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7434caca05
This fixes a segfault on infinite function call recursion (rather than
infinite thunk recursion) by tracking the function call depth in
`EvalState`.
Additionally, to avoid printing extremely long stack traces, stack
frames are now deduplicated, with a `(19997 duplicate traces omitted)`
message. This should only really be triggered in infinite recursion
scenarios.
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)
| ^
$ nix-instantiate --eval --expr '(x: x x) (x: x x)' --show-trace
error:
… from call site
at «string»:1:1:
1| (x: x x) (x: x x)
| ^
… while calling anonymous lambda
at «string»:1:2:
1| (x: x x) (x: x x)
| ^
… from call site
at «string»:1:5:
1| (x: x x) (x: x x)
| ^
… while calling anonymous lambda
at «string»:1:11:
1| (x: x x) (x: x x)
| ^
… from call site
at «string»:1:14:
1| (x: x x) (x: x x)
| ^
(19997 duplicate traces omitted)
error: stack overflow
at «string»:1:14:
1| (x: x x) (x: x x)
| ^
58 lines
1.7 KiB
Plaintext
58 lines
1.7 KiB
Plaintext
error:
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… from call site
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at /pwd/lang/eval-fail-mutual-recursion.nix:36:3:
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35| in
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36| throwAfterA true 10
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| ^
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37|
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… while calling 'throwAfterA'
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at /pwd/lang/eval-fail-mutual-recursion.nix:29:26:
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28|
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29| throwAfterA = recurse: n:
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| ^
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30| if n > 0
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… from call site
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at /pwd/lang/eval-fail-mutual-recursion.nix:31:10:
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30| if n > 0
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31| then throwAfterA recurse (n - 1)
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| ^
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32| else if recurse
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(19 duplicate frames omitted)
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… from call site
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at /pwd/lang/eval-fail-mutual-recursion.nix:33:10:
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32| else if recurse
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33| then throwAfterB true 10
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| ^
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34| else throw "Uh oh!";
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… while calling 'throwAfterB'
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at /pwd/lang/eval-fail-mutual-recursion.nix:22:26:
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21| let
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22| throwAfterB = recurse: n:
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| ^
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23| if n > 0
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… from call site
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at /pwd/lang/eval-fail-mutual-recursion.nix:24:10:
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23| if n > 0
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24| then throwAfterB recurse (n - 1)
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| ^
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25| else if recurse
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(19 duplicate frames omitted)
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… from call site
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at /pwd/lang/eval-fail-mutual-recursion.nix:26:10:
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25| else if recurse
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26| then throwAfterA false 10
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| ^
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27| else throw "Uh oh!";
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(21 duplicate frames omitted)
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error: Uh oh!
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