Compat annotations for #28878 (exception stacks).

Author: fredrikekre

base/error.jl

@@ -103,6 +103,9 @@ false.
 Explicitly passing `task` will return the current exception stack on an
 arbitrary task. This is useful for inspecting tasks which have failed due to
 uncaught exceptions.
+
+!!! compat "Julia 1.1"
+    This function requires at least Julia 1.1.
 """
 function catch_stack(task=current_task(); include_bt=true)
     raw = ccall(:jl_get_excstack, Any, (Any,Cint,Cint), task, include_bt, typemax(Cint))

doc/src/devdocs/ast.md

@@ -158,6 +158,9 @@ These symbols appear in the `head` field of `Expr`s in lowered form.
     Pop the stack of current exceptions back to the state at the associated `enter` when leaving a
     catch block. `args[1]` contains the token from the associated `enter`.
 
+    !!! compat "Julia 1.1"
+        `pop_exception` is new in Julia 1.1.
+
   * `inbounds`
 
     Controls turning bounds checks on or off. A stack is maintained; if the first argument of this

doc/src/manual/stacktraces.md

@@ -189,6 +189,9 @@ ERROR: Whoops!
 
 ## Exception stacks and [`catch_stack`](@ref)
 
+!!! compat "Julia 1.1"
+    Exception stacks requires at least Julia 1.1.
+
 While handling an exception further exceptions may be thrown. It can be useful to inspect all these exceptions to
 identify the root cause of a problem. The julia runtime supports this by pushing each exception onto an internal
 *exception stack* as it occurs. When the code exits a `catch` normally, any exceptions which were pushed onto the stack