Method fail

Lib/test/support/script_helper.py:63–90

Provide helpful details about failed subcommand runs

(self, cmd_line)

                                          ("rc", "out", "err"))):
    """Helper for reporting Python subprocess run results"""
    def fail(self, cmd_line):
        """Provide helpful details about failed subcommand runs"""
        # Limit to 300 lines of ASCII characters
        maxlen = 300 * 100
        out, err = self.out, self.err
        if len(out) > maxlen:
            out = b'(... truncated stdout ...)' + out[-maxlen:]
        if len(err) > maxlen:
            err = b'(... truncated stderr ...)' + err[-maxlen:]
        out = out.decode('utf8', 'replace').rstrip()
        err = err.decode('utf8', 'replace').rstrip()

        exitcode = self.rc
        signame = support.get_signal_name(exitcode)
        if signame:
            exitcode = f"{exitcode} ({signame})"
        raise AssertionError(f"Process return code is {exitcode}\n"
                             f"command line: {cmd_line!r}\n"
                             f"\n"
                             f"stdout:\n"
                             f"---\n"
                             f"{out}\n"
                             f"---\n"
                             f"\n"
                             f"stderr:\n"
                             f"---\n"
                             f"{err}\n"
                             f"---")


# Executing the interpreter in a subprocess