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fix a stack overflow in the expression parser

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This commit is contained in:
Geoffroy Couprie 2021-08-17 16:46:20 +02:00
parent 8b453bd024
commit 485147144c
1 changed files with 7 additions and 3 deletions
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10
fuzz/fuzz_targets/fuzz_arithmetic.rs
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@ -9,9 +9,9 @@ use nom::{
bytes::complete::tag,
character::complete::char,
character::complete::{digit1 as digit, space0 as space},
combinator::{map_res, verify},
combinator::{map, map_res, verify},
multi::fold_many0,
sequence::{delimited, pair},
sequence::{delimited, pair, terminated},
IResult,
};
@ -48,7 +48,11 @@ fn decr() {
}
fn parens(i: &str) -> IResult<&str, i64> {
delimited(space, delimited(tag("("), expr, tag(")")), space)(i)
delimited(space, delimited(
terminated(tag("("), incr),
expr,
map(tag(")"), |_| decr())
), space)(i)
}