Add test suite for debugger

1 files changed, 796 insertions, 0 deletions

diff --git a/lib/debugger/test/trycatch_SUITE.erl b/lib/debugger/test/trycatch_SUITE.erl
new file mode 100644
index 0000000000..5901cdc9e5
--- /dev/null
+++ b/lib/debugger/test/trycatch_SUITE.erl
@@ -0,0 +1,796 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2003-2010. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%%
+-module(trycatch_SUITE).
+
+-export([all/1,init_per_testcase/2,fin_per_testcase/2,init_all/1,finish_all/1,
+	 basic/1,lean_throw/1,try_of/1,try_after/1,%after_bind/1,
+	 catch_oops/1,after_oops/1,eclectic/1,rethrow/1,
+	 nested_of/1,nested_catch/1,nested_after/1]).
+
+-include("test_server.hrl").
+
+all(suite) ->
+    [{conf,init_all,cases(),finish_all}].
+
+cases() ->
+    [basic,lean_throw,try_of,try_after,%after_bind,
+     catch_oops,after_oops,eclectic,rethrow,
+     nested_of,nested_catch,nested_after].
+
+init_per_testcase(_Case, Config) ->
+    test_lib:interpret(?MODULE),
+    Dog = test_server:timetrap(?t:minutes(1)),
+    [{watchdog,Dog}|Config].
+
+fin_per_testcase(_Case, Config) ->
+    Dog = ?config(watchdog, Config),
+    ?t:timetrap_cancel(Dog),
+    ok.
+
+init_all(Config) when is_list(Config) ->
+    ?line test_lib:interpret(?MODULE),
+    ?line true = lists:member(?MODULE, int:interpreted()),
+    ok.
+
+finish_all(Config) when is_list(Config) ->
+    ok.
+
+basic(Conf) when is_list(Conf) ->
+    ?line 2 =
+	try my_div(4, 2)
+	catch
+            Class:Reason -> {Class,Reason}
+	end,
+    ?line error =
+        try my_div(1, 0)
+        catch
+            error:badarith -> error
+        end,
+    ?line error =
+        try 1/0
+        catch
+            error:badarith -> error
+        end,
+    ?line ok =
+        try my_add(53, atom)
+        catch
+            error:badarith -> ok
+        end,
+    ?line exit_nisse =
+        try exit(nisse)
+	catch
+            exit:nisse -> exit_nisse
+        end,
+    ?line ok =
+        try throw(kalle)
+        catch
+            kalle -> ok
+        end,
+
+    %% Try some stuff where the compiler will optimize away the try.
+
+    V = id({a,variable}),
+    ?line V = try V catch nisse -> error end,
+    ?line 42 = try 42 catch nisse -> error end,
+    ?line [V] = try [V] catch nisse -> error end,
+    ?line {ok,V} = try {ok,V} catch nisse -> error end,
+
+    %% Same idea, but use an after too.
+
+    ?line V = try V catch nisse -> error after after_call() end,
+    ?line after_clean(),
+    ?line 42 = try 42 after after_call() end,
+    ?line after_clean(),
+    ?line [V] = try [V] catch nisse -> error after after_call() end,
+    ?line after_clean(),
+    ?line {ok,V} = try {ok,V} after after_call() end,
+
+    %% Try/of
+    ?line ok = try V of
+              {a,variable} -> ok
+              catch nisse -> erro
+          end,
+
+    ok.
+
+after_call() ->
+    put(basic, after_was_called).
+
+after_clean() ->
+    after_was_called = erase(basic).
+
+lean_throw(Conf) when is_list(Conf) ->
+    ?line {throw,kalle} =
+        try throw(kalle)
+        catch
+            Kalle -> {throw,Kalle}
+        end,
+    ?line {exit,kalle} =
+        try exit(kalle)
+        catch
+            Throw1 -> {throw,Throw1};
+	    exit:Reason1 -> {exit,Reason1}
+        end,
+    ?line {exit,kalle} =
+        try exit(kalle)
+        catch
+	    exit:Reason2 -> {exit,Reason2};
+            Throw2 -> {throw,Throw2}
+        end,
+    ?line {exit,kalle} =
+        try try exit(kalle)
+            catch
+                Throw3 -> {throw,Throw3}
+            end
+        catch
+            exit:Reason3 -> {exit,Reason3}
+        end,
+    ok.
+
+try_of(Conf) when is_list(Conf) ->
+    ?line {ok,{some,content}} =
+	try_of_1({value,{good,{some,content}}}),
+    ?line {error,[other,content]} =
+	try_of_1({value,{bad,[other,content]}}),
+    ?line {caught,{exit,{ex,it,[reason]}}} =
+	try_of_1({exit,{ex,it,[reason]}}),
+    ?line {caught,{throw,[term,{in,a,{tuple}}]}} =
+	try_of_1({throw,[term,{in,a,{tuple}}]}),
+    ?line {caught,{error,[bad,arg]}} =
+	try_of_1({error,[bad,arg]}),
+    ?line {caught,{error,badarith}} =
+	try_of_1({'div',{1,0}}),
+    ?line {caught,{error,badarith}} =
+	try_of_1({'add',{a,0}}),
+    ?line {caught,{error,badarg}} =
+	try_of_1({'abs',x}),
+    ?line {caught,{error,function_clause}} =
+	try_of_1(illegal),
+    ?line {error,{try_clause,{some,other_garbage}}} =
+	try try_of_1({value,{some,other_garbage}})
+        catch error:Reason -> {error,Reason}
+        end,
+    ok.
+
+try_of_1(X) ->
+    try foo(X) of
+        {good,Y} -> {ok,Y};
+	{bad,Y} -> {error,Y}
+    catch
+	Class:Reason ->
+             {caught,{Class,Reason}}
+    end.
+
+try_after(Conf) when is_list(Conf) ->
+    ?line {{ok,[some,value],undefined},finalized} =
+	try_after_1({value,{ok,[some,value]}},finalized),
+    ?line {{error,badarith,undefined},finalized} =
+	try_after_1({'div',{1,0}},finalized),
+    ?line {{error,badarith,undefined},finalized} =
+	try_after_1({'add',{1,a}},finalized),
+    ?line {{error,badarg,undefined},finalized} =
+	try_after_1({'abs',a},finalized),
+    ?line {{error,[the,{reason}],undefined},finalized} =
+	try_after_1({error,[the,{reason}]},finalized),
+    ?line {{throw,{thrown,[reason]},undefined},finalized} =
+	try_after_1({throw,{thrown,[reason]}},finalized),
+    ?line {{exit,{exited,{reason}},undefined},finalized} =
+	try_after_1({exit,{exited,{reason}}},finalized),
+    ?line {{error,function_clause,undefined},finalized} =
+	try_after_1(function_clause,finalized),
+    ?line ok =
+	try try_after_1({'add',{1,1}}, finalized)
+        catch
+            error:{try_clause,2} -> ok
+	end,
+    ?line finalized = erase(try_after),
+    ?line ok =
+        try try foo({exit,[reaso,{n}]})
+            after put(try_after, finalized)
+            end
+        catch
+            exit:[reaso,{n}] -> ok
+        end,
+    ok.
+
+try_after_1(X, Y) ->
+    erase(try_after),
+    Try =
+        try foo(X) of
+	    {ok,Value} -> {ok,Value,get(try_after)}
+        catch
+	    Reason -> {throw,Reason,get(try_after)};
+	    error:Reason -> {error,Reason,get(try_after)};
+	    exit:Reason ->  {exit,Reason,get(try_after)}
+        after
+	    put(try_after, Y)
+        end,
+    {Try,erase(try_after)}.
+
+-ifdef(begone).
+
+after_bind(Conf) when is_list(Conf) ->
+    V = [make_ref(),self()|value],
+    ?line {value,{value,V}} =
+	after_bind_1({value,V}, V, {value,V}),
+    ok.
+
+after_bind_1(X, V, Y) ->
+    try
+        Try =
+            try foo(X) of
+                V -> value
+            catch
+                C1:V -> {caught,C1}
+            after
+                After = foo(Y)
+	    end,
+        {Try,After}
+    of
+        V -> {value,V}
+    catch
+        C:D -> {caught,{C,D}}
+    end.
+
+-endif.
+
+catch_oops(Conf) when is_list(Conf) ->
+    V = {v,[a,l|u],{e},self()},
+    ?line {value,V} = catch_oops_1({value,V}),
+    ?line {value,1} = catch_oops_1({'div',{1,1}}),
+    ?line {error,badarith} = catch_oops_1({'div',{1,0}}),
+    ?line {error,function_clause} = catch_oops_1(function_clause),
+    ?line {throw,V} = catch_oops_1({throw,V}),
+    ?line {exit,V} = catch_oops_1({exit,V}),
+    ok.
+
+catch_oops_1(X) ->
+    Ref = make_ref(),
+    try try foo({error,Ref})
+        catch
+            error:Ref ->
+	        foo(X)
+        end of
+        Value -> {value,Value}
+    catch
+        Class:Data -> {Class,Data}
+    end.
+
+
+
+after_oops(Conf) when is_list(Conf) ->
+    V = {self(),make_ref()},
+    ?line {{value,V},V} = after_oops_1({value,V}, {value,V}),
+    ?line {{exit,V},V} = after_oops_1({exit,V}, {value,V}),
+    ?line {{error,V},undefined} = after_oops_1({value,V}, {error,V}),
+    ?line {{error,function_clause},undefined} =
+	after_oops_1({exit,V}, function_clause),
+    ok.
+
+after_oops_1(X, Y) ->
+    erase(after_oops),
+    Try =
+        try try foo(X)
+            after
+                put(after_oops, foo(Y))
+            end of
+            V -> {value,V}
+        catch
+            C:D -> {C,D}
+        end,
+    {Try,erase(after_oops)}.
+
+
+
+eclectic(Conf) when is_list(Conf) ->
+    V = {make_ref(),3.1415926535,[[]|{}]},
+    ?line {{value,{value,V},V},V} =
+	eclectic_1({foo,{value,{value,V}}}, undefined, {value,V}),
+    ?line {{'EXIT',{V,[{?MODULE,foo,_}|_]}},V} =
+	eclectic_1({catch_foo,{error,V}}, undefined, {value,V}),
+    ?line {{error,{exit,V},{'EXIT',V}},V} =
+	eclectic_1({foo,{error,{exit,V}}}, error, {value,V}),
+    ?line {{value,{value,V},V},{'EXIT',{badarith,[{?MODULE,my_add,_}|_]}}} =
+	eclectic_1({foo,{value,{value,V}}}, undefined, {'add',{0,a}}),
+    ?line {{'EXIT',V},V} =
+	eclectic_1({catch_foo,{exit,V}}, undefined, {throw,V}),
+    ?line {{error,{'div',{1,0}},{'EXIT',{badarith,[{?MODULE,my_div,_}|_]}}}, {'EXIT',V}} =
+	eclectic_1({foo,{error,{'div',{1,0}}}}, error, {exit,V}),
+    ?line {{{error,V},{'EXIT',{V,[{?MODULE,foo,_}|_]}}},{'EXIT',V}} =
+	eclectic_1({catch_foo,{throw,{error,V}}}, undefined, {exit,V}),
+    %%
+    ?line {{value,{value,{value,V},V}},V} =
+	eclectic_2({value,{value,V}}, undefined, {value,V}),
+    ?line {{value,{throw,{value,V},V}},V} =
+	eclectic_2({throw,{value,V}}, throw, {value,V}),
+    ?line {{caught,{'EXIT',V}},undefined} =
+	eclectic_2({value,{value,V}}, undefined, {exit,V}),
+    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,_}|_]}}},undefined} =
+	eclectic_2({error,{value,V}}, throw, {error,V}),
+    ?line {{caught,{'EXIT',{badarg,[{erlang,abs,[V]}|_]}}},V} =
+	eclectic_2({value,{'abs',V}}, undefined, {value,V}),
+    ?line {{caught,{'EXIT',{badarith,[{?MODULE,my_add,_}|_]}}},V} =
+	eclectic_2({exit,{'add',{0,a}}}, exit, {value,V}),
+    ?line {{caught,{'EXIT',V}},undefined} =
+	eclectic_2({value,{error,V}}, undefined, {exit,V}),
+    ?line {{caught,{'EXIT',{V,[{?MODULE,foo,_}|_]}}},undefined} =
+	eclectic_2({throw,{'div',{1,0}}}, throw, {error,V}),
+    ok.
+
+eclectic_1(X, C, Y) ->
+    erase(eclectic),
+    Done = make_ref(),
+    Try =
+        try case X of
+		{catch_foo,V} -> catch {Done,foo(V)};
+		{foo,V} -> {Done,foo(V)}
+	    end of
+            {Done,D} -> {value,D,catch foo(D)};
+	    {'EXIT',_}=Exit -> Exit;
+	    D -> {D,catch foo(D)}
+        catch
+            C:D -> {C,D,catch foo(D)}
+        after
+            put(eclectic, catch foo(Y))
+        end,
+    {Try,erase(eclectic)}.
+
+eclectic_2(X, C, Y) ->
+    Done = make_ref(),
+    erase(eclectic),
+    Catch =
+	case
+            catch
+            {Done,
+             try foo(X) of
+                 V -> {value,V,foo(V)}
+             catch
+                 C:D -> {C,D,foo(D)}
+             after
+                 put(eclectic, foo(Y))
+             end} of
+            {Done,Z} -> {value,Z};
+            Z -> {caught,Z}
+        end,
+    {Catch,erase(eclectic)}.
+
+rethrow(Conf) when is_list(Conf) ->
+    V = {a,[b,{c,self()},make_ref]},
+    ?line {value2,value1} =
+	rethrow_1({value,V}, V),
+    ?line {caught2,{error,V}} =
+	rethrow_2({error,V}, undefined),
+    ?line {caught2,{exit,V}} =
+	rethrow_1({exit,V}, error),
+    ?line {caught2,{throw,V}} =
+	rethrow_1({throw,V}, undefined),
+    ?line {caught2,{throw,V}} =
+	rethrow_2({throw,V}, undefined),
+    ?line {caught2,{error,badarith}} =
+	rethrow_1({'add',{0,a}}, throw),
+    ?line {caught2,{error,function_clause}} =
+	rethrow_2(function_clause, undefined),
+    ?line {caught2,{error,{try_clause,V}}} =
+	rethrow_1({value,V}, exit),
+    ?line {value2,{caught1,V}} =
+	rethrow_1({error,V}, error),
+    ?line {value2,{caught1,V}} =
+	rethrow_1({exit,V}, exit),
+    ?line {value2,caught1} =
+	rethrow_2({throw,V}, V),
+    ok.
+
+rethrow_1(X, C1) ->
+    try try foo(X) of
+            C1 -> value1
+        catch
+            C1:D1 -> {caught1,D1}
+        end of
+        V2 -> {value2,V2}
+    catch
+        C2:D2 -> {caught2,{C2,D2}}
+    end.
+
+rethrow_2(X, C1) ->
+    try try foo(X) of
+            C1 -> value1
+        catch
+            C1 -> caught1 % Implicit class throw:
+        end of
+        V2 -> {value2,V2}
+    catch
+        C2:D2 -> {caught2,{C2,D2}}
+    end.
+
+
+
+nested_of(Conf) when is_list(Conf) ->
+    V = {[self()|make_ref()],1.4142136},
+    ?line {{value,{value1,{V,x2}}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{value,{V,x1}},void,{V,x1}},
+		    {value,{V,x2}}, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{throw,{V,x2}}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{value,{V,x1}},void,{V,x1}},
+		    {throw,{V,x2}}, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarith}},
+	   undefined,
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{value,{V,x1}},void,{V,x1}},
+		    {throw,{V,x2}}, {'div',{1,0}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarith}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_of_1({{value,{V,x1}},void,{V,x1}},
+		    {throw,{V,x2}}, {'div',{1,0}}, {'add',{0,b}}),
+    %%
+    ?line {{caught,{error,{try_clause,{V,x1}}}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{value,{V,x1}},void,try_clause},
+		    void, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{exit,{V,x3}}},
+	   undefined,
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{value,{V,x1}},void,try_clause},
+		    void, {exit,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{throw,{V,x4}}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_of_1({{value,{V,x1}},void,try_clause},
+		    void, {exit,{V,x3}}, {throw,{V,x4}}),
+    %%
+    ?line {{value,{caught1,{V,x2}}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{error,{V,x1}},error,{V,x1}},
+		    {value,{V,x2}}, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarith}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{error,{V,x1}},error,{V,x1}},
+		    {'add',{1,c}}, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarith}},
+	   undefined,
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{error,{V,x1}},error,{V,x1}},
+		    {'add',{1,c}}, {'div',{17,0}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarg}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_of_1({{error,{V,x1}},error,{V,x1}},
+		    {'add',{1,c}}, {'div',{17,0}}, {'abs',V}),
+    %%
+    ?line {{caught,{error,badarith}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{'add',{2,c}},rethrow,void},
+		    void, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarg}},
+	   undefined,
+	   {V,x4},
+	   finalized} =
+	nested_of_1({{'add',{2,c}},rethrow,void},
+		    void, {'abs',V}, {value,{V,x4}}),
+    ?line {{caught,{error,function_clause}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_of_1({{'add',{2,c}},rethrow,void},
+		    void, {'abs',V}, function_clause),
+    ok.
+
+nested_of_1({X1,C1,V1},
+	    X2, X3, X4) ->
+    erase(nested3),
+    erase(nested4),
+    erase(nested),
+    Self = self(),
+    Try =
+	try
+            try self()
+            of
+                Self ->
+                    try
+                        foo(X1)
+	            of
+	                V1 -> {value1,foo(X2)}
+                    catch
+                        C1:V1 -> {caught1,foo(X2)}
+	            after
+                        put(nested3, foo(X3))
+                    end
+            after
+                put(nested4, foo(X4))
+            end
+        of
+            V -> {value,V}
+        catch
+            C:D -> {caught,{C,D}}
+        after
+            put(nested, finalized)
+	end,
+    {Try,erase(nested3),erase(nested4),erase(nested)}.
+
+
+
+nested_catch(Conf) when is_list(Conf) ->
+    V = {[make_ref(),1.4142136,self()]},
+    ?line {{value,{value1,{V,x2}}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{value,{V,x1}},void,{V,x1}},
+		    {value,{V,x2}}, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{throw,{V,x2}}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{value,{V,x1}},void,{V,x1}},
+		    {throw,{V,x2}}, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarith}},
+	   undefined,
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{value,{V,x1}},void,{V,x1}},
+		    {throw,{V,x2}}, {'div',{1,0}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarith}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_catch_1({{value,{V,x1}},void,{V,x1}},
+		    {throw,{V,x2}}, {'div',{1,0}}, {'add',{0,b}}),
+    %%
+    ?line {{caught,{error,{try_clause,{V,x1}}}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{value,{V,x1}},void,try_clause},
+		    void, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{exit,{V,x3}}},
+	   undefined,
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{value,{V,x1}},void,try_clause},
+		    void, {exit,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{throw,{V,x4}}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_catch_1({{value,{V,x1}},void,try_clause},
+		    void, {exit,{V,x3}}, {throw,{V,x4}}),
+    %%
+    ?line {{value,{caught1,{V,x2}}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{error,{V,x1}},error,{V,x1}},
+		    {value,{V,x2}}, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarith}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{error,{V,x1}},error,{V,x1}},
+		    {'add',{1,c}}, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarith}},
+	   undefined,
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{error,{V,x1}},error,{V,x1}},
+		    {'add',{1,c}}, {'div',{17,0}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarg}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_catch_1({{error,{V,x1}},error,{V,x1}},
+		    {'add',{1,c}}, {'div',{17,0}}, {'abs',V}),
+    %%
+    ?line {{caught,{error,badarith}},
+	   {V,x3},
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{'add',{2,c}},rethrow,void},
+		    void, {value,{V,x3}}, {value,{V,x4}}),
+    ?line {{caught,{error,badarg}},
+	   undefined,
+	   {V,x4},
+	   finalized} =
+	nested_catch_1({{'add',{2,c}},rethrow,void},
+		    void, {'abs',V}, {value,{V,x4}}),
+    ?line {{caught,{error,function_clause}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_catch_1({{'add',{2,c}},rethrow,void},
+		    void, {'abs',V}, function_clause),
+    ok.
+
+nested_catch_1({X1,C1,V1},
+	    X2, X3, X4) ->
+    erase(nested3),
+    erase(nested4),
+    erase(nested),
+    Throw = make_ref(),
+    Try =
+	try
+            try throw(Throw)
+            catch
+		Throw ->
+                    try
+                        foo(X1)
+	            of
+	                V1 -> {value1,foo(X2)}
+                    catch
+                        C1:V1 -> {caught1,foo(X2)}
+	            after
+                        put(nested3, foo(X3))
+                    end
+            after
+                put(nested4, foo(X4))
+            end
+        of
+            V -> {value,V}
+        catch
+            C:D -> {caught,{C,D}}
+        after
+            put(nested, finalized)
+	end,
+    {Try,erase(nested3),erase(nested4),erase(nested)}.
+
+nested_after(Conf) when is_list(Conf) ->
+    V = [{make_ref(),1.4142136,self()}],
+    ?line {value,
+	   {V,x3},
+	   {value1,{V,x2}},
+	   finalized} =
+	nested_after_1({{value,{V,x1}},void,{V,x1}},
+		       {value,{V,x2}}, {value,{V,x3}}),
+    ?line {{caught,{error,{V,x2}}},
+	   {V,x3},
+	   undefined,
+	   finalized} =
+	nested_after_1({{value,{V,x1}},void,{V,x1}},
+		       {error,{V,x2}}, {value,{V,x3}}),
+    ?line {{caught,{exit,{V,x3}}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_after_1({{value,{V,x1}},void,{V,x1}},
+		       {error,{V,x2}}, {exit,{V,x3}}),
+    %%
+    ?line {{caught,{error,{try_clause,{V,x1}}}},
+	   {V,x3},
+	   undefined,
+	   finalized} =
+	nested_after_1({{value,{V,x1}},void,try_clause},
+		       void, {value,{V,x3}}),
+    ?line {{caught,{error,badarith}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_after_1({{value,{V,x1}},void,try_clause},
+		       void, {'div',{17,0}}),
+    %%
+    ?line {value,
+	   {V,x3},
+	   {caught1,{V,x2}},
+	   finalized} =
+	nested_after_1({{throw,{V,x1}},throw,{V,x1}},
+		       {value,{V,x2}}, {value,{V,x3}}),
+    ?line {{caught,{error,badarith}},
+	   {V,x3},
+	   undefined,
+	   finalized} =
+	nested_after_1({{throw,{V,x1}},throw,{V,x1}},
+		       {'add',{a,b}}, {value,{V,x3}}),
+    ?line {{caught,{error,badarg}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_after_1({{throw,{V,x1}},throw,{V,x1}},
+		       {'add',{a,b}}, {'abs',V}),
+    %%
+    ?line {{caught,{throw,{V,x1}}},
+	   {V,x3},
+	   undefined,
+	   finalized} =
+	nested_after_1({{throw,{V,x1}},rethrow,void},
+		       void, {value,{V,x3}}),
+    ?line {{caught,{error,badarith}},
+	   undefined,
+	   undefined,
+	   finalized} =
+	nested_after_1({{throw,{V,x1}},rethrow,void},
+		       void, {'div',{1,0}}),
+    ok.
+
+nested_after_1({X1,C1,V1},
+	    X2, X3) ->
+    erase(nested3),
+    erase(nested4),
+    erase(nested),
+    Self = self(),
+    Try =
+	try
+            try self()
+            after
+                After =
+                    try
+                        foo(X1)
+	            of
+	                V1 -> {value1,foo(X2)}
+                    catch
+                        C1:V1 -> {caught1,foo(X2)}
+	            after
+                        put(nested3, foo(X3))
+                    end,
+                put(nested4, After)
+            end
+        of
+            Self -> value
+        catch
+            C:D -> {caught,{C,D}}
+        after
+            put(nested, finalized)
+	end,
+    {Try,erase(nested3),erase(nested4),erase(nested)}.
+
+foo({value,Value}) -> Value;
+foo({'div',{A,B}}) ->
+    my_div(A, B);
+foo({'add',{A,B}}) ->
+    my_add(A, B);
+foo({'abs',X}) ->
+    my_abs(X);
+foo({error,Error}) ->
+    erlang:error(Error);
+foo({throw,Throw}) ->
+    erlang:throw(Throw);
+foo({exit,Exit}) ->
+    erlang:exit(Exit);
+foo({raise,{Class,Reason}}) ->
+    erlang:raise(Class, Reason).
+%%foo(function_clause) -> % must not be defined!
+
+my_div(A, B) ->
+    A div B.
+
+my_add(A, B) ->
+    A + B.
+
+my_abs(X) -> abs(X).
+
+id(I) -> I.