Backport a fix for nullPointerRedundantCheck

Add a patch backported from upstream that fixes a bug which breaks the
build of libkcapi (https://bugzilla.redhat.com/show_bug.cgi?id=1923600).

Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>

cppcheck-2.3-Fix-issue-10024-FP-nullPointerRedundantCheck-when-us.patch

@@ -0,0 +1,64 @@
+From 5c4dc7f32978243db8ea10153b3cd84d116a1d10 Mon Sep 17 00:00:00 2001
+From: Paul Fultz II <pfultz2@yahoo.com>
+Date: Mon, 14 Dec 2020 04:13:47 -0600
+Subject: [PATCH] Fix issue 10024: FP: nullPointerRedundantCheck when using a
+ goto statement (#2947)
+
+(cherry picked from commit da1375c9a3f3a3b7eae7aece5e2ba03e59973aa0)
+---
+ lib/reverseanalyzer.cpp  |  2 ++
+ test/testnullpointer.cpp | 18 ++++++++++++++++++
+ 2 files changed, 20 insertions(+)
+
+diff --git a/lib/reverseanalyzer.cpp b/lib/reverseanalyzer.cpp
+index a6a86f63e..31deda58d 100644
+--- a/lib/reverseanalyzer.cpp
++++ b/lib/reverseanalyzer.cpp
+@@ -124,6 +124,8 @@ struct ReverseTraversal {
+             }
+             if (Token::Match(tok, "return|break|continue"))
+                 break;
++            if (Token::Match(tok, "%name% :"))
++                break;
+             // Evaluate LHS of assignment before RHS
+             if (Token* assignTok = assignExpr(tok)) {
+                 Token* assignTop = assignTok;
+diff --git a/test/testnullpointer.cpp b/test/testnullpointer.cpp
+index 94d772911..8a3738fe9 100644
+--- a/test/testnullpointer.cpp
++++ b/test/testnullpointer.cpp
+@@ -106,6 +106,7 @@ private:
+         TEST_CASE(nullpointer63);
+         TEST_CASE(nullpointer64);
+         TEST_CASE(nullpointer65); // #9980
++        TEST_CASE(nullpointer66); // #10024
+         TEST_CASE(nullpointer_addressOf); // address of
+         TEST_CASE(nullpointerSwitch); // #2626
+         TEST_CASE(nullpointer_cast); // #4692
+@@ -2032,6 +2033,23 @@ private:
+         ASSERT_EQUALS("", errout.str());
+     }
+ 
++    void nullpointer66() {
++        check("int f() {\n"
++              "    int ret = 0;\n"
++              "    int *v = nullptr;\n"
++              "    if (!MyAlloc(&v)) {\n"
++              "        ret = -1;\n"
++              "        goto done;\n"
++              "    }\n"
++              "    DoSomething(*v);\n"
++              "done:\n"
++              "    if (v)\n"
++              "      MyFree(&v);\n"
++              "    return ret;\n"
++              "}\n");
++        ASSERT_EQUALS("", errout.str());
++    }
++
+     void nullpointer_addressOf() { // address of
+         check("void f() {\n"
+               "  struct X *x = 0;\n"
+-- 
+2.29.2
+

cppcheck.spec

@@ -14,6 +14,9 @@ Patch0:         cppcheck-2.2-translations.patch
 Patch1:         cppcheck-1.88-htmlreport-python3.patch
 # Fix for missing #include with gcc-11
 Patch2:         cppcheck-2.3-gcc11.patch
+# da1375c9a3f3 ("Fix issue 10024: FP: nullPointerRedundantCheck
+# when using a goto statement (#2947)")
+Patch3:         cppcheck-2.3-Fix-issue-10024-FP-nullPointerRedundantCheck-when-us.patch
 
 BuildRequires:  gcc-c++
 BuildRequires:  pcre-devel
@@ -60,6 +63,7 @@ from xml files first generated using cppcheck.
 %patch0 -p1 -b .translations
 %patch1 -p1 -b .python3
 %patch2 -p1 -b .gcc11
+%patch3 -p1 -b .nullptrcheck
 # Make sure bundled tinyxml2 is not used
 rm -r externals/tinyxml2
 # Generate the Qt online-help file