XS appears to incorrectly ignore comma at end-of-line

[gibson042]

Environment: XS 11.6.0 32 4

Description
XS appears to incorrectly allow automatic semicolon insertion to terminate a statement that includes a comma before a LineTerminator.

Steps to Reproduce
Execute the following syntactically incorrect code:

const a = 0,
const b = 1;
print(a, b);

Expected behavior
No code is evaluated and a syntax error is reported.

Actual behavior
a and b bindings are created and the print reports corresponding values.

0 1

[phoddie]

FYI – XS also accepts this line, so the issue isn't related to automatic semicolon insertion.

const a = 0, ; const b = 1;

This is expected to be fixed in XS13.

[phoddie]

Fixing this broke our build because ssl_handshake.js used commas at the end of a few lines where it should have used semicolons. That's fixed now too.