compiler: check error expression in Array_type::get_backend_length
Otherwise, a zero length is created in the backend and the backend doesn't know there is an error. Reviewed-on: https://go-review.googlesource.com/61610 From-SVN: r252849
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@ -1,4 +1,4 @@
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4e063a8eee636cce17aea48c7183e78431174de3
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The first line of this file holds the git revision number of the last
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merge done from the gofrontend repository.
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@ -7638,6 +7638,11 @@ Array_type::get_backend_length(Gogo* gogo)
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go_assert(this->length_ != NULL);
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if (this->blength_ == NULL)
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{
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if (this->length_->is_error_expression())
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{
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this->blength_ = gogo->backend()->error_expression();
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return this->blength_;
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}
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Numeric_constant nc;
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mpz_t val;
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if (this->length_->numeric_constant_value(&nc) && nc.to_int(&val))
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