Use of uninitialized value $ROOT_PID in numeric ne (!=)

[atoomic]

Discover this issue while running our test suite using yath

( STDERR )  job 1407    ----- START -----
Use of uninitialized value $ROOT_PID in numeric ne (!=) at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test2/Formatter/Stream.pm line 81.
new_root called from child process! at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test2/Formatter/Stream.pm line 81.
	Test2::Formatter::Stream::new_root("Test2::Formatter::Stream") called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test2/API/Stack.pm line 31
	Test2::API::Stack::new_hub(Test2::API::Stack=ARRAY(0x1571fb8)) called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test2/API/Stack.pm line 47
	Test2::API::Stack::top(Test2::API::Stack=ARRAY(0x1571fb8)) called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test2/API.pm line 325
	Test2::API::context("level", 2, "fudge", 1, "stack", Test2::API::Stack=ARRAY(0x1571fb8), "hub", undef, ...) called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test/Builder.pm line 158
	Test::Builder::ctx(Test::Builder=HASH(0x13287c0)) called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test/Builder.pm line 410
	Test::Builder::reset(Test::Builder=HASH(0x13287c0), "singleton", 1) called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test/Builder.pm line 111
	Test::Builder::__ANON__() called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test2/API/Instance.pm line 319
	Test2::API::Instance::load(Test2::API::Instance=HASH(0x1403ec8)) called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test2/API.pm line 168
	Test2::API::test2_load() called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test/Builder/Module.pm line 78
	Test::Builder::Module::import("Test::Builder::Module") called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test/More.pm line 22
	Test::More::BEGIN() called at /usr/local/cpanel/3rdparty/perl/526/lib64/perl5/cpanel_lib/Test/More.pm line 22

[exodist]

The real issue here is new_root called from child process! This is an intentional error to tell you that the test does something problematic. The easiest solution may be to add this header to the test:

# HARNESS-NO-STREAM

This error means that you either preloaded something that cannot be preloaded (IE something that sends test events like diag, note, ok, etc). Or it means you forked before the formatter was initialized (IE forking before test2 is ready for you to do so)

Without seeing the code I cannot really dive much deeper. A minimal reproduction test case (including any preloads neede dot make it occur) would be helpful.

[exodist]

As for the warning, that should be fixed. I suspect it will always have the warning when the error is triggered, I will look into that part.

[atoomic]

Thanks @exodist indeed HARNESS-NO-STREAM fixes this issue

[exodist]

A lot of fixes have happened to the stream formatter. This is probably fixed. It was also never proven this was a yath issue as opposed to a misbehaving test.