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---
synopsis: Some stack overflow segfaults are fixed
issues: 9616
prs: 9617
---
The number of nested function calls has been restricted, to detect and report
infinite function call recursions. The default maximum call depth is 10,000 and
can be set with [the `max-call-depth`
option](@docroot@/command-ref/conf-file.md#conf-max-call-depth).
This fixes segfaults or the following unhelpful error message in many cases:
error: stack overflow (possible infinite recursion)
Before:
```
$ nix-instantiate --eval --expr '(x: x x) (x: x x)'
Segmentation fault: 11
```
After:
```
$ nix-instantiate --eval --expr '(x: x x) (x: x x)'
error: stack overflow
at «string»:1:14:
1| (x: x x) (x: x x)
| ^
```
|
