File 1007-Fix-crash-in-beam_bool.patch of Package erlang

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File 1007-Fix-crash-in-beam_bool.patch of Package erlang (Revision b31a222d17452b4f889310930aa1eb06)

Currently displaying revision b31a222d17452b4f889310930aa1eb06 , Show latest

From 1ee690bef4c44eeb72c958a517a156cfb45600b7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Tue, 26 Jul 2022 13:12:36 +0200
Subject: [PATCH] Fix crash in beam_bool

Fixes #6164
---
 lib/compiler/src/beam_ssa_bool.erl |  7 +++++--
 lib/compiler/test/guard_SUITE.erl  | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/lib/compiler/src/beam_ssa_bool.erl b/lib/compiler/src/beam_ssa_bool.erl
index 6efab4fd07..7a7209e197 100644
--- a/lib/compiler/src/beam_ssa_bool.erl
+++ b/lib/compiler/src/beam_ssa_bool.erl
@@ -1066,10 +1066,13 @@ redirect_test(Bool, SuccFail, G0, St) ->
 redirect_test_1(V, SuccFail, G) ->
     case get_targets(V, G) of
         {br,_Succ,Fail} ->
-            %% I have only seen this happen in code generated by LFE
-            %% (in lfe_andor_SUITE.core and lfe_guard_SUITE.core)
+            %% This is rare when compiling from Erlang code. It is
+            %% more frequent for generated by another code generator
+            %% such as the one in LFE (see lfe_andor_SUITE.core and
+            %% lfe_guard_SUITE.core).
             case SuccFail of
                 {fail,Fail} -> G;
+                {fail,_} -> not_possible();
                 {succ,_} -> not_possible()
             end;
         {br,Next} ->
diff --git a/lib/compiler/test/guard_SUITE.erl b/lib/compiler/test/guard_SUITE.erl
index ba89255e7b..9664b4cbfd 100644
--- a/lib/compiler/test/guard_SUITE.erl
+++ b/lib/compiler/test/guard_SUITE.erl
@@ -2312,6 +2312,7 @@ beam_bool_SUITE(_Config) ->
     erl1253(),
     erl1384(),
     gh4788(),
+    gh_6164(),
     ok.
 
 before_and_inside_if() ->
@@ -2802,6 +2803,23 @@ do_gh4788(N) ->
     end,
     ok.
 
+gh_6164() ->
+    true = do_gh_6164(id([])),
+    {'EXIT',{{case_clause,42},_}} = catch do_gh_6164(id(0)),
+
+    ok.
+
+do_gh_6164(V1) ->
+    case 42 of
+        V2 ->
+            case is_list(V1) of
+                V3 ->
+                    case V3 orelse V2 of
+                        _ when V3 -> 100
+                    end =< V3
+            end
+    end.
+
 %%%
 %%% End of beam_bool_SUITE tests.
 %%%
-- 
2.35.3

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File 1007-Fix-crash-in-beam_bool.patch of Package erlang (Revision b31a222d17452b4f889310930aa1eb06)

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