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-rw-r--r--src/tools/compiletest/src/read2.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/tools/compiletest/src/read2.rs b/src/tools/compiletest/src/read2.rs
index 725f7a1515c..a455a1badc0 100644
--- a/src/tools/compiletest/src/read2.rs
+++ b/src/tools/compiletest/src/read2.rs
@@ -83,7 +83,7 @@ impl ProcOutput {
                 }
 
                 let new_len = bytes.len();
-                if *filtered_len <= HEAD_LEN + TAIL_LEN {
+                if (*filtered_len).min(new_len) <= HEAD_LEN + TAIL_LEN {
                     return;
                 }