# Revise: MethodError JuliaInterpreter.ExprSplitter

**URL:** <https://discourse.julialang.org/t/revise-methoderror-juliainterpreter-exprsplitter/131309>\
**Category:** General Usage\
**Tags:** question, package\
**Created:** [August 2, 2025, 8:50pm UTC](https://discourse.julialang.org/t/revise-methoderror-juliainterpreter-exprsplitter/131309 "2025-08-02T20:50:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jlapeyre](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jlapeyre/32/4514_2.png) [@jlapeyre](https://discourse.julialang.org/u/jlapeyre)\
**Post date:** [August 2, 2025, 8:50pm UTC](https://discourse.julialang.org/t/revise-methoderror-juliainterpreter-exprsplitter/131309/1 "2025-08-02T20:50:22Z")

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I activate a project and work on it, using `Revise`. I save an edit in emacs and return to the REPL, and enter 1 and Return, and wait for `Revise`.

Frequently, I get this error:

```julia-auto
 Error: Failed to revise /path/to/edited/file.jl
│ exception =
│ MethodError: no method matching JuliaInterpreter.ExprSplitter(::Module, ::Symbol)
│ The type `JuliaInterpreter.ExprSplitter` exists, but no method is defined for this combination of argument types when trying to construct it.

```

This started happening a few weeks ago. I can’t predict how and when it happens. Searching online, I find no mention of a problem like this. Searching this forum, I find nothing as well.

Data:

- linux
- emacs
- Juia v 1.11 and 1.12
- Revise v3.8.1, v3.7.3, possibly others
- Startup packages: Happens sometimes with no packages except what I am developing.

I can’t predict when it will happen. It somtimes happens on every edit. i.e. I can start Julia, load Revise and the package, do one edit, and I get the error. Exit julia, repeat. Do one edit and I get the error.

The method that does exist takes an `Expr`, but the function is evidently called with a `Symbol` in that place. Quoting code can produce an `Expr`, but also a `Symbol` (and other stuff). It’s probably something like this. Or an `Expr` is being traversed and this function is somehow called without checking that an elment is in fact an `Expr`.

The stack trace does not really show a stack trace for the problem. I could try to find a way to actually display the stack of calls.

I suspect that my code is modifying the behavior of things in `Base` and `Revise`. This has happened with a couple of different packages.

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<div class="post-metadata">

**Author:** ![jlapeyre](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jlapeyre/32/4514_2.png) [@jlapeyre](https://discourse.julialang.org/u/jlapeyre)\
**Post date:** [August 4, 2025, 1:14pm UTC](https://discourse.julialang.org/t/revise-methoderror-juliainterpreter-exprsplitter/131309/2 "2025-08-04T13:14:12Z")

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It seems to be occurring only with specific files in a package. I suspect it is related to parsing. There may be some way to split the file up to look for a MWE.

I’m really surprised that I have not seen others raise this issue.