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Qiskit / qiskit / 17939752499
88%
main: 88%

Build:
Build:
LAST BUILD BRANCH: add-litinski-to-asv
DEFAULT BRANCH: main
Ran 23 Sep 2025 08:51AM UTC
Jobs 1
Files 868
Run time 2min
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23 Sep 2025 08:10AM UTC coverage: 88.307% (+0.02%) from 88.289%
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Fix edge-order non-determinism when adding DAG nodes (#15040)

All of `DAGCircuit::push_back`, `DAGCircuit::push_front` and
`DAGCircuitBuilder::push_back` had non-determinisms in the precise order
that edges were added.  The two `DAGCircuit` methods had diverged, so
exhibited _different_ behaviour.  Most of the effects were limited to
nodes with multiple classical in edges, though `DAGCircuit::push_back`
did have some problems with high-degree quantum nodes (like barriers) as
well.

This commit unifies the code handled the two `DAGCircuit` methods to try
and prevent divergences (especially since `apply_operation_front` is
currently little used and little tested).  As a side effect, this fixed
a bug in `apply_operation_front` around handling multiple references to
the same clbit or var in classical expressions that was fixed in
`apply_operation_back` some time prior.

34 of 34 new or added lines in 1 file covered. (100.0%)

7 existing lines in 4 files now uncovered.

92737 of 105017 relevant lines covered (88.31%)

935732.71 hits per line

Uncovered Existing Lines

Lines Coverage ∆ File
1
82.79
0.0% crates/circuit/src/parameter/parameter_expression.rs
1
72.82
-0.04% crates/circuit/src/parameter/symbol_expr.rs
1
93.63
-0.25% crates/qasm2/src/expr.rs
4
92.27
0.26% crates/qasm2/src/lex.rs
Jobs
ID Job ID Ran Files Coverage
1 17939752499.1 23 Sep 2025 08:51AM UTC 868
88.31
GitHub Action Run
Source Files on build 17939752499
  • Tree
  • List 868
  • Changed 7
  • Source Changed 1
  • Coverage Changed 7
Coverage ∆ File Lines Relevant Covered Missed Hits/Line
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