forked from lix-project/lix
eldritch horrors
96f1a404d0
Fix segfault on infinite recursion in some cases (cherry picked from commitbf1b294bd8) Change-Id:Id137541426ec8536567835953fccf986a3aebf16
37 lines
1 KiB
Nix
37 lines
1 KiB
Nix
# Check that stack frame deduplication only affects consecutive intervals, and
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# that they are reported independently of any preceding sections, even if
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# they're indistinguishable.
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#
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# In terms of the current implementation, we check that we clear the set of
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# "seen frames" after eliding a group of frames.
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#
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# Suppose we have:
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# - 10 frames in a function A
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# - 10 frames in a function B
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# - 10 frames in a function A
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#
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# We want to output:
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# - a few frames of A (skip the rest)
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# - a few frames of B (skip the rest)
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# - a few frames of A (skip the rest)
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#
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# If we implemented this in the naive manner, we'd instead get:
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# - a few frames of A (skip the rest)
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# - a few frames of B (skip the rest, _and_ skip the remaining frames of A)
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let
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throwAfterB = recurse: n:
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if n > 0
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then throwAfterB recurse (n - 1)
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else if recurse
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then throwAfterA false 10
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else throw "Uh oh!";
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throwAfterA = recurse: n:
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if n > 0
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then throwAfterA recurse (n - 1)
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else if recurse
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then throwAfterB true 10
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else throw "Uh oh!";
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in
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throwAfterA true 10
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