This patch to the Go frontend reports an error when ++ or -- is used with a non-numeric type. This avoids a later compiler crash. This fixes GCC PR 83071. Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu. Committed to mainline.
Ian
Index: gcc/go/gofrontend/MERGE =================================================================== --- gcc/go/gofrontend/MERGE (revision 254748) +++ gcc/go/gofrontend/MERGE (working copy) @@ -1,4 +1,4 @@ -cb5dc1ce98857884a2215c461dd1d7de530f9f5e +5485b3faed476f6d051833d1790b5f77be9d1efc The first line of this file holds the git revision number of the last merge done from the gofrontend repository. Index: gcc/go/gofrontend/statements.cc =================================================================== --- gcc/go/gofrontend/statements.cc (revision 254748) +++ gcc/go/gofrontend/statements.cc (working copy) @@ -1826,6 +1826,11 @@ Statement* Inc_dec_statement::do_lower(Gogo*, Named_object*, Block*, Statement_inserter*) { Location loc = this->location(); + if (!this->expr_->type()->is_numeric_type()) + { + this->report_error("increment or decrement of non-numeric type"); + return Statement::make_error_statement(loc); + } Expression* oexpr = Expression::make_integer_ul(1, this->expr_->type(), loc); Operator op = this->is_inc_ ? OPERATOR_PLUSEQ : OPERATOR_MINUSEQ; return Statement::make_assignment_operation(op, this->expr_, oexpr, loc);