Fix release only lexer bug

Sources/Compiler/Parse/Lexer.swift

@@ -178,13 +178,20 @@ struct Lexer {
             currentColumn += 1
         }
     }
+
+    /// Gets `currentIndex` through a noninlined call. Used to work around
+    /// an optimizer bug using a stale value of `currentIndex`.
+    @inline(never)
+    private func currentIndexOptimizerWorkaround() -> String.Index {
+        return currentIndex
+    }
 
     // SQLite does not seem to really care what goes between the escape delimiters.
     // Table names will gladly take newlines and such.
     private mutating func parseEscapedIdentifier(closing: Character) -> Token {
         let tokenStart = startLocation()
         advance() // Opening
-        let identifierStart = currentIndex
+        let identifierStart = currentIndexOptimizerWorkaround()
 
         while let current, current != closing {
             advance()
@@ -323,7 +330,7 @@ struct Lexer {
         advance() // 0
         advance() // x or X
 
-        let numberStart = currentIndex
+        let numberStart = currentIndexOptimizerWorkaround()
 
         while let current, Lexer.hexDigits.contains(current) || current == "_" {
             advance()
@@ -345,8 +352,8 @@ struct Lexer {
     private mutating func parseStringContents() -> (Substring, SourceLocation) {
         let tokenStart = startLocation()
         advance()
-        let stringStart = currentIndex
-        
+        let stringStart = currentIndexOptimizerWorkaround()
+
         while let current, current != "'" {
             advance()
         }

Tests/CompilerTests/LexerSliceReleaseTests.swift

@@ -0,0 +1,81 @@
+//
+//  LexerSliceReleaseTests.swift
+//
+//
+//  Created by Wes Wickwire on 6/27/26.
+//
+
+import Testing
+@testable import Compiler
+
+/// These tests only failed in a release build.
+@Suite
+struct LexerSliceReleaseTests {
+    @Test func escapedIdentifierStripsDelimiters() {
+        #expect(firstIdentifier("\"MyModel.ID\"") == "MyModel.ID")
+        #expect(firstIdentifier("[MyModel.ID]") == "MyModel.ID")
+        #expect(firstIdentifier("`MyModel.ID`") == "MyModel.ID")
+    }
+
+    @Test func stringLiteralStripsQuotes() {
+        #expect(firstString("'hello world'") == "hello world")
+    }
+
+    @Test func hexLiteral() {
+        #expect(firstHex("0xFF") == 255)
+    }
+
+    @Test func scientificNotation() {
+        #expect(firstDouble("1e3") == 1000)
+        #expect(firstDouble("1e-2") == 0.01)
+    }
+
+    @Test func aliasedColumnTypeGeneratesUnquotedName() {
+        var compiler = Compiler()
+        let (_, diags) = compiler.compile(migration: """
+        CREATE TABLE myTable (
+          id INTEGER AS "MyModel.ID"
+        );
+        """)
+        #expect(diags.isEmpty)
+        let table = compiler.schema.tables.values.first!
+        let col = table.columns.values.first!
+        #expect(!String(describing: col.type).contains("\""))
+    }
+
+    private func firstIdentifier(_ src: String) -> String? {
+        var lexer = Lexer(source: src)
+        while true {
+            let t = lexer.next()
+            if case .eof = t.kind { return nil }
+            if case let .identifier(v) = t.kind { return String(v) }
+        }
+    }
+
+    private func firstString(_ src: String) -> String? {
+        var lexer = Lexer(source: src)
+        while true {
+            let t = lexer.next()
+            if case .eof = t.kind { return nil }
+            if case let .string(v) = t.kind { return String(v) }
+        }
+    }
+
+    private func firstHex(_ src: String) -> Int? {
+        var lexer = Lexer(source: src)
+        while true {
+            let t = lexer.next()
+            if case .eof = t.kind { return nil }
+            if case let .hex(v) = t.kind { return v }
+        }
+    }
+
+    private func firstDouble(_ src: String) -> Double? {
+        var lexer = Lexer(source: src)
+        while true {
+            let t = lexer.next()
+            if case .eof = t.kind { return nil }
+            if case let .double(v) = t.kind { return v }
+        }
+    }
+}