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segfault with ${var[@]@A}
From: |
Grisha Levit |
Subject: |
segfault with ${var[@]@A} |
Date: |
Sun, 29 Jul 2018 17:49:33 -0400 |
If `var' is declared but not set, performing an @A or @a
transformation on double-quoted `var[@]' or `var[*]' will trigger a
segfault in dequote_string.
This is present in 4.4 and devel.
bash -c 'declare var; echo "${var[@]@A}"'
Segmentation fault: 11
This seems like the easy fix:
diff --git a/subst.c b/subst.c
index dbb38fae..2ae4a1ec 100644
--- a/subst.c
+++ b/subst.c
@@ -7320,7 +7320,7 @@ get_var_and_type (varname, value, ind, quoted,
flags, varp, valp)
vtype = VT_VARIABLE;
*varp = v;
if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- *valp = dequote_string (value);
+ *valp = value ? dequote_string (value) : savestring("");
else
*valp = dequote_escapes (value);
}
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- segfault with ${var[@]@A},
Grisha Levit <=