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Invalid Recursive Enum (2+ occurances) causes compiler out-of-memory on beta/nightly #32326

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alex-ozdemir opened this Issue Mar 18, 2016 · 2 comments

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@nikomatsakis nikomatsakis

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P-high T-compiler regression-from-stable-to-beta
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@alex-ozdemir @nikomatsakis @eddyb @rust-highfive
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alex-ozdemir commented Mar 18, 2016

For example, compiling

enum Expr {
    Plus(Expr, Expr),
    Literal(i64),
}

with rustc causes the error message fatal runtime error: out of memory

Single occurrences seem to work fine.

@eddyb eddyb added regression-from-stable-to-beta I-nominated T-compiler labels Mar 18, 2016

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nikomatsakis commented Mar 18, 2016

Yeah, I can imagine why this is happening. We are exploring out the nested obligations in a breadth-first-fashion, and hence this blows up memory usage dramatically.

@llogiq llogiq referenced this issue Mar 22, 2016

Closed

lint recursive enums #787

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nikomatsakis commented Mar 24, 2016

triage: P-high

@rust-highfive rust-highfive added P-high and removed I-nominated labels Mar 24, 2016

@nikomatsakis nikomatsakis referenced this issue Mar 24, 2016

Closed

Recursive struct hangs compilation on Nightly 03-19 #32417

This was referenced Mar 26, 2016

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@nikomatsakis nikomatsakis referenced this issue Mar 29, 2016

Merged

process cycles as soon as they are detected #32582

@nagisa nagisa referenced this issue Mar 30, 2016

Closed

Recursive type results in infinite recursion #32619

@pnkfelix pnkfelix assigned nikomatsakis Mar 31, 2016

bors added a commit that referenced this issue Apr 4, 2016

@bors
Auto merge of #32582 - nikomatsakis:issue-32326, r=aturon 
process cycles as soon as they are detected

We used to wait for the recursion limit, but that might well be too
long!

Fixes #32326
r? @aturon
8d5e845

@bors bors closed this in #32582 Apr 4, 2016

yberreby added a commit to yberreby/rgo that referenced this issue Apr 17, 2016

@yberreby
ast: get it to compile 
rust-lang/rust#32326 is very annoying
4de62a8

@rkruppe rkruppe referenced this issue May 1, 2016

Closed

Rustc compiler freezes when creating a recursive data structure #33310

@jonas-schievink jonas-schievink referenced this issue May 6, 2016

Closed

Some recursive definitions of structs/enums cause compiler to hang #33467

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