Sep 13, 2026 – Sep 19, 2026

cg_llvm: Move all code out of the crate root Rust · 509 + / 500 −

Introduces 52 new declarations in compiler/rustc_codegen_llvm/src/lib.rs.

Adds new language design rather than adjusting what was there. Read the linked PR for the surrounding test context.

compiler/rustc_codegen_llvm/src/lib.rs ↗ · 10 files

@@ -69,467 +42,3 @@ mod type_of; mod typetree; mod va_arg; mod value;--pub(crate) use macros::TryFromU32;--#[derive(Clone)]-pub struct LlvmCodegenBackend(());--struct TimeTraceProfiler {}--impl TimeTraceProfiler {-    fn new() -> Self {-        unsafe { llvm::LLVMRustTimeTraceProfilerInitialize() }-        TimeTraceProfiler {}-    }-}--impl Drop for TimeTraceProfiler {-    fn drop(&mut self) {-        unsafe { llvm::LLVMRustTimeTraceProfilerFinishThread() }-    }-}--impl ExtraBackendMethods for LlvmCodegenBackend {-    type Module = ModuleLlvm;--    fn codegen_allocator<'tcx>(-        &self,-        tcx: TyCtxt<'tcx>,-        module_name: &str,-        methods: &[AllocatorMethod],-    ) -> ModuleLlvm {

fix(cli): preserve double dash before the entrypointRust · 188 + / 0 −

Introduces 8 new declarations in libs/cli_parser/src/tests.rs.

Adds new language design rather than adjusting what was there. Read the linked PR for the surrounding test context.

libs/cli_parser/src/tests.rs ↗ · 3 files

@@ -1195,6 +1214,48 @@ fn eval_print() {   assert_eq!(r.get_one("code_arg"), Some("1+1")); } +#[test]+fn eval_double_dash_before_code() {+  let r = parse(+    &TEST_ROOT,+    &svec!["deno", "eval", "--", "-1; console.log(0)", "arg1"],+  )+  .unwrap();+  assert_eq!(r.get_one("code_arg"), Some("-1; console.log(0)"));+  assert_eq!(r.trailing, vec!["arg1"]);+}++#[test]+fn eval_double_dash_before_code_keeps_second_separator() {+  // Only the first `--` is special (mirrors clap): it was consumed to make+  // the positional literal, so a later `--` is forwarded as-is even though+  // eval strips the separator in `deno eval code -- a`.+  let r =+    parse(&TEST_ROOT, &svec!["deno", "eval", "--", "code", "--", "a"]).unwrap();+  assert_eq!(r.get_one("code_arg"), Some("code"));+  assert_eq!(r.trailing, vec!["--", "a"]);+}++#[test]+fn upgrade_double_dash_stays_trailing() {+  // Commands without trailing var args don't enter positional-only mode:+  // `--` still starts (unused) trailing args, as before.+  let r =+    parse(&TEST_ROOT, &svec!["deno", "upgrade", "--", "v1", "v2"]).unwrap();+  assert_eq!(r.get_one("version-or-hash-or-channel"), None);+  assert_eq!(r.trailing, vec!["v1", "v2"]);

Add doctests to DFS and BFS. Contributes to #9943Python · 197 + / 67 −

Reworks 167 lines of existing logic in graphs/directed_and_undirected_weighted_graph.py.

Changes how existing core implementation behaves. Read the linked PR for the surrounding test context.

graphs/directed_and_undirected_weighted_graph.py ↗ · 2 files

@@ -23,53 +36,94 @@ def add_pair(self, u, v, w=1) -> None:             self.graph[v] = []      def all_nodes(self):+        """+        Returns list of all nodes in the graph.+        >>> dg = DirectedGraph()+        >>> dg.all_nodes()+        []+        >>> dg.add_pair(1,1)+        >>> dg.all_nodes()+        [1]+        >>> dg.add_pair(2,3,3)+        >>> dg.all_nodes()+        [1, 2, 3]+        """         return list(self.graph)      # handles if the input does not exist     def remove_pair(self, u, v) -> None:+        """+        Removes all edges u->v if it exists.+        >>> dg = DirectedGraph()+        >>> dg.remove_pair(1,2) # silently exits+        >>> dg.add_pair(0,5,2)+        >>> dg.graph[0]+        [[2, 5]]+        >>> dg.remove_pair(5,0)+        >>> dg.graph[0]+        [[2, 5]]+        >>> dg.remove_pair(0,5)+        >>> dg.graph[0]+        []+        """

ENH: speed up the fixed-width string casts and unicode scalarsC · 16 + / 11 −

Reworks 24 lines of existing logic in numpy/_core/src/multiarray/scalarapi.c.

Changes how existing core implementation behaves. Read the linked PR for the surrounding test context.

numpy/_core/src/multiarray/scalarapi.c ↗ · 3 files

@@ -500,25 +500,30 @@ PyArray_Scalar(void *data, PyArray_Descr *descr, PyObject *base)         }     }     if (type_num == NPY_UNICODE) {-        /* we need the full string length here, else copyswap will write too-           many bytes */-        void *buff = PyMem_RawMalloc(descr->elsize);-        if (buff == NULL) {-            return PyErr_NoMemory();-        }-        memcpy(buff, data, itemsize);-        if (swap) {-            byte_swap_vector(buff, itemsize / 4, 4);+        void *buff = NULL;+        const void *ucs4 = data;++        /* only copy when the data cannot be handed to CPython as it is */+        if (swap || !npy_is_aligned(data, NPY_ALIGNOF(Py_UCS4))) {+            buff = PyMem_RawMalloc(descr->elsize);+            if (buff == NULL) {+                return PyErr_NoMemory();+            }+            memcpy(buff, data, itemsize);+            if (swap) {+                byte_swap_vector(buff, itemsize / 4, 4);+            }+            ucs4 = buff;         }          /* truncation occurs here */-        PyObject *u = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND, buff, itemsize / 4);+        PyObject *u = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND, ucs4, itemsize / 4);         PyMem_RawFree(buff);         if (u == NULL) {

CLN: Remove unused context manager in groupby codePython · 7 + / 13 −

Reworks 17 lines of existing logic in pandas/core/groupby/groupby.py.

Changes how existing core implementation behaves. Read the linked PR for the surrounding test context.

pandas/core/groupby/groupby.py ↗ · 1 files

@@ -2875,19 +2875,13 @@ def sum_compat(obj: NDFrameT):                 # GH#18588: see min_compat below                 return obj.sum(skipna=skipna) -            # If we are grouping on categoricals we want unobserved categories to-            # return zero, rather than the default of NaN which the reindexing in-            # _agg_general() returns. GH #31422-            with com.temp_setattr(self, "observed", True):-                result = self._agg_general(-                    numeric_only=numeric_only,-                    min_count=min_count,-                    alias="sum",-                    npfunc=sum_compat,-                    skipna=skipna,-                )--            return result+            return self._agg_general(+                numeric_only=numeric_only,+                min_count=min_count,+                alias="sum",+                npfunc=sum_compat,+                skipna=skipna,+            )      @final     def prod(