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Fix issue with ScheduleBlock qpy serialization and use_symengine (backport #11261) #11275

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merged 1 commit into from
Nov 18, 2023

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@mergify mergify bot commented Nov 18, 2023

This is an automatic backport of pull request #11261 done by Mergify.


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* Fix issue with ScheduleBlock qpy serialization and use_symengine

This commit fixes an issue with the use_symengine flag on the qpy.dump()
function. Previously in certain conditions a symengine expression that
was listed in the qpy header as being encoded via symengine was
incorrectly being serialized using sympy. This would cause a failure on
deserialialization as the qpy payload was invalid and symengine could
not parse a symengine representation.

This was originally caught during the development of #10902 as that
switches the default of use_symengine to ``True`` as it makes symengine
a hard requirement. This commit splits it out so the isolated fix can be
backported to 0.45.1.

* Skip symengine test if symengine isn't installed

* Fix skip syntax

* Update releasenotes/notes/fix-schedule-qpy-use-symengine-05ae1dfab73e3ff8.yaml

Co-authored-by: Jake Lishman <jake@binhbar.com>

---------

Co-authored-by: Jake Lishman <jake@binhbar.com>
(cherry picked from commit 1dd4f54)
@mergify mergify bot requested a review from a team as a code owner November 18, 2023 01:46
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@github-actions github-actions bot added Changelog: Bugfix Include in the "Fixed" section of the changelog mod: qpy Related to QPY serialization labels Nov 18, 2023
@github-actions github-actions bot added this to the 0.45.1 milestone Nov 18, 2023
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Pull Request Test Coverage Report for Build 6911022261

  • 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
  • 11 unchanged lines in 3 files lost coverage.
  • Overall coverage increased (+0.02%) to 86.95%

Files with Coverage Reduction New Missed Lines %
crates/qasm2/src/expr.rs 1 93.76%
crates/qasm2/src/lex.rs 4 91.16%
crates/qasm2/src/parse.rs 6 97.6%
Totals Coverage Status
Change from base Build 6899193490: 0.02%
Covered Lines: 74207
Relevant Lines: 85344

💛 - Coveralls

@jakelishman jakelishman added this pull request to the merge queue Nov 18, 2023
Merged via the queue into stable/0.45 with commit 247746b Nov 18, 2023
16 checks passed
@mergify mergify bot deleted the mergify/bp/stable/0.45/pr-11261 branch November 18, 2023 09:44
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