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-rw-r--r--src/mesa/main/varray.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/main/varray.c b/src/mesa/main/varray.c
index 9acd8686621..0f7777bfe3c 100644
--- a/src/mesa/main/varray.c
+++ b/src/mesa/main/varray.c
@@ -333,6 +333,9 @@ update_array_format(struct gl_context *ctx,
GLbitfield typeBit;
GLenum format = GL_RGBA;
+ /* at most, one of these bools can be true */
+ assert((int) normalized + (int) integer + (int) doubles <= 1);
+
if (ctx->Array.LegalTypesMask == 0 || ctx->Array.LegalTypesMaskAPI != ctx->API) {
/* Compute the LegalTypesMask only once, unless the context API has
* changed, in which case we want to compute it again. We can't do this