Backport "fix: scoverage statement's line number should be 1-base" to LTS (#19236)

Backports #18932 to the LTS branch.

PR submitted by the release tooling.

Author: Kordyjan

compiler/src/dotty/tools/dotc/coverage/Coverage.scala

@@ -11,7 +11,12 @@ class Coverage:
 
   def addStatement(stmt: Statement): Unit = statementsById(stmt.id) = stmt
 
-/** A statement that can be invoked, and thus counted as "covered" by code coverage tools. */
+
+/**
+  * A statement that can be invoked, and thus counted as "covered" by code coverage tools.
+  *
+  * @param line 1-indexed line number
+  */
 case class Statement(
     location: Location,
     id: Int,

compiler/src/dotty/tools/dotc/transform/InstrumentCoverage.scala

@@ -97,7 +97,9 @@ class InstrumentCoverage extends MacroTransform with IdentityDenotTransformer:
         id = id,
         start = pos.start,
         end = pos.end,
-        line = pos.line,
+        // +1 to account for the line number starting at 1
+        // the internal line number is 0-base https://github.com/lampepfl/dotty/blob/18ada516a85532524a39a962b2ddecb243c65376/compiler/src/dotty/tools/dotc/util/SourceFile.scala#L173-L176
+        line = pos.line + 1,
         desc = sourceFile.content.slice(pos.start, pos.end).mkString,
         symbolName = tree.symbol.name.toSimpleName.toString,
         treeName = tree.getClass.getSimpleName.nn,

tests/coverage/pos/Constructor.scoverage.check

@@ -27,7 +27,7 @@ covtest.C
 <init>
 28
 36
-3
+4
 <init>
 DefDef
 false
@@ -44,7 +44,7 @@ covtest.C
 <init>
 69
 72
-5
+6
 g
 Apply
 false
@@ -61,7 +61,7 @@ covtest.C
 <init>
 80
 88
-8
+9
 <init>
 DefDef
 false
@@ -78,7 +78,7 @@ covtest.C
 <init>
 108
 128
-9
+10
 +
 Apply
 false
@@ -95,7 +95,7 @@ covtest.C
 f
 133
 138
-11
+12
 f
 DefDef
 false
@@ -112,7 +112,7 @@ covtest.C
 x
 153
 158
-12
+13
 x
 DefDef
 false
@@ -129,7 +129,7 @@ covtest.C
 <init>
 165
 169
-13
+14
 f
 Apply
 false
@@ -146,7 +146,7 @@ covtest.C
 <init>
 167
 168
-13
+14
 x
 Select
 false
@@ -163,7 +163,7 @@ covtest.C
 g
 173
 178
-15
+16
 g
 DefDef
 false
@@ -180,7 +180,7 @@ covtest.O$
 g
 203
 208
-18
+19
 g
 DefDef
 false
@@ -197,7 +197,7 @@ covtest.O$
 y
 223
 228
-19
+20
 y
 DefDef
 false
@@ -214,7 +214,7 @@ covtest.O$
 <init>
 235
 239
-20
+21
 g
 Apply
 false
@@ -231,7 +231,7 @@ covtest.O$
 <init>
 237
 238
-20
+21
 y
 Ident
 false

tests/coverage/pos/ContextFunctions.scoverage.check

@@ -27,7 +27,7 @@ covtest.OnError
 onError
 56
 67
-3
+4
 onError
 DefDef
 false
@@ -44,7 +44,7 @@ covtest.Imperative
 readName2
 121
 134
-7
+8
 readName2
 DefDef
 false
@@ -61,7 +61,7 @@ covtest.Imperative
 readPerson
 252
 309
-13
+14
 onError
 Apply
 false
@@ -78,7 +78,7 @@ covtest.Imperative
 readPerson
 252
 295
-13
+14
 <init>
 Apply
 false
@@ -95,7 +95,7 @@ covtest.Imperative
 $anonfun
 267
 294
-13
+14
 apply
 Apply
 false
@@ -112,7 +112,7 @@ covtest.Imperative
 readPerson
 192
 206
-11
+12
 readPerson
 DefDef
 false

tests/coverage/pos/Enum.scoverage.check

@@ -27,7 +27,7 @@ covtest.Planet
 surfaceGravity
 338
 356
-14
+15
 surfaceGravity
 DefDef
 false
@@ -44,7 +44,7 @@ covtest.Planet
 surfaceWeight
 444
 458
-15
+16
 surfaceGravity
 Select
 false
@@ -61,7 +61,7 @@ covtest.Planet
 surfaceWeight
 392
 409
-15
+16
 surfaceWeight
 DefDef
 false
@@ -78,7 +78,7 @@ covtest.EnumTypes$
 test
 1043
 1077
-30
+31
 println
 Apply
 false
@@ -95,7 +95,7 @@ covtest.EnumTypes$
 test
 1051
 1076
-30
+31
 +
 Apply
 false
@@ -112,7 +112,7 @@ covtest.EnumTypes$
 test
 1082
 1103
-31
+32
 println
 Apply
 false
@@ -129,7 +129,7 @@ covtest.EnumTypes$
 test
 1090
 1102
-31
+32
 s
 Apply
 false
@@ -146,7 +146,7 @@ covtest.EnumTypes$
 calculateEarthWeightOnPlanets
 1195
 1222
-34
+35
 surfaceGravity
 Select
 false
@@ -163,7 +163,7 @@ covtest.EnumTypes$
 calculateEarthWeightOnPlanets
 1229
 1320
-35
+36
 foreach
 Apply
 false
@@ -180,7 +180,7 @@ covtest.EnumTypes$
 calculateEarthWeightOnPlanets
 1238
 1251
-35
+36
 refArrayOps
 Apply
 false
@@ -197,7 +197,7 @@ covtest.EnumTypes$
 $anonfun
 1263
 1320
-36
+37
 println
 Apply
 false
@@ -214,7 +214,7 @@ covtest.EnumTypes$
 $anonfun
 1271
 1319
-36
+37
 s
 Apply
 false
@@ -231,7 +231,7 @@ covtest.EnumTypes$
 $anonfun
 1296
 1317
-36
+37
 surfaceWeight
 Apply
 false
@@ -248,7 +248,7 @@ covtest.EnumTypes$
 calculateEarthWeightOnPlanets
 1109
 1142
-33
+34
 calculateEarthWeightOnPlanets
 DefDef
 false
@@ -265,7 +265,7 @@ covtest.EnumTypes$
 test
 1326
 1347
-38
+39
 println
 Apply
 false
@@ -282,7 +282,7 @@ covtest.EnumTypes$
 test
 1352
 1385
-39
+40
 calculateEarthWeightOnPlanets
 Apply
 false
@@ -299,7 +299,7 @@ covtest.EnumTypes$
 test
 901
 909
-27
+28
 test
 DefDef
 false

tests/coverage/pos/Escaping.scoverage.check

@@ -27,7 +27,7 @@ covtest.\n.\r\n\f
 \r\n\f
 69
 80
-3
+4
 length
 Apply
 false
@@ -44,7 +44,7 @@ covtest.\n.\r\n\f
 \r\n\f
 40
 48
-3
+4
 \r\n\f
 DefDef
 false