[pbs-devel] [PATCH proxmox-backup] server/worker_task: fix upid_read_status

[Dominik Csapak <d.csapak@proxmox.com>]

a range from high to low in rust results in an empty range
(see std::ops::Range documentation)
so we need to generate the range from 0..data.len() and then reverse it

also, the task log contains a newline at the end, so we have to remove
that (should it exist)

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
maybe it would be nicer (but slower) to use the .lines() iterator?
to not run into such things?

 src/server/worker_task.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/server/worker_task.rs b/src/server/worker_task.rs
index 997c2492..28e62ba2 100644
--- a/src/server/worker_task.rs
+++ b/src/server/worker_task.rs
@@ -210,9 +210,14 @@ pub fn upid_read_status(upid: &UPID) -> Result<TaskState, Error> {
     let mut data = Vec::with_capacity(8192);
     file.read_to_end(&mut data)?;
 
+    // task logs should end with newline, we do not want it here
+    if data[data.len()-1] == b'\n' {
+        data.pop();
+    }
+
     let last_line = {
         let mut start = 0;
-        for pos in data.len()-1..=0 {
+        for pos in (0..data.len()).rev() {
             if data[pos] == b'\n' {
                 start = pos + 1;
                 break;
-- 
2.20.1