diff --git a/lib/std/private/digitsutils.nim b/lib/std/private/digitsutils.nim
index 5daa0d09f9..73b28a68ba 100644
--- a/lib/std/private/digitsutils.nim
+++ b/lib/std/private/digitsutils.nim
@@ -31,7 +31,10 @@ const
 
 {.push checks: off, stackTrace: off.}
 
-proc utoa2Digits*(buf: var openArray[char]; pos: int; digits: uint32) {.inline.} =
+when not defined(nimHasEnforceNoRaises):
+  {.pragma: enforceNoRaises.}
+
+proc utoa2Digits*(buf: var openArray[char]; pos: int; digits: uint32) {.inline, enforceNoRaises.} =
   buf[pos] = digits100[2 * digits]
   buf[pos+1] = digits100[2 * digits + 1]
   #copyMem(buf, unsafeAddr(digits100[2 * digits]), 2 * sizeof((char)))
diff --git a/lib/system/stacktraces.nim b/lib/system/stacktraces.nim
index 42be9d94fb..7c8ab83c48 100644
--- a/lib/system/stacktraces.nim
+++ b/lib/system/stacktraces.nim
@@ -62,22 +62,23 @@ when defined(nimStackTraceOverride):
     let programCounters = stackTraceOverrideGetProgramCounters(maxStackTraceLines)
     if s.len == 0:
       s = newSeqOfCap[StackTraceEntry](programCounters.len)
-    for programCounter in programCounters:
-      s.add(StackTraceEntry(programCounter: cast[uint](programCounter)))
+    for i in 0..<programCounters.len:
+      s.add(StackTraceEntry(programCounter: cast[uint](programCounters[i])))
 
   # We may have more stack trace lines in the output, due to inlined procedures.
   proc addDebuggingInfo*(s: seq[StackTraceEntry]): seq[StackTraceEntry] =
     var programCounters: seq[cuintptr_t]
     # We process program counters in groups from complete stack traces, because
     # we have logic that keeps track of certain functions being inlined or not.
-    for entry in s:
+    for i in 0..<s.len:
+      let entry = addr s[i]
       if entry.procname.isNil and entry.programCounter != 0:
         programCounters.add(cast[cuintptr_t](entry.programCounter))
       elif entry.procname.isNil and (entry.line == reraisedFromBegin or entry.line == reraisedFromEnd):
         result.add(stackTraceOverrideGetDebuggingInfo(programCounters, maxStackTraceLines))
         programCounters = @[]
-        result.add(entry)
+        result.add(entry[])
       else:
-        result.add(entry)
+        result.add(entry[])
     if programCounters.len > 0:
       result.add(stackTraceOverrideGetDebuggingInfo(programCounters, maxStackTraceLines))
diff --git a/lib/system/strs_v2.nim b/lib/system/strs_v2.nim
index 9861c9ae4e..df5f481a8c 100644
--- a/lib/system/strs_v2.nim
+++ b/lib/system/strs_v2.nim
@@ -11,6 +11,8 @@
 
 {.push overflowChecks: off, rangeChecks: off.}
 
+{.push overflowChecks: off, rangeChecks: off.}
+
 template isLiteral(s): bool = (s.p == nil) or (s.p.cap and strlitFlag) == strlitFlag
 
 template contentSize(cap): int = cap + 1 + sizeof(NimStrPayloadBase)
diff --git a/tests/errmsgs/t23536.nim b/tests/errmsgs/t23536.nim
index 610a85babd..d8f1433331 100644
--- a/tests/errmsgs/t23536.nim
+++ b/tests/errmsgs/t23536.nim
@@ -6,8 +6,8 @@ const expected = """
 wrong trace:
 t23536.nim(22)           t23536
 t23536.nim(17)           foo
-assertions.nim(41)       failedAssertImpl
-assertions.nim(36)       raiseAssert
+assertions.nim(45)       failedAssertImpl
+assertions.nim(40)       raiseAssert
 fatal.nim(53)            sysFatal
 """
 
diff --git a/tests/errmsgs/t24974.nim b/tests/errmsgs/t24974.nim
index 4f7da11c96..39d473a89e 100644
--- a/tests/errmsgs/t24974.nim
+++ b/tests/errmsgs/t24974.nim
@@ -4,8 +4,8 @@ discard """
 t24974.nim(22)           t24974
 t24974.nim(19)           d
 t24974.nim(16)           s
-assertions.nim(41)       failedAssertImpl
-assertions.nim(36)       raiseAssert
+assertions.nim(45)       failedAssertImpl
+assertions.nim(40)       raiseAssert
 fatal.nim(53)            sysFatal
 Error: unhandled exception: t24974.nim(16, 26) `false`  [AssertionDefect]
 '''
@@ -19,4 +19,4 @@ proc d(): B =
   if s(k): discard
   quit 0
   k
-for _ in [0]: discard d()
\ No newline at end of file
+for _ in [0]: discard d()