[Issue 21336] New: [2.094.1] Memory corruption of TemplateInstance

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21336

          Issue ID: 21336
           Summary: [2.094.1] Memory corruption of TemplateInstance
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: regression
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: uplink.coder at gmail.com

Created attachment 1809
  --> https://issues.dlang.org/attachment.cgi?id=1809&action=edit
testcase for the issue.

Since the new version of dmd the code in the archive attached to this bug
report fails.

to reproduce untar the archive cd into repro.reduced and run ../bld.sh

You will see it segfault with 2.094.1
But succeeded with 2.094.0

The root cause for this, is stale data kept around in a memory pool.

Introduced in https://github.com/dlang/dmd/pull/11381

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