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authorHans Bolinder <[email protected]>2018-09-10 12:20:57 +0200
committerHans Bolinder <[email protected]>2018-09-10 12:20:57 +0200
commit7db359b7a1d9b33b25750b29c92c6074ab415c45 (patch)
treed506e9998d089cd865fe8d0b25862db21b3bbcbc /lib/syntax_tools
parent4f11bb85a427d60ca55ffa63128f17b9dba98bd6 (diff)
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syntax_tools: Correct unfolding of the stacktrace variable
The bug was introduced in 9ab233. See also https://bugs.erlang.org/browse/ERL-719.
Diffstat (limited to 'lib/syntax_tools')
-rw-r--r--lib/syntax_tools/src/erl_syntax.erl2
-rw-r--r--lib/syntax_tools/test/merl_SUITE.erl14
2 files changed, 13 insertions, 3 deletions
diff --git a/lib/syntax_tools/src/erl_syntax.erl b/lib/syntax_tools/src/erl_syntax.erl
index 758aff32fd..331081a07e 100644
--- a/lib/syntax_tools/src/erl_syntax.erl
+++ b/lib/syntax_tools/src/erl_syntax.erl
@@ -3897,7 +3897,7 @@ unfold_try_clauses(Cs) ->
unfold_try_clause({clause, Pos, [{tuple, _, [{atom, _, throw},
V,
- [{var, _, '_'}]]}],
+ {var, _, '_'}]}],
Guard, Body}) ->
{clause, Pos, [V], Guard, Body};
unfold_try_clause({clause, Pos, [{tuple, _, [C, V, Stacktrace]}],
diff --git a/lib/syntax_tools/test/merl_SUITE.erl b/lib/syntax_tools/test/merl_SUITE.erl
index 52bbd9b3b8..6389ad7738 100644
--- a/lib/syntax_tools/test/merl_SUITE.erl
+++ b/lib/syntax_tools/test/merl_SUITE.erl
@@ -30,13 +30,14 @@
%% Test cases
-export([merl_smoke_test/1,
- transform_parse_error_test/1]).
+ transform_parse_error_test/1, otp_15291/1]).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[merl_smoke_test,
- transform_parse_error_test].
+ transform_parse_error_test,
+ otp_15291].
groups() ->
[].
@@ -101,6 +102,15 @@ transform_parse_error_test(_Config) ->
[?Q("merl:qquote(2, \"{\", [{var, V}])")], []))),
ok.
+otp_15291(_Config) ->
+ C0 = merl:quote("() -> ok"),
+ {clause,1,[],[],[{atom,1,ok}]} = C0,
+ C2 = merl:quote("(_,_) -> ok"),
+ {clause,1,[{var,1,'_'},{var,1,'_'}],[],[{atom,1,ok}]} = C2,
+ C1 = merl:quote("(_) -> ok"),
+ {clause,1,[{var,1,'_'}],[],[{atom,1,ok}]} = C1,
+ ok.
+
%% utilities
f(Ts) when is_list(Ts) ->