[Bug 235589] sh(1): LINENO is always 0 in shell arithmetic

[bugzilla-noreply at freebsd.org]

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: bugs at FreeBSD.org
          Reporter: mcdutchie at hotmail.com

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"

-- 
You are receiving this mail because:
You are the assignee for the bug.