diff --git a/compiler/closureiters.nim b/compiler/closureiters.nim
index ddf9c2704c..52f0bed2bb 100644
--- a/compiler/closureiters.nim
+++ b/compiler/closureiters.nim
@@ -727,7 +727,7 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
       n[0] = ex
       result.add(n)
 
-  of nkCast, nkHiddenStdConv, nkHiddenSubConv, nkConv, nkObjDownConv,
+  of nkCast, nkHiddenStdConv, nkHiddenSubConv, nkConv, nkObjDownConv, nkObjUpConv,
       nkDerefExpr, nkHiddenDeref:
     var ns = false
     for i in ord(n.kind == nkCast)..<n.len:
diff --git a/compiler/semcall.nim b/compiler/semcall.nim
index 4557ab4c69..29d19875d4 100644
--- a/compiler/semcall.nim
+++ b/compiler/semcall.nim
@@ -981,7 +981,7 @@ proc setGenericParams(c: PContext, n, expectedParams: PNode) =
     if e.typ == nil:
       n[i].typ = errorType(c)
     else:
-      n[i].typ = e.typ.skipTypes({tyTypeDesc})
+      n[i].typ = e.typ
 
 proc explicitGenericInstantiation(c: PContext, n: PNode, s: PSym, doError: bool): PNode =
   assert n.kind == nkBracketExpr
diff --git a/compiler/sigmatch.nim b/compiler/sigmatch.nim
index d97148baef..2e46d508ae 100644
--- a/compiler/sigmatch.nim
+++ b/compiler/sigmatch.nim
@@ -160,8 +160,7 @@ proc matchGenericParam(m: var TCandidate, formal: PType, n: PNode) =
       arg = newTypeS(tyStatic, m.c, son = evaluated.typ)
       arg.n = evaluated
   elif formalBase.kind == tyTypeDesc:
-    if arg.kind != tyTypeDesc:
-      arg = makeTypeDesc(m.c, arg)
+    discard # if arg is not tyTypeDesc, typeRel will report the mismatch
   else:
     arg = arg.skipTypes({tyTypeDesc})
   let tm = typeRel(m, formal, arg)
@@ -2186,9 +2185,9 @@ proc implicitConv(kind: TNodeKind, f: PType, arg: PNode, m: TCandidate,
       result.typ = errorType(c)
   else:
     result.typ = f.skipTypes({tySink})
-  # keep varness
+  # keep varness, but don't wrap lent types with var
   if arg.typ != nil and arg.typ.kind == tyVar:
-    result.typ = toVar(result.typ, tyVar, c.idgen)
+    result.typ = toVar(result.typ.skipTypes({tyLent}), tyVar, c.idgen)
     # copy the tfVarIsPtr flag
     result.typ.flags = arg.typ.flags
   else:
diff --git a/doc/manual_experimental.md b/doc/manual_experimental.md
index 81defd70b5..672ab4a99c 100644
--- a/doc/manual_experimental.md
+++ b/doc/manual_experimental.md
@@ -2127,7 +2127,7 @@ can be used in an `isolate` context:
     `=destroy`(dest.value)
   ```
 
-The `.sendable` pragma itself is an experimenal, unchecked, unsafe annotation. It is
+The `.sendable` pragma itself is an experimental, unchecked, unsafe annotation. It is
 currently only used by `Isolated[T]`.
 
 Virtual pragma
diff --git a/doc/markdown_rst.md b/doc/markdown_rst.md
index c7977f75a7..f8d0012e55 100644
--- a/doc/markdown_rst.md
+++ b/doc/markdown_rst.md
@@ -276,9 +276,9 @@ This parser has 2 modes for inline markup:
 
 2) Compatibility mode which is RST rules.
 
-.. Note:: in both modes the parser interpretes text between single
+.. Note:: in both modes the parser interprets text between single
      backticks (code) identically:
-     backslash does not escape; the only exception: ``\`` folowed by `
+     backslash does not escape; the only exception: ``\`` followed by `
      does escape so that we can always input a single backtick ` in
      inline code. However that makes impossible to input code with
      ``\`` at the end in *single* backticks, one must use *double*
diff --git a/doc/nimgrep_cmdline.txt b/doc/nimgrep_cmdline.txt
index 6f6887bc4e..7088af267e 100644
--- a/doc/nimgrep_cmdline.txt
+++ b/doc/nimgrep_cmdline.txt
@@ -52,7 +52,7 @@ Options:
                           nimgrep --filenames               # In current dir
                           nimgrep --filenames "" DIRECTORY
                            # Note empty pattern "", lists all files in DIRECTORY
-* Interprete patterns:
+* Interpret patterns:
   --peg               PATTERN and PAT are Peg
   --re                PATTERN and PAT are regular expressions (default)
   --rex, -x           use the "extended" syntax for the regular expression
diff --git a/doc/packaging.md b/doc/packaging.md
index b742bef282..7ee4aaf102 100644
--- a/doc/packaging.md
+++ b/doc/packaging.md
@@ -27,7 +27,7 @@ Nim runs on a wide variety of platforms. Support on amd64 and i386 is tested reg
 - ppc64el (aka ppc64le)
 - riscv64
 
-The following platforms are seldomly tested:
+The following platforms are rarely tested:
 
 - alpha
 - hppa
diff --git a/doc/pegdocs.txt b/doc/pegdocs.txt
index 0a8fd81878..8b2814ee20 100644
--- a/doc/pegdocs.txt
+++ b/doc/pegdocs.txt
@@ -20,8 +20,8 @@ notation           meaning
                    as they succeed. Indicate success if all succeeded.
                    Otherwise, do not consume any text and indicate failure.
                    The sequence's precedence is higher than that of ordered
-                   choice: ``A B / C`` means ``(A B) / Z`` and
-                   not ``A (B / Z)``.
+                   choice: ``A B / C`` means ``(A B) / C`` and
+                   not ``A (B / C)``.
 ``(E)``            Grouping: Parenthesis can be used to change
                    operator priority.
 ``{E}``            Capture: Apply expression `E` and store the substring
diff --git a/lib/impure/nre/private/util.nim b/lib/impure/nre/private/util.nim
index ed84207766..e252af80d8 100644
--- a/lib/impure/nre/private/util.nim
+++ b/lib/impure/nre/private/util.nim
@@ -15,6 +15,9 @@ template formatStr*(howExpr, namegetter, idgetter): untyped =
       val.add(how[i])
       i += 1
     else:
+      if i + 1 >= how.len:
+        raise newException(ValueError, "Syntax error in format string at " & $i)
+
       if how[i + 1] == '$':
         val.add('$')
         i += 2
@@ -27,7 +30,7 @@ template formatStr*(howExpr, namegetter, idgetter): untyped =
         i += 1
         var id {.inject.} = 0
         while i < how.len and how[i] in {'0'..'9'}:
-          id += (id * 10) + (ord(how[i]) - ord('0'))
+          id = (id * 10) + (ord(how[i]) - ord('0'))
           i += 1
         val.add(idgetter)
         lastNum = id + 1
@@ -44,6 +47,8 @@ template formatStr*(howExpr, namegetter, idgetter): untyped =
         while i < how.len and how[i] != '}':
           name.add(how[i])
           i += 1
+        if i >= how.len or how[i] != '}':
+          raise newException(ValueError, "Syntax error in format string at " & $i)
         i += 1
         val.add(namegetter)
       else:
diff --git a/lib/pure/asyncdispatch.nim b/lib/pure/asyncdispatch.nim
index 004cc9bcfe..70d94b023e 100644
--- a/lib/pure/asyncdispatch.nim
+++ b/lib/pure/asyncdispatch.nim
@@ -1946,9 +1946,14 @@ proc withTimeout*[T](fut: Future[T], timeout: int): owned(Future[bool]) =
           retFuture.fail(fut.error)
         else:
           retFuture.complete(true)
+        # Timeout side lost; drop its callback to avoid retaining closures/futures.
+        timeoutFuture.clearCallbacks()
   timeoutFuture.callback =
     proc () =
-      if not retFuture.finished: retFuture.complete(false)
+      if not retFuture.finished:
+        retFuture.complete(false)
+        # Wrapped future side lost; drop its callback to avoid retaining closures/futures.
+        fut.clearCallbacks()
   return retFuture
 
 proc accept*(socket: AsyncFD,
diff --git a/lib/pure/streams.nim b/lib/pure/streams.nim
index 5eb16a8c17..7d422ff4fe 100644
--- a/lib/pure/streams.nim
+++ b/lib/pure/streams.nim
@@ -16,9 +16,9 @@
 ## stream interface.
 ##
 ## .. warning:: Due to the use of `pointer`, the `readData`, `peekData` and
-## `writeData` interfaces are not available on the compile-time VM, and must
-## be cast from a `ptr string` on the JS backend. However, `readDataStr` is
-## available generally in place of `readData`.
+##   `writeData` interfaces are not available on the compile-time VM, and must
+##   be cast from a `ptr string` on the JS backend. However, `readDataStr` is
+##   available generally in place of `readData`.
 ##
 ## Basic usage
 ## ===========
diff --git a/lib/std/sysatomics.nim b/lib/std/sysatomics.nim
index cc6000c206..ac5acf76e6 100644
--- a/lib/std/sysatomics.nim
+++ b/lib/std/sysatomics.nim
@@ -219,16 +219,16 @@ elif someVcc:
     elif mem == ATOMIC_ACQ_REL: fence()
     elif mem == ATOMIC_SEQ_CST: fence()
 
-  proc atomicStoreN*[T: AtomType](p: ptr T, val: T, mem: static[AtomMemModel]) =
+  proc atomicStoreN*[T: AtomType](p: ptr T, val: T, mem: static[AtomMemModel]) {.enforcenoraises.} =
     barrier(mem)
     p[] = val
 
-  proc atomicLoadN*[T: AtomType](p: ptr T, mem: static[AtomMemModel]): T =
+  proc atomicLoadN*[T: AtomType](p: ptr T, mem: static[AtomMemModel]): T {.enforcenoraises.} =
     result = p[]
     barrier(mem)
 
   proc atomicCompareExchangeN*[T: ptr](p, expected: ptr T, desired: T,
-    weak: bool, success_memmodel: AtomMemModel, failure_memmodel: AtomMemModel): bool =
+    weak: bool, success_memmodel: AtomMemModel, failure_memmodel: AtomMemModel): bool {.enforcenoraises.} =
     when sizeof(T) == 8:
       interlockedCompareExchange64(p, cast[int64](desired), cast[int64](expected[])) ==
         cast[int64](expected[])
@@ -236,7 +236,7 @@ elif someVcc:
       interlockedCompareExchange32(p, cast[int32](desired), cast[int32](expected[])) ==
         cast[int32](expected[])
 
-  proc atomicExchangeN*[T: ptr](p: ptr T, val: T, mem: AtomMemModel): T =
+  proc atomicExchangeN*[T: ptr](p: ptr T, val: T, mem: AtomMemModel): T {.enforcenoraises.} =
     when sizeof(T) == 8:
       cast[T](interlockedExchange64(p, cast[int64](val)))
     elif sizeof(T) == 4:
diff --git a/tests/generics/tpointerprocs.nim b/tests/generics/tpointerprocs.nim
index 29c4f2954f..ba99044645 100644
--- a/tests/generics/tpointerprocs.nim
+++ b/tests/generics/tpointerprocs.nim
@@ -3,7 +3,7 @@ cmd: "nim check $options --hints:off $file"
 action: "reject"
 nimout:'''
 tpointerprocs.nim(22, 11) Error: 'foo' doesn't have a concrete type, due to unspecified generic parameters.
-tpointerprocs.nim(34, 14) Error: type mismatch: got <int>
+tpointerprocs.nim(34, 14) Error: type mismatch: got <typedesc[int]>
 but expected one of:
 proc foo(x: int | float; y: int or string): float
   first type mismatch at position: 2 in generic parameters
diff --git a/tests/iter/tclosureiter_objupconv_methodawait.nim b/tests/iter/tclosureiter_objupconv_methodawait.nim
new file mode 100644
index 0000000000..671f70f923
--- /dev/null
+++ b/tests/iter/tclosureiter_objupconv_methodawait.nim
@@ -0,0 +1,12 @@
+discard """
+  cmd: "nim c $file"
+"""
+
+import std/asyncdispatch
+
+type
+  A {.inheritable.} = ref object
+  B = ref object of A
+
+method a(x: A): Future[A] {.async, base.} =
+  B(await a(B()))
diff --git a/tests/stdlib/nre/replace.nim b/tests/stdlib/nre/replace.nim
index 5cf659f213..290892bc4e 100644
--- a/tests/stdlib/nre/replace.nim
+++ b/tests/stdlib/nre/replace.nim
@@ -14,9 +14,15 @@ block: # replace
     check("123".replace(re"(\d)(\d)", "$#$#") == "123")
     check("123".replace(re"(?<foo>\d)(\d)", "$foo$#$#") == "1123")
     check("123".replace(re"(?<foo>\d)(\d)", "${foo}$#$#") == "1123")
+    check("abcdefghijklm".replace(re"(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)(m)", "$12") == "l")
 
   block: # replacing missing captures should throw instead of segfaulting
     expect IndexDefect: discard "ab".replace(re"(a)|(b)", "$1$2")
     expect IndexDefect: discard "b".replace(re"(a)?(b)", "$1$2")
     expect KeyError: discard "b".replace(re"(a)?", "${foo}")
     expect KeyError: discard "b".replace(re"(?<foo>a)?", "${foo}")
+
+  block: # malformed replacement syntax should throw instead of OOB crash
+    expect ValueError: discard "a".replace(re"a", "$")
+    expect ValueError: discard "a".replace(re"a", "x$")
+    expect ValueError: discard "a".replace(re"a", "${foo")
diff --git a/tests/typerel/t25262.nim b/tests/typerel/t25262.nim
new file mode 100644
index 0000000000..182561dde3
--- /dev/null
+++ b/tests/typerel/t25262.nim
@@ -0,0 +1,13 @@
+discard """
+   errormsg: "type mismatch"
+   output: '''
+t25262.nim(13, 5) Error: type mismatch: got <>
+but expected one of:
+proc v[T: typedesc]()
+
+expression: v[0]()
+'''
+"""
+
+proc v[T: typedesc]() = discard
+v[0]()
\ No newline at end of file
diff --git a/tests/types/tlent_var.nim b/tests/types/tlent_var.nim
index 73b5bef9b4..715567d2d1 100644
--- a/tests/types/tlent_var.nim
+++ b/tests/types/tlent_var.nim
@@ -23,3 +23,18 @@ proc varProc(x: var int) =
 doAssert: not compiles(test_lent(x) = 1)
 doAssert: not compiles(varProc(test_lent(x)))
 
+type X = tuple[a: int, b: int]
+
+type ArrayBuf*[N: static int, T] = object
+  buf*: array[N, T]
+
+var v: ArrayBuf[32, X]
+
+
+# proc `[]`*[N, T](b: var ArrayBuf[N, T], i: BackwardsIndex): lent T = # works
+#   b.buf[i]
+
+template `[]`*[N, T](b: var ArrayBuf[N, T], i: BackwardsIndex): lent T =
+  b.buf[i]
+
+doAssert $v[^4] == "(a: 0, b: 0)"