GC: writeJsonSummary writes file with interleaved null characters

[N-o-Z]

The function uses stream.writeChars on a JObject which results in a an invalid string, which causes an exception when trying to read into json object afterwards

[�, {, �, ", �, r, �, u, �, n, �, _, �, i, �, d, �, ", �, :, �, ", �, 1, �, 4, �, 1, �, 9, �, f, �, c, �, e, �, a, �, -, �, a, �, 4, �, 4, �, 1, �, -, �, 4, �, 9, �, 7, �, b, �, -, �, b, �, 3, �, 0, �, 1, �, -, �, 2, �, 4, �, 6, �, c, �, 7, �, f, �, 3, �, 6, �, 0, �, 1, �, b, �, a, �, ", �, ,, �, ", +178 more]

Suggested solution to use writeBytes instead

[N-o-Z]

@Jonathan-Rosenberg FYI

[arielshaqed]

Analysis

writeJsonSummary uses DataOutputStream.writeChars, which writes each char of the String as if using DataOutputStream.writeChar, which literally says it does a bad UTF-16 impression:

Writes a char to the underlying output stream as a 2-byte value, high byte first. If no exception is thrown, the counter written is incremented by 2.

We shouldn't use that function 🤷🏽 .