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Fix bogus list-iteration code in pg_regress.c, affecting ecpg tests only.

While looking at a recent buildfarm failure in the ecpg tests, I wonderedwhy the pg_regress output claimed the stderr part of the test failed, whenthe regression diffs were clearly for the stdout part. Looking into it,the reason is that pg_regress.c's logic for iterating over three parallellists is wrong, and has been wrong since it was written: it advances the"tag" pointer at a different place in the loop than the other two pointers.Fix that.

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src/test/regress
- pg_regress.c

1 file changed

-10

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`‎src/test/regress/pg_regress.c`

Lines changed: 4 additions & 10 deletions

Original file line number	Diff line number	Diff line change
`@@ -1742,14 +1742,11 @@ run_schedule(const char *schedule, test_function tfunc)`
`1742`	`1742`	`*/`
`1743`	`1743`	`for (rl=resultfiles[i],el=expectfiles[i],tl=tags[i];`
`1744`	`1744`	`rl!=NULL;/* rl and el have the same length */`
`1745`		`-rl=rl->next,el=el->next)`
	`1745`	`+rl=rl->next,el=el->next,`
	`1746`	`+tl=tl ?tl->next :NULL)`
`1746`	`1747`	`{`
`1747`	`1748`	`boolnewdiff;`
`1748`	`1749`
`1749`		`-if (tl)`
`1750`		`-tl=tl->next;/* tl has the same length as rl and el if`
`1751`		`- * it exists */`
`1752`		`-`
`1753`	`1750`	`newdiff=results_differ(tests[i],rl->str,el->str);`
`1754`	`1751`	`if (newdiff&&tl)`
`1755`	`1752`	`{`
`@@ -1829,14 +1826,11 @@ run_single_test(const char *test, test_function tfunc)`
`1829`	`1826`	`*/`
`1830`	`1827`	`for (rl=resultfiles,el=expectfiles,tl=tags;`
`1831`	`1828`	`rl!=NULL;/* rl and el have the same length */`
`1832`		`-rl=rl->next,el=el->next)`
	`1829`	`+rl=rl->next,el=el->next,`
	`1830`	`+tl=tl ?tl->next :NULL)`
`1833`	`1831`	`{`
`1834`	`1832`	`boolnewdiff;`
`1835`	`1833`
`1836`		`-if (tl)`
`1837`		`-tl=tl->next;/* tl has the same length as rl and el if it`
`1838`		`- * exists */`
`1839`		`-`
`1840`	`1834`	`newdiff=results_differ(test,rl->str,el->str);`
`1841`	`1835`	`if (newdiff&&tl)`
`1842`	`1836`	`{`

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`‎src/test/regress/pg_regress.c`

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