checkautovariable: fix #7818, crash when accessing nullpointer tok2->next().
Not test case added yet because I failed to add it as .h files to testgarbage.
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@ -471,7 +471,7 @@ void CheckAutoVariables::returnReference()
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// have we reached a function that returns a reference?
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if (tok->previous() && tok->previous()->str() == "&") {
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for (const Token *tok2 = scope->classStart->next(); tok2 && tok2 != scope->classEnd; tok2 = tok2->next()) {
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for (const Token *tok2 = scope->classStart->next(); tok2 && tok2 != scope->classEnd && tok2->next(); tok2 = tok2->next()) {
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if (!tok2->scope()->isExecutable()) {
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tok2 = tok2->scope()->classEnd;
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continue;
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