https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235589
Bug ID: 235589
Summary: sh(1): LINENO is always 0 in shell arithmetic
Product: Base System
Version: 12.0-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
In sh(1), the LINENO variable (currently executed line number) is always zero
when it is read as part of a shell arithmetic expression.
For instance:
$ echo $LINENO $((LINENO)) $(($LINENO))
108 0 108
Expected: 3 times "108" (or whatever the current line number is)
Note that $(($LINENO)) does work because it expands LINENO as a normal shell
expansion before invoking the arithmetic subsystem. However, $((LINENO)) should
be equivalent as it is for all other variables.
Another manifestation of the bug is:
$ set -u
$ echo $((LINENO))
-sh: arithmetic expression: variable not set: "LINENO"
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