Issues

• GMP build aborts with a core dump on rx/ry/rz(θ) instead of exiting with an error

  bug
  QuantumFIT/MEDUSA#55 · Filter by author ondrik opened on Oct 16, 2026

• MoToBuddy's garbage-collection messages flood stdout and mix into --measure output

  bug
  QuantumFIT/MEDUSA#54 · Filter by author ondrik opened on Oct 16, 2026

• GCC < 11 fails deep inside MoToBuddy with no hint about the compiler

  bug
  QuantumFIT/MEDUSA#52 · Filter by author ondrik opened on Oct 15, 2026

• make does not notice when lib/MoToBuddy is not at the pinned commit

  bug
  QuantumFIT/MEDUSA#51 · Filter by author ondrik opened on Oct 15, 2026

• Performance roadmap (tracking)

  enhancement
  QuantumFIT/MEDUSA#40 · Filter by author ondrik opened on Sep 25, 2026

• MOSF phase_mul keys the apply cache on a freed heap pointer (wrong phase on address reuse)

  bug
  QuantumFIT/MEDUSA#39 · Filter by author ondrik opened on Sep 25, 2026

• perf: memoise the C++ traverse/lockstep combinators (exponential on shared subdiagrams)

  enhancement
  QuantumFIT/MEDUSA#38 · Filter by author ondrik opened on Sep 25, 2026

• perf: GMP backend - reduce the deferred sqrt2 exponent, cut allocation churn, int64 fast path

  enhancement
  QuantumFIT/MEDUSA#37 · Filter by author ondrik opened on Sep 25, 2026
  

• perf: flat one-block symbolic expressions, allocate only on intern miss

  enhancement
  QuantumFIT/MEDUSA#36 · Filter by author ondrik opened on Sep 25, 2026
  

• perf: single-qubit gates walk the same node pairs twice (H, Y, rx/ry)

  enhancement
  QuantumFIT/MEDUSA#35 · Filter by author ondrik opened on Sep 25, 2026
  

• perf: cheaper terminal hash/compare; level test missing in mtbdd_findterminal

  enhancement
  QuantumFIT/MEDUSA#34 · Filter by author ondrik opened on Sep 25, 2026
  2

  

• perf: detect loop-head state cycles in concrete loop simulation (LP-PeriodFinding)

  enhancement
  QuantumFIT/MEDUSA#32 · Filter by author ondrik opened on Sep 25, 2026
  

• Measurement sampling is O(samples x qubits x paths); histogram sized n^3 overflows

  bug
  QuantumFIT/MEDUSA#31 · Filter by author ondrik opened on Sep 25, 2026
  

• perf: short-circuit T*1, T+0 and the absent-variable cofactor in the gate primitives

  enhancement
  QuantumFIT/MEDUSA#30 · Filter by author ondrik opened on Sep 25, 2026
  1

  

• Dead post-timer qBDD_total_prob walk dominates wall time; add --no-dot, record Time=

  bug
  QuantumFIT/MEDUSA#29 · Filter by author ondrik opened on Sep 25, 2026

• make test -jN: parallel suites rebuild/relink the same MEDUSA_buddy_doubles_f128 binary, causing spurious failures

  bug
  QuantumFIT/MEDUSA#25 · Filter by author ondrik opened on Sep 21, 2026

• perf: concrete loops re-parse the loop body from the file on every iteration

  enhancement
  QuantumFIT/MEDUSA#22 · Filter by author ondrik opened on Sep 21, 2026
  

• accuracy: snap-to-grid does not merge near-equal leaves across a grid boundary (f64 has 2x the terminals of f128 on LP-Grover)

  enhancement
  QuantumFIT/MEDUSA#21 · Filter by author ondrik opened on Sep 21, 2026
  3

• perf: gate_mcx (C path) makes 5 + 3*(controls-1) full apply passes per gate

  enhancement
  QuantumFIT/MEDUSA#20 · Filter by author ondrik opened on Sep 21, 2026
  1

  

• perf: every intermediate leaf value is malloc'ed and freed - 14 % of instructions in malloc/free

  enhancement
  QuantumFIT/MEDUSA#18 · Filter by author ondrik opened on Sep 21, 2026
  1

• perf: initPackage(0,0,0) sizes the BuDDy node table and cache at 10 000 - thousands of GCs per run

  enhancement
  QuantumFIT/MEDUSA#17 · Filter by author ondrik opened on Sep 21, 2026
  2

• Remove/fix unused code discovered by CI coverage

  QuantumFIT/MEDUSA#12 · Filter by author s-jobra opened on Sep 18, 2026
  1