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Fix #15150 Duplicate accessMoved (passed by value to subfunction) #8969

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Fix #15150 Duplicate accessMoved (passed by value to subfunction) #8969

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7e345b3
Update valueflow.cpp
chrchr-github Oct 27, 2026
9d0880c
Update testother.cpp
chrchr-github Oct 27, 2026
f52e504
Fix
web-flow Oct 29, 2026
6c0e80e
Merge branch 'cppcheck-opensource:main' into chr_15150
chrchr-github Nov 2, 2026
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6 changes: 3 additions & 3 deletions lib/valueflow.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5739,11 +5739,11 @@ static void valueFlowSubFunction(const TokenList& tokenlist,
// passing value(s) to function
std::list<ValueFlow::Value> argvalues(getFunctionArgumentValues(argtok));

// Remove non-local lifetimes
argvalues.remove_if([](const ValueFlow::Value& v) {
// Remove non-local lifetimes and moved values
argvalues.remove_if([argvar](const ValueFlow::Value& v) {
if (v.isLifetimeValue())
return !v.isLocalLifetimeValue() && !v.isSubFunctionLifetimeValue();
return false;
return v.isMovedValue() && !argvar->isReference();
});
// Remove uninit values if argument is passed by value
if (argtok->variable() && !argtok->variable()->isPointer() && argvalues.size() == 1 &&
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25 changes: 25 additions & 0 deletions test/testother.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -312,6 +312,7 @@ class TestOther : public TestFixture {
TEST_CASE(movePointerAlias);
TEST_CASE(moveOutparam);
TEST_CASE(moveTryEmplace);
TEST_CASE(moveSubFunction);

TEST_CASE(funcArgNamesDifferent);
TEST_CASE(funcArgOrderDifferent);
Expand Down Expand Up @@ -13353,6 +13354,30 @@ class TestOther : public TestFixture {
ASSERT_EQUALS("", errout_str());
}

void moveSubFunction()
{
check("struct T {\n" // #15150
" void set(std::string a) { m = std::move(a); }\n"
" std::string m;\n"
"};\n"
"void f(std::string s) {\n"
" T t;\n"
" t.set(std::move(s));\n"
" t.set(s);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:8:11]: (warning) Access of moved variable 's'. [accessMoved]\n", errout_str());

check("void g(const std::string& s) {}\n"
"void h(std::string& r) { x = std::move(r); }\n"
"void f(std::string s1, std::string s2) {\n"
" t1 = std::move(s1);\n"
" t2 = std::move(s2);\n"
" g(s1);\n"
" h(s2);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:2:40]: (warning) Access of moved variable 'r'. [accessMoved]\n", errout_str());
}

void funcArgNamesDifferent() {
check("void func1(int a, int b, int c);\n"
"void func1(int a, int b, int c) { }\n"
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