Open andrewimeson opened 1 week ago
Confirmed that it broke in 3.9.0. It works in 3.8.0.
With git bisect
I've determined that #1066 / a89b0be5ed0a8a3f367a5dc21326d7a39ab5c26f is the commit that broke it.
I tried to write a test that would fail, but I can't seem to get a go test
(or a CI run in my fork) to fail with my changes (still fails/hangs with the gosh
interpreter). It does fail the CI run for Windows with "TODO: support process substitution on Windows," but I don't care about Windows 😀
diff --git a/interp/interp_test.go b/interp/interp_test.go
index 8b535ce3..4a4e1f2a 100644
--- a/interp/interp_test.go
+++ b/interp/interp_test.go
@@ -2905,6 +2905,10 @@ done <<< 2`,
"while read a; do echo $a; GOSH_CMD=exec_ok $GOSH_PROG; done <<EOF\na\nb\nc\nEOF",
"a\nexec ok\nb\nexec ok\nc\nexec ok\n",
},
+ {
+ "while read a; do echo $a; done < <(echo x)",
+ "x\n",
+ },
// TODO: our final exit status here isn't right.
// {
// "while read a; do echo $a; GOSH_CMD=exec_fail $GOSH_PROG; done <<< 'a\nb\nc'",
$ cd interp/
$ go test
PASS
ok mvdan.cc/sh/v3/interp 2.808s
Here's a better test that won't run into Windows compatibility issues. I've based off of 3.8.0 and confirmed it passes in CI and it fails in CI for master.
diff --git a/interp/interp_test.go b/interp/interp_test.go
index 8b535ce3..877d8c7a 100644
--- a/interp/interp_test.go
+++ b/interp/interp_test.go
@@ -2905,6 +2905,10 @@ done <<< 2`,
"while read a; do echo $a; GOSH_CMD=exec_ok $GOSH_PROG; done <<EOF\na\nb\nc\nEOF",
"a\nexec ok\nb\nexec ok\nc\nexec ok\n",
},
+ {
+ "echo x > f; while read a; do echo $a; done < f",
+ "x\n",
+ },
// TODO: our final exit status here isn't right.
// {
// "while read a; do echo $a; GOSH_CMD=exec_fail $GOSH_PROG; done <<< 'a\nb\nc'",
No idea how to solve the actual bug.
In v3.9.0 of the gosh interpreter there is an issue with reading from file or file substitutions in
while
loops. The script just hangs when attempting to read from a file or file substitution.This did work recently. I haven't narrowed down the exact version it broke in yet. I discovered this through it breaking in my Taskfile usage.
Examples
Works: Reading from pipe
Hangs: Reading from file
results in this hanging forever
Hangs: Reading from file substitution
results in this hanging forever