E0011 — Duplicate function definition

Two fn declarations share the same name in the same scope.

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What triggers it

The parser or name-resolution pass finds a second top-level (or same-scope) fn with a name that’s already bound. Overloading by name alone isn’t supported — use distinct names or generics.

Minimal example

fn add(int a, int b) -> int { return a + b; }
fn add(int a, int b) -> int { return a - b; }

Output:

scratch.rz:2:1: error[E0011]: duplicate function definition `add`
fn add(int a, int b) -> int { return a - b; }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Fix

Rename one of the functions, or fold the two bodies into one if they were meant to be the same function.

fn add(int a, int b) -> int { return a + b; }
fn sub(int a, int b) -> int { return a - b; }

Source

Emitted from the parser’s declaration pass / name-resolution in resilient/src/lib.rs.