Compare error prompts of different awk flavours

Awk requires the opening brace of an action must be on the same line as the pattern it accompanies. I compared error prompts of different awk flavours, and my OS is NetBSD.

(1) awk shipped in NetBSD:

# awk 'BEGIN
> {print "Hello Awk!"}'
awk: syntax error at source line 2
 context is
        BEGIN >>>
 <<<
awk: bailing out at source line 2

(2) nawk:

# nawk 'BEGIN
{print "Hello Awk!"}'
nawk: syntax error at source line 2
 context is
        BEGIN >>>
 <<<
nawk: bailing out at source line 2

(3) mawk:

# mawk 'BEGIN
{print "Hello Awk!"}'
mawk: line 1: syntax error at or near end of line

(4) gawk:

# gawk 'BEGIN
{print "Hello Awk!"}'
gawk: cmd. line:2: BEGIN blocks must have an action part

IMHO, gawk gives more clear clues for this error.