Undefined array key "currentUri" in [...]Mapped.php Line 68 when using @import (inline)

[CSS-Regiogate]

I use (at)import (inline) to read the contents of a css file containing my container queries (since they are not yet supportet).
This worked fine up to version 4.2.1.
In Version 4.3.0 it breaks with "Undefined array key "currentUri" in [...]Mapped.php Line 68"

The reason is that in Import.php, Line 179 the empty array for $currentFileInfo has been replaced by one containing two keys, but not the "currentUri" key, leading to the mentioned error in Mapped.php, where this key is read without checking its existence. The only check here is if the array is not falsy.

[Krinkle]

Thank you for reporting this bug. Would you like to try to write a patch for this?