Code size report:

   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:  +152 +0.019% standard[incl +32(data)]
      stm32:  +132 +0.034% PYBV10
     mimxrt:  +136 +0.037% TEENSY40
        rp2:  +128 +0.039% RPI_PICO
       samd:  +140 +0.053% ADAFRUIT_ITSYBITSY_M4_EXPRESS

I see that the Unix tests that expected to see the ECONNRESET exception have failed.
Without this commit, my ESP32 client reading from a Unix micropython server would get ECONNRESET errors, though a Unix client didn't.

@ned-pcs this makes the those tests pass

...
 except OSError as exc:
    if exc.errno in (ECONNRESET, EPIPE) and r:
        return r
    raise

Could this work in ESP32? 👀

Can you please provide a minimal Python example that shows the problem you are encountering?

@Carglglz I tried the logic you showed ( if exc.errno in (ECONNRESET, EPIPE) and r:) but that didn't eliminate the problem on the ESP32 side.
@dpgeorge My current test program uses Microdot as a server; I will write a simplified version that doesn't use Microdot when I get some time.

@ned-pcs I think this can be closed, see #13533 for a possible fix.

@Carglglz I have tested your #13533 fix and it works. Closing.