# M0019 internal compiler error (/docs/diagnostics/codes/m0019)

This is a bug in marmot, not in your code. The report bundle has what is needed to reproduce it.

## The fix [#the-fix]

Report the bug with the bundle. As a workaround try -O 0, or MARMOT_TIER0=0.

See also [all error codes](/docs/diagnostics/codes) and [marmot explain](/docs/commands/explain).