plugins not loaded when setMergeCompiledIncludes is true

[artcs]

With 3.1.32 sometimes modifier plugins are not loaded when setMergeCompiledIncludes is set to true:

[25-Apr-2018 12:28:46 Europe/Berlin] PHP Fatal error: Call to undefined function smarty_modifier_truncate() in /pathto/var/smarty/tc/af65f1f22c72d1d1f57baa3e9fd13ad52f24362b_1.file.fdview.tpl.php on line 162

After deleting compiled templates the first call works fine, subsequent calls fail. Caching is off.
As a workaround if I set setMergeCompiledIncludes to false, it works as expected.
Issue started with dev45-version from March 28th.

Testcase:

index.tpl:

{include file="included.tpl"}
bla bla

included.tpl:

{"Something"|truncate:7:'...'}

index.php:

[...]
$Smarty->setMergeCompiledIncludes(true);
$Smarty->display('index.tpl');

[thedotedge]

I can reproduce with 3.1.32 if setMergeCompiledIncludes(true) is called.

[uwetews]

This bug is now fixed in the master branch and will later be included in 3.1.33