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Prevent stack overflow when building THIR

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This commit is contained in:
LeSeulArtichaut 2021-03-06 22:41:47 +01:00
parent cd049ef9ea
commit 5f38c839ad
1 changed files with 3 additions and 1 deletions
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4
compiler/rustc_mir_build/src/thir/cx/expr.rs
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@ -1,6 +1,7 @@
use crate::thir::cx::Cx; use crate::thir::cx::Cx;
use crate::thir::util::UserAnnotatedTyHelpers; use crate::thir::util::UserAnnotatedTyHelpers;
use crate::thir::*; use crate::thir::*;
use rustc_data_structures::stack::ensure_sufficient_stack;
use rustc_hir as hir; use rustc_hir as hir;
use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res}; use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res};
use rustc_index::vec::Idx; use rustc_index::vec::Idx;
@ -23,7 +24,8 @@ impl<'thir, 'tcx> Cx<'thir, 'tcx> {
/// ///
/// [`mirror_exprs`]: Self::mirror_exprs /// [`mirror_exprs`]: Self::mirror_exprs
crate fn mirror_expr(&mut self, expr: &'tcx hir::Expr<'tcx>) -> &'thir Expr<'thir, 'tcx> { crate fn mirror_expr(&mut self, expr: &'tcx hir::Expr<'tcx>) -> &'thir Expr<'thir, 'tcx> {
self.arena.alloc(self.mirror_expr_inner(expr)) // `mirror_expr` is recursing very deep. Make sure the stack doesn't overflow.
ensure_sufficient_stack(|| self.arena.alloc(self.mirror_expr_inner(expr)))
} }
/// Mirrors and allocates a slice of [`hir::Expr`]s. They will be allocated as a /// Mirrors and allocates a slice of [`hir::Expr`]s. They will be allocated as a