Deprecate passing null to non-nullable arg of internal function

This deprecates passing null to non-nullable scale arguments of
internal functions, with the eventual goal of making the behavior
consistent with userland functions, where null is never accepted
for non-nullable arguments.

This change is expected to cause quite a lot of fallout. In most
cases, calling code should be adjusted to avoid passing null. In
some cases, PHP should be adjusted to make some function arguments
nullable. I have already fixed a number of functions before landing
this, but feel free to file a bug if you encounter a function that
doesn't accept null, but probably should. (The rule of thumb for
this to be applicable is that the function must have special behavior
for 0 or "", which is distinct from the natural behavior of the
parameter.)

RFC: https://wiki.php.net/rfc/deprecate_null_to_scalar_internal_arg

Closes GH-6475.

1 files changed, 1 insertions, 1 deletions

diff --git a/run-tests.php b/run-tests.php
index fb270f0adf..c6e27e42ea 100755
--- a/run-tests.php
+++ b/run-tests.php
@@ -3385,7 +3385,7 @@ function clear_show_test(): void
     // Parallel testing
     global $workerID;
 
-    if (!$workerID) {
+    if (!$workerID && isset($line_length)) {
         // Write over the last line to avoid random trailing chars on next echo
         echo str_repeat(" ", $line_length), "\r";
     }