Issues

• ext: remove residual per-operation costs on the foreign hot path (pending-exception TLS read, comparisons, slices)

  rotnov/pycc#1518 · Filter by author rotnov opened on Oct 10, 2026 · product-sprint-1

• ext: build an optimized artifact (shim at -O2; no debug runtime in an --ext artifact)

  rotnov/pycc#1516 · Filter by author rotnov opened on Oct 10, 2026 · product-sprint-1

• ext: the lark #1207 subject runs ~2x slower than CPython; profile and remove the dominant boundary costs

  rotnov/pycc#1514 · Filter by author rotnov opened on Oct 10, 2026 · product-sprint-1
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• print() of a tuple panics pycc_codegen (string conversion of tuple[...] unsupported)

  rotnov/pycc#1492 · Filter by author rotnov opened on Oct 7, 2026 · product-sprint-1

• Narrow the embedded executable's slot-dunder C0003 to classes whose instances can reach CPython

  rotnov/pycc#1473 · Filter by author rotnov opened on Oct 7, 2026 · product-sprint-1

• Compiler panic: C[int](...) on a non-generic class reaches MIR as GenericClassInstantiate

  rotnov/pycc#1399 · Filter by author rotnov opened on Oct 5, 2026 · product-sprint-1

• Mangle a private attribute name on an instance (self.__x is _C__x)

  rotnov/pycc#1392 · Filter by author rotnov opened on Sep 30, 2026 · v0.4

• A PEP 695 generic anywhere in a module breaks a foreign class call (T0021 call to undefined function)

  rotnov/pycc#1391 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• A PEP 695 generic with an unannotated non-T parameter leaves T unresolved (false T0022 at the definition)

  rotnov/pycc#1390 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• Infer object through a helper's parameter in the constraint solver (Part 3 of #1333)

  rotnov/pycc#1364 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• Iterate a CPython object with for inside a function body (Part 2 of #1333)

  rotnov/pycc#1363 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• A comprehension over a dict that grows the dict hangs instead of raising RuntimeError

  rotnov/pycc#1361 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• Solver: track a set-typed name's element type for a comprehension loop variable in an unannotated helper

  rotnov/pycc#1360 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• isinstance(<effectful expr>, T) never evaluates its first argument when the answer is static

  rotnov/pycc#1359 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• Part 7 of #1284: foreign staticmethod class attribute through super()

  rotnov/pycc#1358 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• super().__init__() in a user exception class's __init__ panics at run time

  rotnov/pycc#1354 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• A class pattern naming a subclass matches an instance of the base class

  rotnov/pycc#1353 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• Typing cast to a base class hides the subclass's class attributes and identity

  rotnov/pycc#1352 · Filter by author rotnov opened on Sep 30, 2026 · product-sprint-1

• Importing a subclass whose base its module imported panics in pycc_hir::import

  rotnov/pycc#1351 · Filter by author rotnov opened on Sep 25, 2026 · product-sprint-1

• Part 6 of #1284: lift the subclass-override refusal for instance receivers of a foreign staticmethod attribute

  rotnov/pycc#1350 · Filter by author rotnov opened on Sep 25, 2026 · product-sprint-1

• Part 5 of #1284: evaluate a foreign class attribute once at class creation, as CPython does

  rotnov/pycc#1349 · Filter by author rotnov opened on Sep 25, 2026 · product-sprint-1

• Part 4 of #1284: other non-literal class-attribute initialisers (foreign values, calls, names, containers, annotated spelling)

  rotnov/pycc#1348 · Filter by author rotnov opened on Sep 25, 2026 · product-sprint-1

• Part 3 of #1284: staticmethod/classmethod(...) of a pycc-native function as a class attribute

  rotnov/pycc#1347 · Filter by author rotnov opened on Sep 25, 2026 · product-sprint-1

• Part 2 of #1332: set[C]/frozenset[C] of a hashable user class

  rotnov/pycc#1336 · Filter by author rotnov opened on Sep 25, 2026 · product-sprint-1
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• Bind, return and pass a CPython object inside a function body (I0404 today)

  rotnov/pycc#1333 · Filter by author rotnov opened on Sep 25, 2026 · product-sprint-1
  1