[PATCH 3/4] test_must_fail: report number of unexpected signal

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If a command is marked as test_must_fail but dies with a
signal, we consider that a problem and report the error to
stderr. However, we don't say _which_ signal; knowing that
can make debugging easier. Let's share as much as we know.

Signed-off-by: Jeff King <peff@xxxxxxxx>
---
Not necessary for the fix, obviously, but I implemented this while
trying to figure out what in the world was going on with the
write_or_die() thing. :)

 t/test-lib-functions.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index c64e5a5..8d99eb3 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -617,7 +617,7 @@ test_must_fail () {
 		return 0
 	elif test $exit_code -gt 129 && test $exit_code -le 192
 	then
-		echo >&2 "test_must_fail: died by signal: $*"
+		echo >&2 "test_must_fail: died by signal $(($exit_code - 128)): $*"
 		return 1
 	elif test $exit_code -eq 127
 	then
-- 
2.7.2.645.g4e1306c

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