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--- gpio.cpp 2017-09-16 22:30:43.024838955 +0000 +++ gpio.cpp 2017-09-16 22:30:25.845324303 +0000 @@ -244,6 +244,7 @@ if (1 != write(fd, &value_str[LOW==value?0:1], 1)) { DEBUG_PRINT("failed to write value on pin "); + exit(1); } }