Fix ICE on missing procedure in base:runtime

When a required built-in procedure is missing from the base:runtime
package, an assert should be triggered. However this does not happen
and instead the compiler crashes silently. The cause is the
null-dereference after scope_lookup_current returns nullptr.

This adds an assertion that the runtime procedure is found, before
proceeding to check it's type and performing further lookups.

0 files changed, 0 insertions, 0 deletions