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compiler: don't crash on a, b := int(0)

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Fixes PR go/101851

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/341330
This commit is contained in:
Ian Lance Taylor 2021-08-10 16:13:01 -07:00
parent 05a03f3986
commit fed7c1634e
2 changed files with 14 additions and 3 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
d5d51242efc432fa62d4e9b141b01c280af32d19
7e092d2cc5af7648036496485b639f2c9db2f2d8
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

15
gcc/go/gofrontend/expressions.cc
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@ -11202,12 +11202,23 @@ Call_expression::do_lower(Gogo* gogo, Named_object* function,
{
Location loc = this->location();
if (this->is_error_expression())
return Expression::make_error(loc);
// A type cast can look like a function call.
if (this->fn_->is_type_expression()
&& this->args_ != NULL
&& this->args_->size() == 1)
return Expression::make_cast(this->fn_->type(), this->args_->front(),
loc);
{
if (this->expected_result_count_ != 0
&& this->expected_result_count_ != 1)
{
this->report_error(_("type conversion result count mismatch"));
return Expression::make_error(loc);
}
return Expression::make_cast(this->fn_->type(), this->args_->front(),
loc);
}
// Because do_type will return an error type and thus prevent future
// errors, check for that case now to ensure that the error gets