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Compiler limits

X07 intentionally enforces size limits during compilation to keep builds deterministic and resource-bounded.

If you hit these limits in a real project, first confirm you are not accidentally generating large modules (for example, embedding huge fixtures directly into *.x07.json). If the size is expected, raise the limits for the build that needs it.

Defaults​

The compiler currently enforces:

  • Maximum source bytes per module: 65_536
  • Maximum AST nodes per module: 250_000
  • Maximum locals per function: 20_000
  • Maximum emitted C bytes (per compilation unit): 33_554_432

Overrides​

You can override the defaults using environment variables:

  • X07_MAX_AST_NODES
  • X07_MAX_LOCALS
  • X07_MAX_C_BYTES

Values must be positive integers. Invalid values fall back to the defaults.