Patch from Tim Peters to repare a the problem that tracebacks are off

gvanrossum · gvanrossum · commit dc8b56915534 · 1999-04-19T17:54:19.000Z
by a line when Python is run with -x.
diff --git a/Modules/main.c b/Modules/main.c
@@ -197,8 +197,15 @@ Py_Main(argc, argv)
 				exit(2);
 			}
 			else if (skipfirstline) {
-				char line[256];
-				fgets(line, sizeof line, fp);
+				int ch;
+				/* Push back first newline so line numbers
+				   remain the same */
+				while ((ch = getc(fp)) != EOF) {
+					if (ch == '\n') {
+						(void)ungetc(ch, fp);
+						break;
+					}
+				}
 			}
 		}
 	}

Original file line number	Diff line number	Diff line change
`@@ -197,8 +197,15 @@ Py_Main(argc, argv)`
`197`	`197`	`exit(2);`
`198`	`198`	`}`
`199`	`199`	`else if (skipfirstline) {`
`200`		`- char line[256];`
`201`		`- fgets(line, sizeof line, fp);`
	`200`	`+ int ch;`
	`201`	`+ /* Push back first newline so line numbers`
	`202`	`+ remain the same */`
	`203`	`+ while ((ch = getc(fp)) != EOF) {`
	`204`	`+ if (ch == '\n') {`
	`205`	`+ (void)ungetc(ch, fp);`
	`206`	`+ break;`
	`207`	`+ }`
	`208`	`+ }`
`202`	`209`	`}`
`203`	`210`	`}`
`204`	`211`	`}`