mesa: Free all shader program data before deleting all

shader/shader program objects to avoid memory access error.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mesa/shader/shader_api.c b/src/mesa/shader/shader_api.c
index df2f9dcec81..01a237c525a 100644
--- a/src/mesa/shader/shader_api.c
+++ b/src/mesa/shader/shader_api.c
@@ -127,6 +127,8 @@ _mesa_free_shader_program_data(GLcontext *ctx,
    for (i = 0; i < shProg->NumShaders; i++) {
       _mesa_reference_shader(ctx, &shProg->Shaders[i], NULL);
    }
+   shProg->NumShaders = 0;
+
    if (shProg->Shaders) {
       _mesa_free(shProg->Shaders);
       shProg->Shaders = NULL;