Symbol source error message should clearer when a symbol can not be expanded.

Description

When using the symbol sources it can be quite difficult to determine if a symbol is non-expandable (no replacement exists). This usually results in a 'cyclic error message from the default symbol source'. The error should (at least) indicate what symbol (and where) is non-expandable.

This is a result of investigating HIVEMIND-170 - https://issues.apache.org/jira/browse/HIVEMIND-170

Environment

None

Status

Assignee

JohanL

Reporter

JohanL

Labels

None

Components

Fix versions

Affects versions

1.0

Priority

Major
Configure