Make sure stimes works right in corner cases.

src/Data/Text.hs

@@ -261,7 +261,8 @@ import Data.Word (Word8)
 import Foreign.C.Types
 import GHC.Base (eqInt, neInt, gtInt, geInt, ltInt, leInt)
 import qualified GHC.Exts as Exts
-import GHC.Int (Int8)
+import GHC.Int (Int8, Int (I#))
+import GHC.Num (Integer(IS, IP, IN))
 import GHC.Stack (HasCallStack)
 import qualified Language.Haskell.TH.Lib as TH
 import qualified Language.Haskell.TH.Syntax as TH
@@ -361,7 +362,14 @@ instance Read Text where
 -- | @since 1.2.2.0
 instance Semigroup Text where
     (<>) = append
-    stimes = replicate . P.fromIntegral
+
+    -- | Beware: this function will evaluate to error if the given number does
+    -- not fit into an @Int@.
+    stimes howManyTimes = case P.toInteger howManyTimes of
+      IS howManyTimesInt# -> replicate (I# howManyTimesInt#)
+      IP _ -> P.error "`Data.Text.stimes`: given number does not fit into an `Int`!"
+      IN _ -> P.const empty
+
     sconcat = concat . NonEmptyList.toList
 
 instance Monoid Text where