False positive running MISRA C:2023 rule 10.6 violation

[kylejacksonb]

I've been running into another MISRA C:2023 rule violation for the following code:

typedef unsigned char      uint8_t;  
typedef unsigned short     uint16_t;
extern volatile uint8_t REG_DATA_IN;
uint8_t read( const uint16_t adr ) 
{  uint8_t io_data = REG_DATA_IN;  return io_data;}

void rgBusSetBit( const uint16_t adr, const uint8_t mask) 
{  const uint8_t var = read( adr );  write( adr, (var | mask));}

Obviously the read function returns uint8_t, but the assignment to const uint8_t var seems to violate rule 10.6.

From my point of view both should be of the same essential type and not an MISRA issue.
Could you please have a look on this?

[jasonbquinn]

Fixed with https://github.com/stinb/sti/commit/4313237620e24287f45ff28c623f3331a73a91a6

[kylejacksonb]

Thanks Quinn.

[kylejacksonb]

User is still seeing this false positive. I'm also seeing it on Windows.

[jasonbquinn]

Ok those bad merges are fixed so this shouldn't flag again.