# Basic info <!--- Add commit SHA used to reproduce --> - Present with df307502f3a401c8319e4ed45bfb519c52fcae36 (tested on macOS) # Bug description Missing `pop_wmops()` can cause unbalanced push/pop calls leading to the following error: ``` update_wmops(): WMOPS caller stack corrupted - check that all push_wmops() are matched with pop_wmops()! ``` The cause seems to be a missing `pop_wmops()` in `vbap_init_data()`: https://forge.3gpp.org/rep/sa4/audio/ivas-basop/-/blob/main/lib_rend/ivas_vbap.c#L470 This is present in the inactive float code lower down: https://forge.3gpp.org/rep/sa4/audio/ivas-basop/-/blob/main/lib_rend/ivas_vbap.c#L719 # Ways to reproduce Decode this bitstream with an instrumented FX decoder: [ltv48_MC51_MC_5_1_ball_wb_rs_fer_ep_10pct_fer_g192.192.zip](/uploads/4c2c2d3237ad5f36d6f071deaebca7a6/ltv48_MC51_MC_5_1_ball_wb_rs_fer_ep_10pct_fer_g192.192.zip) ``` ./IVAS_cod -mc 5_1 -max_band wb scripts/switchPaths/sw_13k2_512k.bin 16 ltv48_MC51_16_5_1.pcm bit eid-xor -vbr -fer bit ep_10pct_fer.g192 bit_err ./IVAS_dec 7_1_4 16 bit_err out ```