Crash when mining with AMD (Mac Pro)

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Describe the bug

The "ocl_cuckaroo" plugin crashes immediately on my Mac Pro. Here is the section of "grin-miner.toml" with applicable configurations:
plugin_name = "ocl_cuckaroo"
[mining.miner_plugin_config.parameters]
platform = 0
device = 1

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To Reproduce
Steps to reproduce the behavior:

1. Run in 3 terminal windows: './grin', './grin wallet listen', './grin-miner'
2. Expect mining via the GPU
3. Switch to the "grin-miner" terminal window
4. See error

Relevant Information

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Screenshots

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Desktop (please complete the following information):

• OS: macOS Mojave
• Version: 10.14.3
• Hardware: Mac Pro (2012) with 2 CPU's (12 cores total), 40 GB RAM,
• GPU: Sapphire AMD Radeon NITRO+ RX 580 8GB

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Additional context
Please note that the "ocl_cuckatoo" plugin runs, but no shares are accepted, The "cuckaroo_cpu_compat_29" plugin, works OK. Screen prints are as follows:

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(I have also reported this crash in the "Grin-Miner" repository-- mimblewimble/grin-miner#199 (comment))

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No need to report also here