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-rw-r--r--src/mesa/main/marshal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mesa/main/marshal.c b/src/mesa/main/marshal.c
index 9c9d6720878..b2935f63753 100644
--- a/src/mesa/main/marshal.c
+++ b/src/mesa/main/marshal.c
@@ -111,7 +111,7 @@ _mesa_marshal_ShaderSource(GLuint shader, GLsizei count,
measure_ShaderSource_strings(count, string, length, length_tmp);
size_t total_cmd_size = fixed_cmd_size + length_size + total_string_length;
- if (total_cmd_size <= MARSHAL_MAX_CMD_SIZE) {
+ if (total_cmd_size <= MARSHAL_MAX_CMD_SIZE && count > 0) {
struct marshal_cmd_ShaderSource *cmd =
_mesa_glthread_allocate_command(ctx, DISPATCH_CMD_ShaderSource,
total_cmd_size);