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+#!/bin/sh
+
+test_description='see how we handle various forms of corruption'
+. ./test-lib.sh
+
+# convert "1234abcd" to ".git/objects/12/34abcd"
+obj_to_file() {
+ echo "$(git rev-parse --git-dir)/objects/$(git rev-parse "$1" | sed 's,..,&/,')"
+}
+
+# Convert byte at offset "$2" of object "$1" into '\0'
+corrupt_byte() {
+ obj_file=$(obj_to_file "$1") &&
+ chmod +w "$obj_file" &&
+ printf '\0' | dd of="$obj_file" bs=1 seek="$2" conv=notrunc
+}
+
+test_expect_success 'setup corrupt repo' '
+ git init bit-error &&
+ (
+ cd bit-error &&
+ test_commit content &&
+ corrupt_byte HEAD:content.t 10
+ )
+'
+
+test_expect_success 'streaming a corrupt blob fails' '
+ (
+ cd bit-error &&
+ test_must_fail git cat-file blob HEAD:content.t
+ )
+'
+
+test_done