May 11, 2019
https://issues.dlang.org/show_bug.cgi?id=19860

          Issue ID: 19860
           Summary: Memory corruption in nested templates
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: critical
          Priority: P1
         Component: druntime
          Assignee: nobody@puremagic.com
          Reporter: faissaloo@gmail.com

https://github.com/faissaloo/uranium
I was working on the above project and came across an issue where nesting my
U!() template within the render() causes what seems to be a dangling pointer.
Uncommenting the last test in component_tests.d demonstrates this issue.

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