertex(struct gl_context *ctx, GLuint attr, GLuint newSize, GLenu
do { \
struct vbo_exec_context *exec = &vbo_context(ctx)->exec; \
int sz = (sizeof(C) / sizeof(GLfloat)); \
+ \
+ assert(sz == 1 || sz == 2); \
+ \
if (unlikely(!(ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT))) { \
vbo_exec_BeginVertices(ctx); \
} \