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-rw-r--r--lib/compiler/src/beam_except.erl8
-rw-r--r--lib/compiler/test/beam_except_SUITE.erl26
2 files changed, 28 insertions, 6 deletions
diff --git a/lib/compiler/src/beam_except.erl b/lib/compiler/src/beam_except.erl
index cb3a6b79de..4a181c1923 100644
--- a/lib/compiler/src/beam_except.erl
+++ b/lib/compiler/src/beam_except.erl
@@ -133,10 +133,12 @@ translate_exception(_, _, _, _) -> no.
fix_block(Is, 0) ->
reverse(Is);
fix_block(Is, Words) ->
- fix_block_1(reverse(Is), Words).
+ reverse(fix_block_1(Is, Words)).
-fix_block_1([{set,[],[],{alloc,Live,{F1,F2,Needed,F3}}}|Is], Words) ->
- [{set,[],[],{alloc,Live,{F1,F2,Needed-Words,F3}}}|Is];
+fix_block_1([{set,[],[],{alloc,Live,{F1,F2,Needed0,F3}}}|Is], Words) ->
+ Needed = Needed0 - Words,
+ true = Needed >= 0, %Assertion.
+ [{set,[],[],{alloc,Live,{F1,F2,Needed,F3}}}|Is];
fix_block_1([I|Is], Words) ->
[I|fix_block_1(Is, Words)].
diff --git a/lib/compiler/test/beam_except_SUITE.erl b/lib/compiler/test/beam_except_SUITE.erl
index 8746e62fb9..47367d6eab 100644
--- a/lib/compiler/test/beam_except_SUITE.erl
+++ b/lib/compiler/test/beam_except_SUITE.erl
@@ -21,15 +21,18 @@
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2,
- coverage/1]).
+ multiple_allocs/1,coverage/1]).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
- [coverage].
+ test_lib:recompile(?MODULE),
+ [{group,p}].
groups() ->
- [].
+ [{p,[parallel],
+ [multiple_allocs,
+ coverage]}].
init_per_suite(Config) ->
Config.
@@ -43,6 +46,23 @@ init_per_group(_GroupName, Config) ->
end_per_group(_GroupName, Config) ->
Config.
+multiple_allocs(_Config) ->
+ {'EXIT',{{badmatch,#{true:=[p]}},_}} =
+ (catch could(pda, 0.0, {false,true}, {p})),
+ {'EXIT',{function_clause,_}} = (catch place(lee)),
+ {'EXIT',{{badmatch,wanted},_}} = (catch conditions()),
+
+ ok.
+
+could(Coupons = pda, Favorite = _pleasure = 0.0, {_, true}, {Presents}) ->
+ (0 = true) = #{true => [Presents]}.
+
+place(lee) ->
+ (pregnancy = presentations) = [hours | [purchase || _ <- 0]] + wine.
+
+conditions() ->
+ (talking = going) = storage + [large = wanted].
+
coverage(_) ->
File = {file,"fake.erl"},
ok = fc(a),