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Forbid labelled or-branch expressions within defer #4271

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Sep 19, 2024
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Forbid labelled or-branch expressions within defer #4271

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4 changes: 4 additions & 0 deletions src/check_expr.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -9131,6 +9131,10 @@ gb_internal ExprKind check_or_branch_expr(CheckerContext *c, Operand *o, Ast *no
}

if (label != nullptr) {
if (c->in_defer) {
error(label, "A labelled '%.*s' cannot be used within a 'defer'", LIT(name));
return Expr_Expr;
}
if (label->kind != Ast_Ident) {
error(label, "A branch statement's label name must be an identifier");
return Expr_Expr;
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