panic if `RETURN_CODE_DROPPED` returned for `future.read` (#186) #172

Job	Run time
Build Python sdist	47s
Populate cache	16m 50s
Build and release (ubuntu-latest, aarch64, aarch64, WebAssembly, x86_64-linux, --target aarch64-u...	18m 59s
Build and release (windows-latest, amd64, x64, WebAssembly, x86_64-windows, .exe, target/release)	29m 10s
Build and release (macos-latest, aarch64, aarch64, WebAssembly, arm64-macos, --target aarch64-app...	17m 25s
Build and release (ubuntu-latest, amd64, x86_64, dicej, x86_64-linux, target/release)	16m 12s
Build and release (macos-latest, amd64, x86_64, WebAssembly, arm64-macos, target/release)	18m 53s
Generate checksums	8s
Update canary release	48s
	1h 59m 12s

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